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lecture exam 3
actions of muscles
| Question | Answer |
|---|---|
| sternocleidomastoid | flexes and laterally rotates head |
| orbicularis oculi | closes eye |
| zygomaticus major | elevates corner of the mouth upward; smiling |
| zygomaticus minor | elevates corner of the mouth; smiling |
| orbicularis oris | closes lips; kissing muscle |
| masseter | closes jaw; matication |
| temporalis | closes jaw; mastication |
| buccinator | compresses cheek; blowing whistling,sucking |
| digastric (both bellies) | opens mouth and depresses mandible |
| erector spinae group | extends and laterally flexes vertebral column |
| quadratus lumborum | flexes vertebral column laterally |
| anterior scalene | elevates 1st tow ribs |
| middle scalene | elevates 1st two ribs |
| posterior scalene | elevates 1st two ribs |
| external intercostals | elevates rib cage; inhalation |
| internal intercostals | depresses ribs; exhalation |
| rectus abdominis | flexes and rotates lumbar region of vertbral column |
| trapezius | stabilizes, retracts, raises and rotates scapula |
| deltoid | abducts shoulder |
| supraspinatus | initiates abduction |
| infraspinatus | lateral rotation at shoulder |
| teres minor | lateral rotation at shoulder |
| subscapularis | medial rotation at shoulder |
| teres major | extends, medially rotates and adducts humerus |
| pectoralis major | medial rotation, flexion and adduction at shoulder |
| latissimus dorsi | medial rotation, extension and adduction at shoulder |
| triceps brachii | extension at elbow |
| biceps brachii | flexion at elbow and supination |
| brachioradialis | flexion at elbow |
| pronator teres | pronates wrist |
| flexor carpi radialis | flexes and abducts wrist |
| palmaris longus | flexes wrist (weak); tenses skin and fasciae of palm during hand movement |
| flexor carpi ulnaris | flexes and adducts wrist |
| extensor carpi ulnaris | extends and adducts wrist |
| extensor digitorum | extends digits |
| extensor carpi radialis brevis or longus | extends and abducts wrist |
| flexor digitorum supericialis | flexes wrist and middle phalanges of digits 2-5 |
| supinator | assists biceps brachii to supinate forearm |
| biceps femoris | flexes knee and extension at hip |
| semitendinosus | flexes knee and extension at hip |
| semimembranosus | flexes knee and extension at hip |
| rectus femoris | extends knee and flexes thigh at hip |
| vastus lateralis | extends knee |
| vastus intermedius | extends knee |
| vastus medialis | extends knee |
| psoas major | flexes hip and flexes vertebral column laterally |
| iliacus | flexes hip |
| gluteus maximus | extends and laterally rotates hip |
| gluteus medius | abducts and medially rotates hip |
| tibialis anterior | dorsiflexes foot |
| gastrocnemius | plantarflexes (ankle extension) |
Created by:
alfinia
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