PowerPoint® Lecture Slides prepared by Agnes Yard and Michael Yard C h a p t e r 11 The Muscular System: Appendicular Musculature PowerPoint® Lecture Slides prepared by Agnes Yard and Michael Yard Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings

The iliac crest and lateral surface of the anterior superior iliac spine are the sites of origin for which muscle? a. gluteus maximus b. gluteus minimus c. tensor fascia latae d. gluteus medius Answer: C

Which muscle originates along the entire length of the linea aspera of the femur, partially inserts into the patella, and acts as a knee extensor? a. vastus medialis b. vastus intermedius c. vastus lateralis d. rectus femoris Answer: A

Adduction and downward rotation of the scapula is the action of which of the following muscles? a. rhomboid minor b. serratus anterior c. rhomboid major d. a and c Answer: D

Which of the following muscles adducts the fingers at the metacarpophalangeal joints? a. adductor pollicis muscle b. palmar interossei muscle c. opponens pollicis muscle d. dorsal interossei muscle Answer: B

Which of the following muscles is located in the posterior compartment of the arm? a. brachialis b. triceps brachii c. brachioradialis d. coracobrachialis Answer: B

Which of the following is not a muscle that positions the pectoral girdle? a. subscapularis b. pectoralis minor c. serratus anterior d. subclavius Answer: A

Which of the following muscles is a medial rotator of the tibia? a. sartorius b. semimembranosus c. biceps femoris d. popliteus Answer: D

Which intrinsic muscle of the hand originates on the pisiform, and inserts at the proximal phalanx of the fifth digit? a. abductor pollicis brevis b. abductor digiti minimi c. flexor digiti minimi brevis d. opponens digiti minimi Answer: B

Which of the following intrinsic foot muscles has its origin on the cuboid and lateral cuneiform tarsal bones? a. adductor hallucis b. abductor hallucis c. flexor hallucis brevis d. flexor digiti minimi brevis Answer: C

Which muscle inserts on the radial tuberosity of the radius? a. brachialis b. biceps brachii c. brachioradialis d. anconeus Answer: B

The obturator externus muscle produces which type(s) of movement? a. lateral rotation at the hip joint b. medial rotation at the hip joint c. hip extension d. b and c Answer: A

Which of the following statements regarding the tibialis posterior muscle is incorrect? a. Its origin is on the interosseous membrane and adjacent shafts of the tibia and fibula. b. It facilitates inversion of the foot, and is innervated by the tibial branch (S1–S2) of the sciatic nerve. c. It inserts into the navicular, all three cuneiforms, the cuboid, and the second, third, and fourth metatarsal bones. d. It facilitates plantar flexion at the ankle, and is innervated by the tibial nerve (L4–S1). Answer: D

The obturator nerve innervates which compartment of the lower limb? a. anterior compartment b. posterior compartment c. medial compartment d. b and c Answer: C

The fascia of the forearm thickens on the posterior surface of the wrist to form a wide band of connective tissue known as: a. flexor retinaculum b. extensor aponeurosis c. extensor retinaculum d. palmar aponeurosis Answer: C

Which muscle does not insert on the vertebral border of the scapula? a. levator scapulae b. pectoralis minor c. rhomboid major d. serratus anterior Answer: B

Which muscle is innervated by special nerves from the sacral plexus (L5–S2)? a. quadratus femoris b. obturator externus c. obturator internus d. all of the above Answer: C

Which of the following muscles does not act to flex the elbow? a. anconeus b. biceps brachii c. brachialis d. brachioradialis Answer: A

The rectus femoris muscle, a knee extensor, is innervated by which nerve? a. tibial nerve b. sciatic nerve c. deep fibular nerve d. femoral nerve Answer: D

Which nerve(s) innervate(s) the superficial anterior compartment of the forearm? a. median nerve b. ulnar nerve c. radial nerve d. a and b Answer: D

The anterior superior iliac spine is the site of origin of which muscle? a. semitendinosus b. semimembranosus c. sartorius d. popliteus Answer: C

Regarding movement of the forearm, at which point are we the strongest? a. when flexing the elbow with the forearm pronated b. when flexing the elbow with the forearm supinated c. when extending the elbow with the forearm pronated d. when extending the elbow with the forearm supinated Answer: B

Which of the following statements regarding actions of muscles that move the arm is false? a. The infraspinatus muscle acts in lateral shoulder rotation. b. The subscapularis muscle acts in medial shoulder rotation. c. The teres major muscle acts in extension and lateral rotation at the shoulder. d. The teres minor muscle acts in lateral rotation and adduction at the shoulder. Answer: C

Which of the following is not a function of the plantar interossei muscle? a. extension at interphalangeal joints b. adduction of metatarsophalangeal joints of digits 2–5 of the foot c. flexion of metatarsophalangeal joints d. All of the above are functions of the plantar interossei muscle. Answer: B

The lateral circumflex femoral artery supplies which of the following lower limb compartments? a. posterior compartment of the thigh b. medial compartment of the thigh c. anterior compartment of the thigh d. all of the above Answer: C

Which of the following muscles inserts on the linea aspera and the adductor tubercle of the femur? a. adductor magnus b. adductor brevis c. adductor longus d. all of the above Answer: A