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CH 6 Anatomy Muscles
| Term | Definition |
|---|---|
| frontalis | cranial aponeurosis |
| orbicularis oculi | frontal bone and maxilla |
| orbicularis oris | mandible and maxilla |
| Temporalis | Temporal bone |
| zygomaticus | zygomatic bone |
| masseter | temporal bone |
| Buccinator | Maxilla and Mandible near molars |
| Sternocleidomastoid | sternum and clavicle |
| platysma | connective tissue covering the superior chest muscles |
| pectoralis major | Sternum, clavicle, and first to sixth ribs |
| rectus abdominis | pubis |
| External oblique | lower eight ribs |
| bicepts brachii | scapula of shoulder girdle |
| brachialis | distal humerous |
| ilopsoas | ilium and lumbar vertebrae |
| adductor muscles | pelvis |
| Sartorius | ilium |
| Vasti | femur |
| rectus femoris | pelvis |
| tibialis anterior | proximal tibia |
| extensor digitorum longus | proximal tibia and fibula |
| fibularis muscles | fibula |
| trapezius | occipital bone and all cervical and thoracic vertebrae |
| latissimus dorsi | lower spine and iliac crest |
| erector spinae | iliac cest, ribs 3-12, and vertebrae |
| quadratus lumborum | iliac crest, lumbar facia |
| deltoid | scapular and clavicle |
| tricepts brachii | shoulder girdle and proximal humerus |
| flexor carpi radialis | distal humerus |
| flexor carpi ulnaris | distal humerus and posterior ulna |
| flexor digitormu superficialis | distal humerus, ulna , and radius |
| extensor carpi radialis | humerus |
| extensor digitorum | distal humerus |
| gluteus maximus | sacrum and ilium |
| gluteus medius | ilium |
| hamstring muscles | ischial tuberosity |
| Gastrocnemius | distal femur |
| types of muscle | skeletal, smooth, cardiac |
| Muscle fibers | muscle cells |
| skeletal muscle | attach to skeleton |
| striated muscle | skeletal muscle |
| endomysium | surrounds each muscle fiber |
| perimysium | covers fascicle |
| fascicle | many fibers bundled together |
| epimysium | covers entire muscle |
| tendons | attach muscles to bone |
| smooth muscle | no striations, involuntary |
| cardiac muscle | found only in the heart |
| sarcolemma | many oval nuclei beneath the plasma membrane |
| myofibrils | ribbon like organells |
| I bands | actin, light band |
| A band | myosin, dark band |
| sarcomeres | chains of tiny contractile units |
| myofilaments | threadlike protein |
| thick filaments | myosin |
| cross bridges | link thick and thin myofilaments together |
| thin filaments | actin |
| sarcoplasmic reticulum | smooth endoplasmic reticulum |
| motor unit | one neuron and all the muscle cells it stimulates |
| axon | nerve fiber |
| neuromuscular junction | junction with the sarcolemma |
| when a muscle is unable to contract even though it is still being stimulated. | muscle fatigue |
| state of continuous partial contractions | muscle tone |
| flaccid | soft and flabby |
| flexion | angle of joint decreases |
| extension | angle of joint increases |
| rotation | movement around longitudinal axis |
| abduction | moving limb away from body |
| adduction | moving limb towards body |
| supination | turning backwards |
| pronation | turning forwards |
| fascicles are arranged in concentric rings | circular |
| fascicles converge toward a single insertion tendon | convergent |
| neck muscles | move head and shoulder girdle |
| trunk muscles | move vertebral column, ribs, head, arms, abdominal body wall. |
Created by:
2Shannonj
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