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Anterior Trunk

QuestionAnswer
A major spine flexor; the name means "straight muscle of the abdomen" Rectus Abdominus
prime mover for shoulder flexion and adduction (back to body) Pectoralis Major
prime mover for shoulder abduction (away from body) Deltoid
forms the external lateral walls of the abdomen external obliques
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" Serratus Anterior
four muscle pairs that together from the so-called abdominal girdle Transverse Abdominus, Rectus Abdominus, External Obliques, and Internal Obliques
a tendinous "seam" running from the sternum to the pubic symphysis that indicates the midline point of fusion of the abdominal muscle sheaths linea alba
the deepest muscle of the abdominal wall Transversus Abdominus
deep muscles of the thorax that promote the inspiratory phase of breathing External Intercostals
an unpaired muscle that acts in concert with the External Obliques 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
Created by: alyssa_yocom