Answer: D) Sciatic Nerve

Explanation:

Sciatic nerve injury results in weakness in thigh extension, loss of flexion of the knee, and loss of all functions below the knee, along with sensory loss on the posterior thigh, leg (except the medial side), and foot.

Which nerve, when affected alone, is associated with weakness in flexion of the knee, weakness in plantar flexion, weakened inversion, and sensory loss on the leg (except medial) and plantar foot?

1. A) Tibial Nerve
2. B) Common Fibular Nerve
3. C) Femoral Nerve
4. D) Sciatic Nerve

Answer: A) Tibial Nerve

Explanation:

Tibial nerve injury, when affected alone, leads to weakness in flexion of the knee, weakness in plantar flexion, weakness in foot inversion, and sensory loss on the leg (except the medial side) and foot on plantar side.

What is the common fibular nerve’s most common site of damage, resulting in loss of dorsiflexion (“foot drop”), loss of eversion, and sensory loss on the lateral surface of the leg and the foot on dorsal side?

1. A) Behind the knee
2. B) Below the knee
3. C) At the neck of the fibula
4. D) Above the knee

Answer: C) At the neck of the fibula

Explanation:

The common fibular nerve is most commonly damaged at the neck of the fibula, resulting in the loss of dorsiflexion (“foot drop”), loss of eversion, and sensory loss on the lateral surface of the leg and the foot on dorsal side.

What nerve compression syndrome may occur when the common fibular nerve is compressed by the piriformis muscle, leading to motor and sensory loss in the lateral and anterior compartments of the leg?

A) Tibial Nerve Compression Syndrome
B) Femoral Nerve Compression Syndrome
C) Sciatic Nerve Compression Syndrome
D) Piriformis Syndrome

Answer:
D) Piriformis Syndrome

Explanation:
Piriformis Syndrome occurs when the piriformis muscle, located in the gluteal region, compresses the sciatic nerve. This compression can affect the components of the sciatic nerve, including the tibial and common fibular nerves, as they pass underneath or, in some cases, through the muscle. Symptoms include pain, tingling, and numbness in the buttocks that can extend down the leg, affecting the distribution of the sciatic nerve. The common fibular nerve, part of the sciatic nerve, may specifically be impacted, leading to symptoms in the lateral and anterior compartments of the leg, such as weakness in dorsiflexion and eversion of the foot.

While “sciatic nerve compression syndrome” could be considered a broad descriptor, “piriformis syndrome” is the correct and specific diagnosis when the piriformis muscle is the source of compression on the sciatic nerve.

What is the characteristic gait abnormality associated with superior gluteal nerve injury?

1. A) Steppage gait
2. B) Antalgic gait
3. C) Ataxic gait
4. D) Trendelenburg gait

Answer: D) Trendelenburg gait

Explanation:

Superior gluteal nerve injury results in a Trendelenburg gait, characterized by impaired gait with the inability to keep the pelvis level when standing on one leg.

Which nerve injury leads to “foot drop” and sensory loss on the lateral surface of the leg and the dorsum of the foot?

1. A) Tibial Nerve
2. B) Femoral Nerve
3. C) Common Fibular Nerve
4. D) Sciatic Nerve

Answer: C) Common Fibular Nerve

Explanation:

Damage to the common fibular nerve results in foot drop and sensory loss on the lateral surface of the leg and the dorsum of the foot.

Which nerve primarily supplies the lateral leg and the dorsum of the foot, excluding the first dorsal web space?

1. A) Deep Fibular Nerve
2. B) Sural Nerve
3. C) Tibial Nerve
4. D) Superficial Fibular Nerve

Answer: D) Superficial Fibular Nerve

Explanation:

With the exception of the first dorsal web space, which is supplied by the deep fibular nerve, the superficial fibular nerve supplies the lateral leg and the dorsum of the foot.

What nerve provides sensory innervation to the sole of the foot?

1. A) Saphenous Nerve
2. B) Deep Fibular Nerve
3. C) Tibial Nerve
4. D) Superficial Fibular Nerve

Answer: C) Tibial Nerve

Explanation:

The lateral and medial plantar branches of the tibial nerve supply sensory innervation to the sole of the foot.

Which nerve, formed by the combination of peroneal and tibial branches, supplies the posterior leg and lateral side of the foot?

1. A) Saphenous Nerve
2. B) Deep Fibular Nerve
3. C) Superficial Fibular Nerve
4. D) Sural Nerve

Answer: D) Sural Nerve

Explanation:The posterior leg and lateral side of the foot are supplied by the sural nerve, which is made up of a combination of tibial and peroneal branches.

The first dorsal web space of the foot is an exception and is supplied by which nerve?

