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222-227
study guide
| Question | Answer |
|---|---|
| a muscle that enables you to shrug your shoulders or extend your head | trapezius |
| a muscle that adducts the shoulder and causes extension of the shoulder joint | latissimus dorsi |
| the shoulder muscle that is the antagonist of the muscle described in question 2 above | deltoid |
| prime mover of back extension; a composite muscle consisting of three columns | erector spinea |
| a fleshy muscle forming part of the posterior abdominal wall that helps to maintain upright posture | quadratus lumborum |
| acting individually small rectangular muscles that rotate the glenoid cavity of the scapulae inferiorly | romboids |
| synergist of the trapezius in scapular elevation; acts to flex the head to the same side | levator scapulae |
| synergist of latissimus dorsi in extension and adduction of humerus | teres major |
| a rotator cuff muscle; prevents downward dislocation of the humerus | supraspinatus |
| a rotator cuff muscle; rotates the humerus laterally | infraspinatus |
| a rotator cuff muscle; lies immediately inferior to the infraspinatus | teres minor |
| muscle that holds the scapula tightly against the thorax wall | serratus anterior |
| kite-shaped muscle pair that elevates, stabilies and depresses the scapulae | trapezius |
| small rectangular muscles that squarethe shoulders as they act together to retract the scapula | rhomboids |
| small muscle pair that elevates the scapulae | levator scapulae |
| two paired muslces forming the bulk of the pelvic diaphram | coccygeus, levator ani |
| muscles that form the urogenital diaphragm | deep transverse perineal muscle, external urethral sphincter |
| muscles forming the superficial space | bulbospongiosus, ischiocavernosus, superficial transverse perineal muscle |
| a muscle that constricts the urethra | external urethral sphincter |
| empties the uretra assists in penile erection | bulbospongiosus |
| the most important muscle pair in supporting the pelvic visera; forms sphincters at the anorectal junction | levator ani |
| retards venous drainage and helps maintain penile erection | ischiocanvernosus |
| elevates the first two ribs | scalenes |
| prime mover of back extension; consists of three muscle columns | erector spinae |
| one flexes the vertebral column laterally; the pair extends the lumbar spine and fixes the 12th rib | quadratus lumborum |
| extends the vertebral column and head and rotates them to the opposite side | semispinalis |
| prime mover of head flexion; spasms of one causes torticollis | splenius |
| acting together the pair extends the head; one rotates the head and bends it laterally | sternocleidomastoid |
| acts with other muscles in for to accomplish inspiration | diaphragm |
| elevates the scapula; acts to flex the head to the same side of the body | levator scapulae |
| helps to maintain and upright posture | quadratus lumborum |
| prime mover of shoulder abduction when all the fibers contract | deltoid |
| adducts the shoulder and causes extension of the shoulder joint | latisimus dorsi |
| prime mover of head flexion; extends or hyperextends the head | splenius |
| the deepest muscle in the abdominal wall that compresses abdominal contents | transversus abdominis |
| a tendons seam that runs from the sternum to the pubic symphysis | linea alba |
| prime mover of back extension; consists of three muscle columns | erector spinea |
| a rotator cuff muscle that prevents downward dislocation of the humerus | supraspinatus |
| helps to shrug shoulders | trapezius |
| rectangular muscles that act to retract the scapula | rhomboids |
| muscle that holds the scapula tightly against the thorax wall | serratus anterior |
| muscles of the thorax that promote the inspiratory phase of breathing | intercostals |
| prime mover of shoulder flexion and adduction; rotates arm medially | pectoralis major |
Created by:
Hvillain20