NDT – Flashcard
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NDT is referred to as what
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Bobath approach Bc it was developed by Berta and Karel Bobath
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What is the MAIN assumption of NDT
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it is impossible to superimpose normal movement patterns over abnormal patterns
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NDT is one of the most commonly used treatment approaches in OT for treatment in what
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-children with neurological deficits -adults with hemiplegia and tbi
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What are all of the assumptions of NDT
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*Model of motor control Originally assumed the hierarchical organization of CNS* Continues to view the CNS as important for movement, but has also adopted the view that movement is a result of multiple interacting processes. *CNS damage results in motor dysfunction* -Development of abnormal tone and movement -Loss of effective movement responses Normal movement can not be superimposed on abnormal movements *Function improved through use of effective movement patterns* -Handling: - manual hands on interventions designed to change muscle tone and normalize the quality of the pateint's movements. Handling is used for inhibition and facilitiation -Key points of control -Inhibition/facilitation
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NDT looked at what kind of system
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*Looked at hierarchical system* Hierarchical - spinal cord - brainstem- cortical Cephalo-caudal, proximal - distal, gross to fine
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what are associated reactions
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involuntary and nonfunctional changes in limb position and muscle tone associated with difficult or stressful activities
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facilitation vs inhibition
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Facilitation: manual techniques and other processes including tactile and verbal feedback used to help the patient achieve a more normal quality of movement Inhibition: manual techniques and positions used to decrease or eliminate the effects of spasticity and/or abnormal reflex activity
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Flaccidity Increased tone Severe tone
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Flaccidity: no movement Increased tone: abnormal patterns Severe tone: posturing
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Distributed model of control
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Lesion can result in: -Abnormal tone -Disturbed synergistic organization -Weakness -Perceptual deficits -Impaired sensation -Dec ROM -Balance deficits
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Systems model of motor control
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Looks at multiple interacting processes Task goals in the center of: -environmental systems -comparing systems -sensorimotor systems -musculoskeletal systems -commanding systems -regulation systems
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Motor impairments result in what
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movement dysfunction
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Positive signs vs negative signs
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*Positive Signs* Spasticity: lack of control from descending tracts -Impaired muscle activation -Impaired motor execution *Negative Signs* Weakness -Insufficient Force Generation Impaired anticipatory postural Control Hypokinesia -poverty of Movement Loss of Fractionated or Dissociated Movements
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What is spasticity
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"an upper motor neuron disorder that is characterized by velocity-dependent increases in tonic stretch reflexes with exaggerated tendon jerks and clonus resulting from *hyperexcitability of the stretch reflex*"
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What kind of input does spasticity have
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*enhanced excitatory input* *Reduced inhibitory input because of impaired descending pathways*
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What are the steps to the knee jerk reflex
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1. afferent impulses from stretch receptor to spinal cord 2. efferent impulses to alpha motor neurons cause contraction of the stretched muscle that resists/reverse the stretch 3. efferent impulses to antagonist muscles are dampled (reciprocal inhibition)
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Early vs recent research on spasticity
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In early NDT research spasticity was thought to be the primary impairment creating movement dysfunction Recent research has shown that even when spasticity is inhibited through medication, positioning, biofeedback or dorsal rhizotomy *movement dysfunction remains and is more related to negative symptoms of strength, timing, and sequencing*.
