HSC 214 SUPERIOR MUSCLES QUESTIONS WITH CORRECT ANSWERS

ORIGIN: inferior border of ribs 1-11
INSERTION: superior border of ribs 2-12
ACTION(S): elevates ribs during inhalation
RELATIONSHIP: oblique muscle fibers that run toward the midline of the body (from
superior to inferior)


Give this one a try later!


external intercostals

,ACTION(S): extends elbow
RELATIONSHIP: has three heads (tri-)


Give this one a try later!


triceps brachii




ORIGIN: occipital bone and spinous processes (C7 - T1)
INSERTION: acromion and spina of the scapula
ACTION(S): elevates scapula, protracts scapula, depresses scapula
RELATIONSHIP: large, superficial kite shaped muscle of the back


Give this one a try later!


trapezius




ORIGIN: pubic symphysis and pubic crest
INSERTION: diploid process and costal cartilages of ribs 5-7
ACTION(S): flexes vertebral column
RELATIONSHIP: vertical muscle fibers on the anterior abdominal wall; encased in the
rectus sheath


Give this one a try later!


rectus abdominis

, ORIGIN: costal cartilage and ribs 5-12
INSERTION: linae alba and iliac crest
ACTION(S): Bilateral - flexes vertebral column; Unilateral - rotates vertebral column
RELATIONSHIP: oblique muscle fibers that run toward the midline of the body (from
superior to inferior)


Give this one a try later!


external oblique




ORIGIN: fascia of the upper thorax and lower neck
INSERTION: mandible
ACTION(S): depresses lower lip, depresses angle of the mouth
RELATIONSHIP: thin, flat muscle that gives the facial expression of "horror"


Give this one a try later!


platysma




ACTION(S): extends digit 1
RELATIONSHIP: deep to the extensor digitorum and lateral to the extensor indicis


Give this one a try later!


extensor pollicis longus