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exercise 13
Gross anatomy of the muscular system
| Question | Answer |
|---|---|
| epicranius* | raises eyebrows for a questioning expression |
| orbicularis oculi* | used in blinking and squinting (closes eye) |
| orbicularis oris* | kissing muscle (closes mouth) |
| buccinator | used to suck in cheeks |
| zygomaticus | used in smiling (draws corner of mouth upward) |
| temporalis | closes jaw |
| masseter* | prime mover to raise mandible (closes jaw) |
| sternocleidomastoid* | prayer muscle (rotates head, flexes head) |
| trapezius* | shrugging the shoulders (extends head, neck) |
| external intercosals | elevate ib cage, aids in inspiration |
| internal intercostals | depresses rib cage, aids in forced expiration |
| rectus abdominis | flexes and rotates vertebral column |
| external oblique* | aids muscles of back in trunk rotation and lateral flexion |
| transverse abdominis* | compresses abdomen |
| serratus anterior* | abducts and raises arm |
| pectoralis major* | prime mover of arm flexion |
| latissimus dorsi* | prime mover of arm extension |
| infraspinatus | stabilizes shoulder/lateral rotation of humerus |
| deltoid* | prime mover of arm abduction |
| triceps brachii* | forearm/elbow extensor |
| biceps brachii* | flexes forearm and supinates the hand |
| brachialis* | flexes forearm/no role in supination |
| brachioradialis | flexes forearm/no role in supination |
| tensor fasciae latae | abducts thigh/ "at ease" stance |
| gluteus medius* | abducts thigh/"at ease" stance |
| gluteus maximus* | extends hip/thigh (used in climbing stairs) |
| quadriceps - rectus femoris | extends knee/flexes thigh at hip |
| vastus lateralis* | extends and stabilizes knee |
| vastus medialis | extends knee/stabilizes patella |
| vastus intermedius | extends knee |
| Hamstrings - Biceps femoris* | flexes knee/extends thigh |
| Semimembranosus* | flexes knee/extends thigh |
| semitendinosus* | flexes knee/extends thigh |
| sartorius* | flexes knee/flexes, abducts, rotates thigh (tailor's muscle) |
| adductor group | adducts, flexes rotates thigh |
| adductor magnus | adducts, flexes rotates thigh |
| adductor longus* | adducts, flexes rotates thigh |
| adductor brevis | adducts, flexes, rotates thigh |
| gracilis | adducts thigh/flexes and rotates leg |
| tibialis anterior* | dorsiflexes foot |
| gastrocnemius* | plantar flexes foot |
| soleus* | plantar flexes foot |
| fibularis longus | plantar flex and everts foot; keps foot on the ground |
| prime mover | term for the biceps brachi during forearm flexion |
| synergist | term that describes the relation of brachioradialis to biceps brachi during forearm flexion |
| anatagonist | term for the triceps brachi during forearm flexion |
| anatagonist | term for the iliopsoas during thigh extension |
| prime mover | term for the gluteus maximus during thigh extension when walking up stairs |
| fixator | term for the rotator cuff muscles and deltoid when the forearm is flexed and the hand grabs a tabletop to lift the table |