Harper College Muscles and Heart Anatomy
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Levator Labii Superioris
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Levator Palpebrae Superioris
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External oblique
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Compresses abdomen; laterally flexes and rotates vertebral column
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Internal intercostals
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Draws the ribs together and depresses rib cage
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Internal oblique
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Compresses abdomen; laterally flexes and rotates vertebral column
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Rectus abdominis
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Compresses abdominal cavity and flexes vertebral column
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Transversus abdominis
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Constricts abdomen and supports abdominal viscera
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External intercostals
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Elevates the rib cage
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Pectoralis minor
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Elevates 3rd-5th ribs during forced inspiration
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Diaphragm
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Flattens on contraction increasing the volume of thorax during inspiration
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Transversus abdominis
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Constricts abdomen and supports abdominal viscera
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Erector Spinae - Spinalis
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Extends vertebral column
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External oblique
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Compresses abdomen; laterally flexes and rotates vertebral column
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Serratus anterior
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Pulls scapula anteriorly and downward
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Latissimus dorsi
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Back muscle that causes shoulder extension, adduction, horizontal abduction and horizontal abduction
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Biceps brachii
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Flexes and supinates forearm
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Brachialis
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Flexes elbow
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Deltoid
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Flexes, medially rotates, and abducts arm
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Infraspinatus
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Laterally rotates shoulder; stabilizes the head of the humerus in glenoid cavity; one of the "rotator cuff" muscles
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Supraspinatus
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Abducts arm; stabilizes the head of the humerus in glenoid cavity; one of the "rotator cuff" muscles
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Teres minor
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Laterally rotates arm; one of the "rotator cuff" muscles
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Teres major
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Medially rotates and adducts the arm
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Triceps brachii
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Extends forearm
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Biceps brachii
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Flexes and supinates forearm
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Brachioradialis
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Flexes elbow
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Coracobrachialis
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Flexes and adducts the humerus
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Extensor digitorum
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Extends fingers and the wrist
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Flexor carpi radialis
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Flexes wrist and abducts hand
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Flexor carpi ulnaris
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Flexes and adducts wrist
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Palmaris longus
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Flexes wrist
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Pronator teres
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Pronates forearm and assists in flexing the elbow
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Triceps brachii
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Extends forearm
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Trapezius
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Elevates, depresses, retracts, and rotates the scapula; rotates the arm
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Trapezius
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Elevates, depresses, retracts, and rotates the scapula; rotates the arm
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Latissimus dorsi
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Extends, adducts, and medially rotates the arm; draws the shoulder downward and backward
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Pectoralis major
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Adducts and medially rotates the arm; flexes and extends humerus
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Serratus anterior
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Abducts and protracts the scapula
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Extensor carpi radialis longus
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Extends wrist and abducts hand
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Serratus anterior
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Abducts and protracts the scapula
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Latissimus dorsi
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Extends, adducts, and medially rotates the arm; draws the shoulder downward and backward
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Pectoralis major
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Adducts and medially rotates the arm; flexes and extends humerus
