뒤로Anatomy & Physiology: Muscle Structure and Function
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이 집합의 용어 (27)
Circular muscles close or constrict an opening by contracting in a circular pattern.
Antagonists produce opposing actions, such as the biceps brachii flexing and the triceps brachii extending the arm.
Adduction moves a limb toward the body; abduction moves it away from the body.
Medial rotation turns a limb inward; lateral rotation turns it outward.
Originates on the frontal and maxillary bones, inserts on the eyelids; it circles the eye and closes the eyelids.
Run from the zygomatic bone to mouth corners; contraction raises the mouth corners to smile.
It circles the mouth and is responsible for pursing or closing the lips.
Originates on temporal and zygomatic bones, inserts on mandible; it closes the mouth during chewing.
Runs from sternum and clavicle to temporal and occipital bones; both sides flex the neck, one side turns head to opposite side.
Originates on occipital bone, C7, thoracic vertebrae; inserts on scapula and clavicle; it elevates and upwardly rotates the scapula.
Extends from chest to mandible; it tenses neck skin and pulls mouth corners down and back.
Runs from ribs 1–8 to scapula; it stabilizes the scapula against the body.
Attaches to sternum and clavicle, inserts on humerus; it adducts, medially rotates, and flexes the arm.
Runs from pubic bone to sternum and ribs 5–7; contraction flexes the trunk.
Originates on ilium and ribs 6–12, inserts on pubic crest and linea alba; it compresses the abdomen and aids trunk rotation.
Fibers run in opposing diagonal directions; both compress the abdominal wall and support lateral flexion and rotation.
Originates on thoracic and lumbar vertebrae and ilium, inserts on humerus; it adducts and extends the arm.
Attaches from scapula and clavicle to humerus deltoid tuberosity; its main action is arm abduction.
Supraspinatus initiates abduction; infraspinatus and teres minor laterally rotate the humerus.
Originates on humerus and scapula, inserts on ulna; it extends the arm at the elbow.
Biceps brachii flexes the elbow joint.
Anterior forearm muscles primarily flex the wrist and fingers; posterior forearm muscles primarily extend them.
Flexor carpi ulnaris flexes the wrist along the ulna side; flexor carpi radialis flexes the wrist along the radius side.
Attaches to palmar aponeurosis; it tenses the palm and weakly flexes the wrist.
Flexor digitorum superficialis flexes fingers 2–5; extensor digitorum extends fingers 2–5, making them antagonists.
Attaches to metacarpal 2; it extends the wrist.
Crosses the thigh and helps position the leg for sitting cross-legged by flexing, abducting, and laterally rotating the hip.