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Excessive Co-activation (Co-contraction) is what type of strategy
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compensatory Ex: locking your knee into extension Creates joint stiffness
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What is referred to as fixing in NDT
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reduction in DOF strategy
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Impaired muscle synergies
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Functional linking or coupling of muscle groups Patterns can be so strong (stereotypical) that they restrict adaptation to conditions for variable and fluid movement
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Spasticity results in what
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Positive sign impaired muscle activation (co-activation) impaired motor execution
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What are the problems with impaired motor execution
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problems with -modulation and scaling of forces -Problems with *timing -Sequencing -Associated reaction: overflow of movement
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What are the problems seen with difficulty with force modulation
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Difficulty executing appropriate force & tension for grasp & release -They can grasp a cup but can not release the grasp on the cup -Difficulty controlling acceleration & deceleration -Due to a lack of breaking movement/deceleration from antagonist Example: difficulty scaling forces to grasp a cup, inability to release
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What are the problems seen with difficulty with timing
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difficulty initiating, slow performance, & difficulty terminating movement* -Inadequate force generation to overcome gravity, or antagonist restraint -Inadequate speed of force generation -Insufficient ROM to allow movement -Abnormal postural control -Inadequate reaction time
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What are the problems seen with difficulty with sequencing
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-Activate muscles in the wrong sequences -Muscles firing in opposition to the movement -Prolonged contraction in a movement -Firing wrong muscle Ex: pectoralis major kicks in first (UE extension synergy)
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What is associated reaction
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overflow of movement -Widespread contractile activity in same body segment or in other body segments such as the unaffected side -Part of normal development -Can also be an indication that the task requirements are greater than the client can handle to be self organizing
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what is an example of negative symtpoms
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insufficient force generation- weakeness
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What are the primary and secondary causes of the negative symptom of the inability to generate enough force for posture & movement WEAKNESS
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*primary* -Insufficient descending neural activity converging on spinal motor neuron pool -Reduced number of motor units -Difficulty modulating firing frequency *Secondary causes* -Atrophy from disuse -Atypical development of fiber type
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Impaired Anticipatory Postural Control
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(negative symptom) Generation of force prior to intended movement to set posture -Need to anticipate force, velocity, and direction of intended movement and objects involved -Difficulty wt. shifting to adjust posture -Can not anticipate postural shift needed to engage in an reach so they don't do it -Difficulty moving in and out of postures Secondary causes: -Inability to engage in one's environment or at will. -Increases risk for falls
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Hypokinesia
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poverty of movement (negative symptom)
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What are the sterotypical movement of hypokinesia
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-There is a lack fluidity, variety, or complexity -Ranges of movement small -Usually flexion & extension without rotation -Difficulty getting in and out of postures
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Adults with stroke have paucity of movement (hypokinesia)
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-Do not automatically adjust posture in sitting (risk of pressure sores and decubiti) -Tend to have all their weight on affected side in sitting -Do not spontaneously practice movements -Results in malalignment of posture - pelvic obliquity, scoliosis, kyphosis. See problems affecting cervical and lower extremities
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What is a loss of Fractionated/Dissociated Movements
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Difficulty making precise, isolated, independent joint movements
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What are the results in sterotypic patterns for loss of Fractionated/Dissociated Movements
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Loss of hand dexterity Loss of trunk rotation Loss of movement in mid ranges
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What are problems that result from sensory impairments
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tactile, proprioceptive, vestibular, visual On the affected side inability to: -Detect & identify incoming information -Interpret input: A fly can go on the unaffected side and they can react, but if it is on the affected side the input and output is affected so they will not respond -Modulate inputs to match task & environmental demands -Match information with experience, memory, & specific tasks
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NDT's view of movement Control Problems after Stroke include what?
