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y YE4 Y, e . Muscles of the Trunk Correcy ide yi i i u ntify both intact and transected (¢ t) muscles depicted in tt Review Sheet 13 225 1@ illustration, using the key given at the right Key: a. biceps brachii (cut) b. deltoid external intercostals d. external oblique e. internal oblique f. pectoralis major g. pectoralis minor h. rectus abdominis i. serratus anterior ]. trapezius Using the key provided in question 5 above, identify the major muscles described below. 1. a major flexor of the vertebral column 2. prime mover for forearm flexion 3. prime mover for arm flexion 4. assume major responsibility for forming the abdominal wall (three pairs of muscles) 5. prime mover of arm abduction 6. with ribs fixed, pulls scapula forward and downward 7. moves the scapula forward and rotates scapula upward 8. small, inspiratory muscles between the ribs; elevate the rib cage 9. extends the head