1. A) Saphenous Nerve
2. B) Deep Fibular Nerve
3. C) Tibial Nerve
4. D) Superficial Fibular Nerve

Answer: B) Deep Fibular Nerve

Explanation:

The first dorsal web space of the foot is an exception and is supplied by the deep fibular nerve.

What is the origin of the saphenous nerve, which supplies the medial leg and medial foot?

1. A) Femoral Nerve
2. B) Tibial Nerve
3. C) Superficial Fibular Nerve
4. D) Sural Nerve

Answer: A) Femoral Nerve

Explanation:

The saphenous nerve, supplying the medial leg and medial foot, is a branch of the femoral nerve.

What nerve is commonly damaged following posterior hip dislocation, resulting in sensory and motor deficits in the posterior compartment of the thigh and leg?

1. A) Sural Nerve
2. B) Deep Fibular Nerve
3. C) Sciatic Nerve
4. D) Tibial Nerve

Answer: C) Sciatic Nerve

Explanation:

The sciatic nerve is commonly damaged following hip trauma and posterior dislocation, leading to sensory and motor deficits in the posterior compartment of the thigh, part of the leg and feet.

 What artery supplies the medial compartment of the thigh?

1. A) External iliac artery
2. B) Femoral artery
3. C) Obturator artery
4. D) Perforating artery

Answer: C) Obturator artery

Explanation: The obturator artery, a branch of the internal iliac artery (sometimes from the external iliac), supplies the medial compartment of the thigh.

Which artery supplies the head of the femur and is associated with avascular necrosis?

1. A) Medial circumflex femoral artery
2. B) Lateral circumflex femoral artery
3. C) Perforating artery
4. D) Popliteal artery

Answer: A) Medial circumflex femoral artery

Explanation: The medial circumflex femoral artery supplies the head of the femur and is linked to avascular necrosis.

What artery is responsible for supplying the knee joint?

1. A) Femoral artery
2. B) Profunda femoris artery
3. C) Lateral circumflex femoral artery
4. D) Popliteal artery

Answer: D) Popliteal artery

Explanation: The popliteal artery supplies the knee joint. It is a continuation of the superficial femoral artery and passes through the adductor hiatus to the posterior aspect of the knee, where it bifurcates into the anterior tibial and root trunk of the posterior tibial and peroneal arteries.

 Where can the dorsalis pedis artery pulse be palpated to assess the blood supply to the foot?

1. A) On the dorsum of the foot lateral to extensor hallucis longus tendon
2. B) Behind the ankle joint
3. C) On the medial side of the ankle
4. D) On the lateral side of the foot

Answer: A) On the dorsum of the foot lateral to extensor hallucis longus tendon

Explanation: The Dorsalis pedis artery pulse can be felt on the dorsum of the foot lateral to the extensor hallucis longus tendon.

Which artery courses with the tibial nerve in the posterior compartment of the leg and passes posterior to the medial malleolus?

1. A) Posterior tibial artery
2. B) Fibular artery
3. C) Lateral plantar artery
4. D) Medial plantar artery

Answer: A) Posterior tibial artery

Explanation: Following the tibial nerve in the leg’s posterior compartment, the posterior tibial artery travels posterior to the medial malleolus and terminates by giving off medial and lateral planter arteries.

What artery supplies the lateral compartment of the leg?

1. A) Tibial artery
2. B) Fibular artery
3. C) Lateral plantar artery
4. D) Medial plantar artery

Answer: B) Fibular artery

Explanation: The fibular artery ( a.k.a. the peroneal artery) supplies the lateral compartment of the leg. It is a posterior branch of the tibial-peroneal trunck

Which arterial arch is formed in the foot from the anastomosis of the lateral plantar and deep plantar artery?

A) Dorsalis pedis arterial arch
B) Plantar arterial arch
C) Lateral plantar arterial arch
D) Medial plantar arterial arch

Answer: B) Plantar arterial arch

Explanation: The plantar arterial arch is formed by the anastomosis of the lateral plantar and deep plantar artery (a branch of the dorsalis pedis).

Tibial shaft fractures can lead to lacerations of which arteries, causing compartment syndromes?

1. A) Anterior tibial arteries
2. B) Posterior tibial arteries
3. C) Fibular arteries
4. D) Both A and B

Answer: D) Both A and B

Explanation: Tibial shaft fractures can cause lacerations of both anterior and posterior tibial arteries, leading to anterior or posterior compartment syndromes.

Which artery courses with the deep fibular nerve in the anterior compartment of the leg?