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-A loss in postural control -Abnormal tone -Inability to activate muscles automatically to maintain body in balance at rest and during movement
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A loss of postural control after a stroke results in what
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-Difficulty shifting weight -Difficulty maintaining stable body position against gravity -Difficulty activating equilibrium responses when balance is challenged -When you can not weight shift you see little steps. When you weight shift evenly you will have normal step length
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What is abnormal tone (what are the 2 types)
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motor impairment associated with hemiplegia. -alterations in muscle tension and resistance to passive stretch Flaccidity: muscle tone is lower than normal Spasticity: develops gradually in selected muscles and is characterized by excessive muscle stiffness and slow effortful movements -You may not see spasticity right away
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NDT teaches you to use what paradigm
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Force use paradigm Forces the person to use the affected side so they work on *programming*
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The inability to activate muscles automatically to maintain body in balance at rest and during movement results in the loss of what and prevents people from doing what
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Loss of selective movement control of the muscles controlling movement of the hemiplegic arm and leg Prevents people from using hemiplegic arm, and tends to force reliance on one-handed techniques
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What are the principles of NDT
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1. Abnormal patterns of muscle tone and motor control are the major impairments interfering with normal motor control of the body. 2. Techniques (Inhibition/facilitation, handling with key points of control and adjusting environmental demands ) decrease abnormal reflex activity and muscle tone while increasing normal patterns of movement on the hemiplegic side. 3.Rejects use of compensatory approaches that neglect potential for function or encourage abnormal movement and reflex activity (=Task oriented approach)
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What are handling techniques for NDT of patients with strokes
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Manual techniques to address malalignment of posture, muscle imbalance and movement control Handling - reflects hands-on aproach. -Dynamic process -activates movement responses to decrease abnormal tone and -Improves coordination and re-educate normal movements
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What are steps to using the handling techniques
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1. By providing specific tactile, proprioceptive, and kinesthetic messages 2. Using key points of hand placement to control movement patterns that the therapist wishes to influence 3. Inhibition and facilitation -To influence posture and movement of trunk, shoulder girdle, and hip use *proximal and distal* key points
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Inhibition and facilitation techniques of handling exercises
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-Treatment typically begins with Joint mobilization -Weight bearing facilitates muscle activation and control and inhibiting the abnormal movements -Inhibition to decrease spasticity and block or eliminate abnormal patterns of movement. -After muscle tone is normalized, facilitation techniques are used while engaging in functional components of a task. -Once you have addressed the muscle tone you can work on things like reaching *Assumption is that facilitation will minimize learning of abnormal movements by allowing patient to practice normal patterns of movement.*
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What approach do NDT therapists use
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task oriented approach occupation-as-means and occupation-as-end to ensure improvements are incorporated into occupational performance.
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NDT's relationship to occupational functioning
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Bobaths believed that treatment directed *toward improving the status of sensorimotor performance* components would result in improved occupational performance. Frequently, when patients learn new movements, they often spontaneously use these movements functionally.
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Occupation as ends
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-Patient is directly involved in learning an *activity or task*. -Intervention is individualized and the treatment environment is constantly modified so occupation-as-end techniques are designed to maintain symmetry, bilateral use, in corporation of involved extremities into task performance -Using force used paradigm: making sure the extremity is involved in some way when performing a task
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Occupation as means
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-Therapist uses activities therapeutically to influence impairments and provide opportunities for motor learning and practice. -*Incorporates movement patterns that the patient can perform independently without asymmetry or excessive use of the uninvolved side.* -Helps client focus on end goal rather than specifics of movement (implicit learning/procedural learning) -Get them to focus on an end goal you are involving a *procedural form* of learning
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Assessment in the NDT Approach gather what information
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-Movement control and functional status -Problems interfering with functional use of hemiplegic side -Patient's response to handling
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Assessments in the NDT approach can be gained through what
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Observation of patient's behavior -Typical posture -Preferred movement patterns (ask them to reach for something) -Spontaneous use of hemiplegic side Observations of patient's performance in: -ADLs -Transfers -Bed mobility -Evaluation of motor patterns and the patients response to being moved
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What are the Treatment Goals for the Stages of Recovery for NDT and strokes
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1. Address limitations in ADLs and IADLs 2. Address impairments in basic abilities and capacities in the trunk and arm, including identifying problems that may benefit from inhibition or facilitation Ex rotational movements to help with reach 3. Adapted techniques for ADL, bed mobility, transfers, and wheelchair management: Ex: modify a WC to aid manoeuvring. You may have to take off the armrest if they have posture control and they don't have ROM 4. Prevent learned neglect, postural asymmetry, or associated reactions -Look at what it is that is actually limiting them from engaging in the task. Look at it in a multidemential way 5. Inhibiting abnormal tone and movement for spasticity
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How do you inhibit abnormal tone and movement
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By increasing normal movement responses in ANTAGONISTIC muscles -Improving occupational performance by incorporating hemiplegic side into task performance -Training of new tasks -Decrease compensation in tasks that are performed independently
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Integrating NDT into OT practice
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-Most effective when everyone on team uses similar approach to management -Client has one unified message and internalizes what is right. -You shouldn't give them a hemiwalker if you are trying to get them to use the affected side as well -Occupational therapist can have a significant effect on tone management and movement by integrating NDT principles and techniques into practice if the interdisciplinary team uses the same approach
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Treatment of the Hemiplegic Arm is designed to address what impairments
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-Subluxation -Abnormal tone -Pain -Loss of movement control related to deficits in capabilities and occupational performance
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What are specific inhibition treatments for hemiplegic arm
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Inhibition Techniques: joint mobilization and weight bearing Focus on reflex-inhibiting patterns -Scapula/UE mobilization (UE lab) and trunk mobilization (Posture lab) -Trunk mobility & rotation -Weight bearing
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What are specific facilitation treatments for hemiplegic arm
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-Re-educate selective arm movements -Teach patient to use the arm for weight bearing -Increase skilled use of the hand
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Both inhibition and facilitation are used in every treatment so that...
