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Anatomy
Chapter 10 Packet
| Question | Answer |
|---|---|
| a major spine flexor, the name means "straight muscle of the abdomen" | rectus abdominus |
| prime mover for shoulder flexion and adduction | pectoralis major |
| prime mover for shoulder abduction | deltoid |
| forms the external lateral walls of the abdomen | external oblique |
| acting alone, each muscle of this pair turns the head toward the opposite shoulder | sternocleidomastoid |
| prime mover to protract and hold the scapula against the thorax wall, the "boxer's muscle" | seratus anterior |
| four muscle pairs that together form the so called abdominal girdle | tranversus abdominus, external oblique, internal oblique, rectus abdominus |
| tendinous "seam" running from the sternum to the pubic symphysis that indicates the midline point of fusion of the abdominal muscle sheaths | linea alba |
| deepest muscle of the abdominal wall | transversus abdominus |
| deep muscles of the thorax that promote the inspiratory phase of breathing | external intercoastals |
| an unpaired muscle that acts in concert with the muscles name immediately above to accomplish inspiration | diaphragm |
| a flat, thoracic muscle deep to the pectoralis major that acts to draw the scapula inferiorly or to elevate the rib cage | pectoralis minor |
| muscle that enables you to shrug your shoulders or extend your head | trapezius |
| muscle that adducts the shoulder and causes the extension of the shoulder joint | latissmus dorsi |
| shoulder muscle that is the antagonist of the latissmus dorsi | deltoid |
| prime mover of back extension; a composite muscle consisting of three columns | erector spinae |
| 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 | rhomboids |
| synergist of the trapezius in scapular elevation; acts to flex the head to the same side | levator scapulae |
| synergist of latissmus dorsi in extension and adduction of the humerous | supraspinatus |
| rotator cuff muscle; rotates the humerus laterally | infraspinatus |
| rotator cuff muscle; lies immediately inferior to the infraspinatus | terres minor |
| muscle that holds the scapula tightly against the thorax wall | serratus anterior |
| kite-shaped muscle pair that elevates, stabilizes, and depresses the scapulae | trapezius |
| small rectangular muscles that square the shoulders as they act together to retract the scapula | rhomboids |
| small muscle pair that elevates the scapulae | levator scapulae |
| two paired muscles forming the bulk of the pelvic diaphragm | coccygeus, levator ani |
| muscles that form the urogenital diaphragm | deep transverse perineal muscle |
| muscles forming the superficial space | bulbospongiosus, ischiocavernosus,superficial transverse perineal muscle |
| muscle that constricts the urethra | external urethral sphincter |
| empties the urethra; assists in penile erection | bulbospongiosus |
| the most important muscle pair in supporting the pelvic viscera; forms sphincters at the anorectal junction | levator ani |
| retards venous drainage and helps maintain penile erection | ischiocavernosus |
| elevates the first two ribs | scalenes |
| prime mover of back extension; consists of three muscle columns (iliocostalis, longissimus, and spinalis) | 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 torticolis | splenius |
| acting together, the pair extends the head, one rotates the head and bends it laterally. | sternoclediomastoid |
Created by:
csouder