Deck 10: The Lower Limb

Question 1

The sacral plexus is formed by the anterior primary rami of which spinal nerves?

A) T1 and T2
B) C1 to C4
C) C5 and T1
D) S1 and L1-L4
E) S1 to S4, L4, and L5

Answer 1

E
S1 to S4, L4, and L5. The sacral plexus arises from the anterior primary rami of spinal nerves L4 and L5 and S1, S2, S3, and S4.

Question 2

The talocrural joint is capable of which two movements?

A) Dorsiflexion and plantarflexion
B) Hyperextension and extension
C) Abduction and hyperextension
D) Flexion and abduction
E) Inversion and eversion

Answer 2

A
Dorsiflexion and plantarflexion. The talocrural (ankle) joint is capable of two movements. Dorsiflexion is the drawing up of the dorsum of the foot that allows the heel to strike the ground first. Plantarflexion is the opposite movement that points the foot downward. The intertarsal joint is capable of inversion and eversion of the ankle.

Question 3

Blood supply to the lower limb is provided through the _______ artery and its branches.

A) femoral
B) tibial
C) popliteal
D) fibular
E) plantar

Answer 3

A
Femoral. The femoral artery supplies the entire lower limb through its various branches, which are the popliteal, fibular, posterior tibial, and anterior tibial arteries.

Question 4

The _______ nerve, which is the largest nerve in the body, runs down the back of the thigh and then divides into two branches, the common fibular nerve and the tibial nerve.

A) pudendal
B) femoral
C) sciatic
D) obturator
E) peroneal

Question 5

In the knee, the condyles of the femur and tibia are partially separated by two fibrocartilaginous discs, the ___________________________________.

A) anterior and posterior acetabular labrum
B) medial and collateral ligaments
C) anterior and posterior bursae
D) medial and lateral menisci
E) synovial membranes

Question 6

The semitendinosus, semimembranosus, biceps femoris, and posterior portion of the adductor magnus muscles are colloquially referred to as ____________________.

A) calves
B) flexors
C) biceps
D) glutes
E) hamstrings

Question 7

The weight-bearing bone of the leg is the _________________________.

A) femur
B) tibia
C) fibula
D) patella
E) calcaneus

Question 8

The large bone of the thigh is the ___________________________.

A) tibia
B) os coxae
C) fibula
D) femur
E) coccyx

Question 9

All of the following muscles are involved in flexion of the hip except the __________.

A) iliacus
B) psoas
C) rectus femoris
D) soleus
E) sartorius

Question 10

The ________ is a sesamoid bone embedded within the tendon of the quadriceps femoris muscle. Its anterior surface is roughened for the tendinous attachments to the quadriceps femoris muscle.

A) tibia
B) fibula
C) femur
D) trochanter
E) patella