Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
MC Bio 204 ch 11
muscular system
| Question | Answer |
|---|---|
| zygomaticus major | O/zygomatic bone | I/skin at angle of mouth and orbicularis orbis |
| masseter | O/maxilla and zygomatic arch | I/angle and ramus of mandible |
| sternocleidomastoid | O/sternum and clavicle | I/mastoid process of temporal bone |
| pectoralis major | O/clavicle, sternum, and costal cartilages of the second to sixth ribs | I/greater tubercle and lateral lip of the intertubular sulcus of humerus |
| deltoid | O/acromial extremity of clavicle (anterior fibers), acromion of scapula (lateral fibers), and spine of scapula (posterior fibers) | I/deltoid tuberosity of humerus |
| action of the zygomaticus major | draws angle of mouth superiorly and laterally, as in smiling |
| action of the masseter | elevates mandible, as in closing mouth |
| action of the sternocleidomastoid | acting together (bilaterally), flex cervical portion of vertebral column, flex head; acting singly (unilaterally), laterally extend and rotate head to side opposite contracting muscle |
| action of the pectoralis major | as a whole, adducts and medially rotates arm at shoulder joint; clavicular head flexes arm |
| action of the deltoid | lateral fibers abduct arm at shoulder joint; anterior fibers flex and medially rotate arm at shoulder joint; posterior fibers extend and laterally rotate arm at shoulder joint |
| biceps brachii | O/long head: tubercle above glenoid cavity of scapula; short head: coracoid process of scapula | I/radial tuberosity of radius and bicipital aponeurosis |
| action of the biceps brachii | flexes forearm at elbow joint, supinates forearm at radioulnar joints, and flexes arm at shoulder joint |
| pronator teres | O/medial epicondyle of humerus and coronoid process of ulna | I/midlateral surface of radius |
| action of the pronator teres | pronates forearm at radioulnar joints and weakly flexes forearm at elbow joint |
| flexor carpi radialis | O/medial epicondyle of humerus | I/second and third metacarpals |
| action of the flexor carpi radialis | flexes and abducts hand (radial deviation) at wrist joint |
| psoas major | O/transverse processes and bodies of lubar vertebrae | I/with iliacus into lesser trochanter of femur |
| action of the psoas major | psoas major and iliacus muscles acting together flex thigh at hip joint, rotate thigh laterally, and flex trunk on hip as in sitting up from supine position |
| gluteus maximus | O/ileac crest, sacrum, coccyx, and aponeurosis of sacrospinalis | I/iliotibial crest of fascia lata and lateral part of linea aspera (gluteal tuberosity) under greater trochanter of femur |
| action of the gluteus maximus | extends thigh at hip joint and laterally rotates thigh |
| gluteus medius | O/ileum | I/greater trochanter of femur |
| action of the gluteus medius | abducts thigh at hip joint and medially rotates thigh |
| rectus femoris | [part of the quadriceps femoris] O/anterior inferior ileac spine | I/patella via quadriceps tendon and then tibial tuberosity via patellar ligament |
| action of the rectus femoris | extends leg at knee joint; flexes thigh at hip joint |
| semimembranosus | O/ischial tuberosity | I/medial condyle of tibia |
| action of the semimembranosus | flexes leg at knee joint and extends thigh at hip joint |
| gastrocnemius | O/lateral and medial condyles of femur and capsule of knee | I/calcaneus by way of calcaneal (Achilles) tendon |
| action of the gastrocnemius | plantar flexes foot at ankle joint and flexes leg at knee joint |
| belly | the fleshy portion of the muscle between the tendons |
| origin | the attachment of a muscle's tendon to the stationary bone |
| insertion | the attachment of a muscle's tendon to movable bone [the origin is usually proximal and the insertion is usually distal] |
| prime mover, aka agonist | a muscle that causes a desired action |
| antagonist | a muscle that relaxes as the agonist contracts; stretches and yields to the movement of the agonist |
| synergists | muscles that contract and stabilize the intermediate joints when an agonist is acting on a joint that is multiple joints away from the agonist's origin [e.g., stabilizing wrist when certain muscles with origins high up the arm act on the fingers |
| action of the frontalis (occipitofrontalis frontal belly) | raises eyebrow, wrinkles forehead |
| action of the orbicularis orbis | closes and protrudes lips |
| action of the orbicularis oculi | closes eye |
| action of the temporalis | elevates mandible |
| action of the rectus abdominis | compresses abdomen, flexes vertebral column |
| action of the external oblique | unilaterally: rotates vertebral column || bilaterally: compress abdomen and flex verterbral column |
| action of the erector spinae | extends vertebral column |
| action of the diaphragm | increases size of thoracic cavity for inspiration |
| action of the external intercostals | elevates ribs for inspiration |
| action of the internal intercostals | depresses ribs for expiration |
| action of the pectoralis major | pulls scapula anteriorly and downward |
| action of the serratus anterior | pulls scapula anteriorly |
| action of the trapezius | elevates, depresses, and adducts scapula || extends neck (moves head back) |
| action of the latissimus dorsi | extends and adducts arm at shoulder; depresses shoulder |
| action of the teres major | extends and adducts arm at shoulder |
| action of the triceps brachii | extends forearm at elbow |
| action of the supinator | supinates forearm |
| action of the flexor digitorum superficialis | flexes fingers |
| action of the extensor digitorum | extends fingers |
| action of the extensor carpi ulnaris | extends and adducts wrist |
| action of the iliacus | flexes hip, flexes vertebral column |
| action of the adductor longus | flexes and adducts hip |
| action of the gracilis | adducts hip, flexes knee |
| action of the vastus lateralis | extends knee |
| action of the vastus medialis | extends knee |
| action of the vastus intermedius | extends knee |
| action of the sartorius | flexes hip and knee; laterally rotates hip |
| action of the biceps femoris | extends hip, flexes knee |
| action of the semitendinosus | extends hip, flexes knee |
| action of the tibialis anterior | dorsiflexion and inversion of foot at ankle |
Created by:
dglenn34
Popular Anatomy sets