actions
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each of the black spaces below before clicking
on it to display the answer.
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| action of sternocleidomastoid | unilaterally- lateral flexes and rotates head to opposite side.bilaterally- flexes neck, draws sternum superiorly during inspiration. elevates chin
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| action of platysma | depresses mandible and draws lower lip laterally. draws up skin of chest
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| action of scalenus anterior, medius, and posterior | together they flex neck. acting on one side they laterally flex and rotate neck
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| action of splenius capitis,cervicis | together they extend, hyperextend head and neck. acting on one side they laterally flex, rotate head an neck
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| action of erector spinae(iliocostalis,longissimus, and spinalis) | extends,and laterally flexes vertebral column,and rotates ribs. longissimus also extends and rotates head.
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| action of transversospinalis(semispinalis,multifidi, and rotatores) | extends and rotates vertebral column. semispinalis capitis extends and rotates head
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| action of interspinales | extends vertebral column
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| action of intertransversarii | lateral flexion of vertebral column
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| action of external intercostals | draw ribs upward, increasing the volume for inspiration
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| action of internal intercostals | draw ribs downward, decreasing the volume for expiration
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| action of diaphragm | draws cntral tendon inferiorly, for inspiration
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| action of external and internal oblique | compresses abdominal contents, laterally flexes and rotates vertebral column
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| action of transverse abdominal | compresses abdomen. holds in guts
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| action of rectus abdominis | flexes vertebral column, compresses abdomen
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| action of quadratus lumborum | laterally flexes vertebral column, elevates pelvis..helps with climbing
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| action of pectoralis major | adduction of arm, assists in shoulder flexion and medially rotates arm
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| action of pectoralis minor | anteriorly tips the scapula
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| action of subclavius | steadies during movements of the shoulder girdle
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| actions of coracobrachialis | shoulder flexion
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| actions of biceps brachii | shoulder flexion, elbow flexion, helps with supination
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| actions of brachialis | flexes forearm
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| actions of upper trapezius | elevation and upward rotation
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| actions of middle trapezius | adduction of scapula
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| actions of lower trapezius | upward rotation of scapula and scapula depression
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| actions of latissimus dorsi | shoulder extension, adduction, internal rotation
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| actions of levator scapulae | elevates and downward rotation
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| actions of rhomboid major and minor | elevation, adduction and downward rotation of scapula
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| actions of serratus anterior | aBduction of arm and upward rotation
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| actions of anterior deltoid | shoulder flexion
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| actions of middle deltoid | shoulder aBduction
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| actions of posterior deltoid | shoulder extension
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| actions of supraspinatus | intitiates aBduction but cant finish it
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| actions of infraspinatus | lateral shoulder rotator
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| actions of teres minor | lateral rotation of shoulder
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| actions of subscapularis | medial rotation of humerus
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| actions of teres major | medially rotate, adduct, and extend humerus.
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| actions of triceps brachii | posterior shoulder extension. elbow extension
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| actions of anconeus | extends forearm
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| actions of pronator teres | pronates and flexes forearm
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| actions of flexor carpi radialis | flexes hand, synergist in abduction with extensor carpi radialis longus and bevis
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| actions of palmaris longus | flexes the hand
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| actions of flexor carpi ulnaris | flexes hand, synergist in adduction of hand with extensor carpi ulnaris
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| actions offlexor digitorum superficialis | flexes the middle phalanges of the fingers
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| actions of flexor digitorum profundus | flexes distal phalanges
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| actions of flexor pollicis longus | flexes the thumb
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| actions of pronator quadratus | pronates forearm and hand
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| actions of brachioradialis | flexes forearm
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| actions of extensor carpi radialis longus | extends hand, synergist in aBduction of hand with flexor carpi radialis
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| actions of extensor carpi radialis brevis | extends hand, synergist in abduction of hand with flexor carpi radialis
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| actions of extensor digitorum | extends the fingers and wrist
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| actions of extensor digiti minimi | extends 5th digit
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| actinos of extensor carpi ulnaris | extends hand, synergist in adductin of hand with flexor carpi ulnaris
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| actions of supinator | supinates the forearm
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| actions of aBductor pollicis longus | aBducts, laterally rotates and extends thumb, aBducts wrist
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| actions of extensor pollicis brevis | extends thumb and aBducts hand
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| actions of extensor pollicis longus | extends thumb
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| actions of extensor indicis | extends the index finger
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| actions of palmaris brevis | corrugates lateral skin of palm
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| actions of aBductor pollicis brevis | aBducts thumb, and moves it anteriorly (flexion). acts together with other muscles of thenar eminence to oppose thumb to other fingers
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| actions of flexor pollicis brevis | flexes mcp joint of thumb. acts with other muscles of thenar eminence to create opposition of thumb to fingers and assists in abductin and rotation of thumb
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| actions of opponens pollicis | rotates thumb into opposition with fingeres and acts together with thenar eminence muscles to oppose thumb to other fingers
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| actions of adductor pollicis | adducts thumb. forms webspace in hand
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| actions of aBductor digiti minimi | aBducts fith finger
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| actions of flexor digiti minimi brevis | flexes fifth giner at mcp joint
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| actions of oponens digiti minimi | rotates 5th metacarpal bone. assists flexor digit minimi brevvis in flexing ccarpometacarpal joint of 5th finger
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| actions of lumbricales | extend ip joints and weakly flex fingers at mcp joints
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| actions of palmar interossei(PAD) | adduct fingers toward center of 3rd finger at mcp joints
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| actions of dorsal interossei (DAB) | aBucts fingers away fro the center of the 3rd finger at mcp joints.
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| actions of psoas major | hip flexion
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| actions of iliacus | flexes femur
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| actions of pirifomis | laterally rotates femur
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| action of obturator internus | laterally rotates femur
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| action of gemellus superior | laterally rotates femur
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| actions of gemellus inferior | laterally rotates femur
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| actions of obturator externus | lateral rotation of femur
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| action of quadratus femoris | laterally rotates femur
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| action of gluteus maximus | hip extension
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| action of gluteus medius | hip aBduction
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| action of gluteus minimus | aBducts hip
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| action of tensor fasciae latae | hip aBduction
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| action of sartorius | flexes, aBducts, and laterally rotates hip
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| actions of rectus femoris | extends knee and flexes thigh.
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| actions of vastus lateralis | extends knee
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| actions of vastus medialis | knee extension
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| actions of vastus intermedius |
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Created by:
babyb06
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