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changes in tone and muscle length are immediately translated into motor and functional performance. Adapt the environment and task, so pt. can incorporate the learned skills in everyday routine. Have the family approach on the affected side so that they can begin working on the neglected side Train family and nursing staff on recommendations on how to adapt the environment, how to cue and how to facilitate desired movements.
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What is the assumption of inhibition
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Normal movements cannot be facilitated in the presence of abnormal tone and reflex activity.
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Why use inhibition to reduce spasticity and for intervention
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Reduction of spasticity allows pt. to follow guided movement more easily and to initiate arm movements outside of synergy. For intervention: joint mobilization
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Reflex-Inhibiting Patterns
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Gradually move arm into a position that includes shoulder girdle depression, shoulder external rotation, elbow and wrist extension, and an open hand. Use trunk rotation and shoulder mobilization start in supine -> sitting and move into weight bearing in sitting to inhibit flexor spasticity in the arm.
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In presence of low tone and weakness rather than spasticity, inhibition techniques are used for the following:
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To maintain muscle length and normal joint mechanics To prevent development of spasticity and abnormal coordination
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How should you place a pt when in wheelchair or bed
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-Flaccid arm should be positioned in bed to maintain muscle length. -Elbow extension -Shoulder girdle abduction -External rotation -Flaccid arm should be positioned in wheelchair to prevent subluxation and spasticity. -Maintain alignment, don't have their arm sitting on a foam pad elevating their shoulder
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How to position pt in supine
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Don't put a towel in their hand Towel: -Under knee -Affected hip -Arm in extension on a pillow
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How to position pt in side lying on unaffected side
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Affected arm on a pillow Affected side leg on a pillow
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Positioning in side lying affected side
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Maintain shoulder protraction and abduction and have elbow in extension
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Use of weight bearing for UE treatment maintains what
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*Muscle length* -Reaching out: Teach Coactivation and stabilization -Reaching on the floor: elbow flexion and extension -Reaching behind: rotation *Retrain* -Synchronized movement of agonist and antagonist, -Increase activity in the muscles of the trunk and arm *Dynamic Process* -Patient taught to activate muscles in trunk by moving body weight over stable arm -Movement of trunk causes muscles in arm and hand to lengthen, shorten, and contract to maintain arm on support surface
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How should you do weight bearing of UE during treatment
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*Facilitate muscles that are weak in UE shoulder girdle and trunk* -You begin with having the arm weight bearing and you reach for objects with your arm steady on a mat. As they gain control of the arm you want to move the arm against a stable body 1. Follow by closed chain movements -Arm resting on table 2. Modified closed chain movements -Towel on an incline and sliding board and have them move up and down the incline 3. Open chain movements. -Move in air -Start in sitting and progress to these exercises in standing -When engaging in ADLs if arm does not have selective movement, recommend arm be placed in wt. bearing when engaging in Eating, reading, writing, grooming
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UE treatment and facilitation of arm movement is used for what reasons
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-To give the patient the sensation of normal movement -To teach normal patterns of initiating and sequencing -To re-educate and strengthen normal movements to be used for function
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Facilitation of Arm Movement proximal and distal key points
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-To establish normal alignment in the arm -Facilitate movement patterns that are important for functional use. -Through graded Sensory input the therapist ensure quality of movement stays relatively consistent when facilitation is withdrawn. -Facilitation techniques used to limit overuse and excessive effort that many hemiplegic patients use to initiate movements of their involved side. -You initially use a lot of input and as they can begin initiating movement you need to take away the input
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Shoulder mechanics for facilitation of arm movements
