1. Mader Study Questions 11-15
Muscular System
Mader
Study Questions 11-15

2. 11. Which muscles of the neck & trunk flex & extend the head? (p. 121)
Table 7.3
Sternocleidomastoid (named for attachments) on either side of the neck flex and head is bent towards the chest
Flex only one sternocleidomastoid and the head bends to opposite side
Trapezius muscles extend the neck

3. 12. What are the muscles of the abdominal wall? (p. 122)
Rectus abdominalis – from pubic bones to ribs & sternum – compresses abdominal cavity and flexes vertebral column
External & internal obliques & transversus abdominalis are at a slant and fibers run perpendicular to each other between lower ribs and pelvic girdle
All tense and support the abdominal wall

4. 13. Name the muscles that move the humerus, and give their actions. (pp. 123, 125)
Table 7.4
Deltoid abducts (moves away from midline) the arm
Pectoralis major flexes the arm to raise it anteriorly, & adducts (moves towards midline) the arm pulling it across the chest
Latissimus dorsi (lateral and dorsal) extends and adducts the arm
Terres major – extends humerus or adducts & rotates arm medially

5. 14. Which of the muscles of the upper limb move the forearm, & what are their actions? Name the muscles that move the hand & fingers. (pp )
Biceps brachii – flexes forearm
Triceps brachii – extends forearm
Brachialis – flexex forearm
Extensor & flexor carpi – moves wrist & hand
Extensor & flexor digitorum – moves fingers

6. Illiopsoas – flexes thigh Gluteus maximus – extends thigh
15. Which of the muscles of the lower limb move the thigh, & what are their actions? (pp )
Illiopsoas – flexes thigh
Gluteus maximus – extends thigh
Gluteus medius – abducts (moves away from midline) thigh
Adductor group – adducts (towards midline) thigh

7. Quadriceps femoris group – extends lower leg
15. Which of the muscles of the lower limb move the lower leg, & what are their actions?
Quadriceps femoris group – extends lower leg
Hamstring group – flexes lower leg & extends hip
Sartorius – flexes, abducts & rotates leg

8. 15. Which of the muscles of the lower limb move the feet?
Gastrocnemius – plantar flexion joint) and eversion (sole outward) of foot
Tibalis anterior – dorsiflexion and inversion (sole inward) of foot
Peroneus group - plantar flexion and eversion of foot
Soleus – plantar flexes of foot