1. A) Anterior tibial artery
2. B) Posterior tibial artery
3. C) Fibular artery
4. D) Dorsalis pedis artery

Answer: A) Anterior tibial artery

Explanation: The anterior tibial artery courses with the deep fibular nerve in the anterior compartment of the leg. It supplies the anterior compartment of the leg and becomes the dorsalis pedis artery at the ankle joint.

What vein accompanies the femoral artery through the adductor canal and is the continuation of the popliteal vein?

1. A) Greater saphenous vein
2. B) Lesser saphenous vein
3. C) Femoral vein
4. D) Anterior tibial vein

Answer: C) Femoral vein

Explanation: The femoral vein accompanies the femoral artery through the adductor canal and is the continuation of the popliteal vein.

Which vein is often used as a graft in coronary artery bypass surgery due to its long, straight course?

1. A) Popliteal vein
2. B) Greater saphenous vein
3. C) Fibular vein
4. D) Anterior tibial vein

Answer: B) Greater saphenous vein

Explanation: The greater saphenous vein is commonly used as a graft in coronary artery bypass surgery due to its long, straight course and accessibility.

What vein courses with the tibial nerve in the posterior compartment of the leg and drains into the popliteal vein?

1. A) Posterior tibial vein
2. B) Anterior tibial vein
3. C) Great saphenous vein
4. D) Lesser saphenous vein

Answer: A) Posterior tibial vein

Explanation: The posterior tibial vein courses with the posterior tibial artery in the posterior compartment of the leg and drains into the popliteal vein.

Which superficial vein runs along the medial aspect of the lower limb and is commonly used for venous cutdown procedures.?

1. A) Lesser saphenous vein
2. B) Popliteal vein
3. C) Great saphenous vein
4. D) Deep femoral vein

Answer: C) Great saphenous vein

Explanation: The great saphenous vein runs along the medial aspect of the lower limb and is commonly used for venous cutdown procedures.

In the popliteal fossa, which vein receives the small saphenous vein and becomes the femoral vein?

1. A) Anterior tibial vein
2. B) Posterior tibial vein
3. C) Popliteal vein
4. D) Deep femoral vein

Answer: C) Popliteal vein

Explanation: The popliteal vein receives the small saphenous vein in the popliteal fossa, continues in the adductor hiatus, and becomes the femoral vein at the adductor opening.

Which vein drains the lateral compartment of the leg and joins the popliteal vein?

1. A) Anterior tibial vein
2. B) Posterior tibial vein
3. C) Great saphenous vein
4. D) Lesser saphenous vein

Answer: D) Lesser saphenous vein

Explanation: The lesser saphenous vein (a.k.a. small or short saphenous vein) drains the lateral surface of the leg and courses up the posterior surface of the leg to join the popliteal vein.

Which deep vein runs posterior to the popliteal artery and is often implicated in deep vein thrombosis (DVT)?

1. A) Great saphenous vein
2. B) Popliteal vein
3. C) Anterior tibial vein
4. D) Posterior tibial vein

Answer: B) Popliteal vein

Explanation: The popliteal vein runs posterior to the popliteal artery and is a common site for deep vein thrombosis (DVT).

Which vein runs between the heads of the gastrocnemius muscle and drains into the popliteal vein?

1. A) Great saphenous vein
2. B) Small saphenous vein
3. C) Anterior tibial vein
4. D) Posterior tibial vein

Answer: B) Small saphenous vein

Explanation: The small saphenous vein runs on the posterior aspect of the calf, between the heads of the gastrocnemius muscle, and drains into the popliteal vein.

In the thigh, which vein accompanies the femoral artery and is often used for access during right heart catheterization?

1. A) Greater saphenous vein
2. B) Femoral vein
3. C) Popliteal vein
4. D) Anterior tibial vein

Answer: B) Femoral vein

Explanation: The femoral vein accompanies the femoral artery in the thigh and is commonly used for access during right heart catheterization.

In the ankle region, what vein runs posterior to the medial malleolus and joins the posterior tibial vein?

1. A) Great saphenous vein
2. B) Small saphenous vein
3. C) Deep femoral vein
4. D) Medial plantar vein

Answer: D) Medial plantar vein

Explanation: The medial and lateral plantar veins combine to form the posterior tibial vein, which enters the leg posterior to the medial malleolus.

Which vein courses with the dorsalis pedis artery in the anterior compartment of the leg, contributing to the venous drainage of the foot, ankle, ang the anterior leg?

1. A) Anterior tibial vein
2. B) Posterior tibial vein
3. C) Deep femoral vein
4. D) Lateral plantar vein

Answer: A) Anterior tibial vein

Explanation: The anterior tibial vein courses with the dorsalis pedis artery in the anterior compartment of the leg, contributing to the venous drainage of the foot, ankle, ang the anterior leg.