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Therapist must correct shoulder joint alignment and maintain normal joint mechanics while facilitating arm movements in any position to avoid traumatizing the shoulder joint. If the serratus anterior is weak and you have them reaching for something and causing external rotation you could be causing more damage. Strengthen the serratus anterior FIRST
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Elbow flexion/extension mechanics for facilitation of arm movements
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To use the arm for function, the therapist uses facilitation of elbow flexion and extension so that the patient gains control of elbow movements outside the pattern of mass flexion Once they gain control of this they can perform open and closed chained movements easier
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UE Treatment: Arm Treatment in Supine
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When there is not shoulder stability, have them lie in supine because everything will fall in place and you can take them through movements *Use proximal and distal key points* of control on the arm to extend the hemiplegic elbow and shoulder into flexion. When hemiplegic arm can be moved without pain or resistance, begin use of facilitation to increase muscle activity in modified closed chain or open chain movements. Engage Pt in using *place and hold techniques* to promote synchronization btw opposing muscles and control in mid ranges. As skill in the ability to place the arm and to move in small ranges without loss of control is adequate, handling is lightened or removed to allow opportunities for independent practice.
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Facilitation in Arm Treatment: Arm Movement in Sitting
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-Initially, control the position of the shoulder girdle during guided movements of the arm -To ensure adequate scapular humeral rhythm *2:1* -To strengthen normal patterns of coordination and prevent pain. Progression of exercise routine -Wt. bearing/closed chain movements -Modified closed chain movements in a level plain -Modified closed chain movements in an inclined plane -Open chain movements
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Using Occupation-As-Means in Arm Treatment
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*Used to practice and strengthen movement control in the hemiplegic arm* Handling techniques used at first, but then withdrawn, letting patient practice without assistance. Activities can be set up with the hemiplegic arm in weight bearing. -Meant to teach patient that the hemiplegic arm can be used to provide support and assist balance -The patient may also practice using weight bearing to inhibit associated reactions during dressing -Provides opportunities for practice -Therapist selects tasks for occupation-as-means according to the movement components embedded in them.
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Occupation-As-End Treatment
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Therapists incorporate NDT principles, by using specific compensations, and inhibition of abnormal movements to promote engagement in occupations -Designed to incorporate the involved arm into task performance and to prevent spasticity and abnormal coordination in the hemiplegic arm -Early treatment focus on retraining basic ADLs. -Progress to training of vocational tasks.
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Compensations during occupation as end treatment is designed to promote what
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-Symmetry -Prevent neglect of the hemiplegic arm -Inhibit abnormal tone and movement
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Contributions to Psychosocial Adjustment
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NDT focuses on incorporating the hemiplegic side into treatment, which provides a different message than traditional treatments. Minimizes or eliminates secondary impairments that affect quality of life Provides realistic hope of functional recovery with possible contribution to a more positive attitude toward the disability and a sense of self-efficacy
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Efficacy and Outcomes Research of NDT
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-Literature review demonstrated small number of recent studies examining the efficacy of the NDT/Bobath approach to stroke rehabilitation. -Comparison of treatment with NDT to traditional treatment regarding improvement of functional outcomes -*Research reports that it is used extensively but it is not superior over other treatment approaches.* *Issues with current research: difficulty standardizing treatment because treatment is individualised and evolving*
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Barriers to effectiveness in NDT
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Major criticism is that NDT approach is too passive and lacking in opportunities for independent practice. Research on motor learning suggests that restriction of patients' movement until they are able to use normal patterns may limit patients' functional recovery and ultimate use of the involved side.
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Techniques handling to provide sensory-motor input for NDT
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-Key points of control -Weight bearing and positioning -Facilitation and inhibition -Environmental and task modifications to engage pt. in occupation as means and occupation as ends.