Cuestionario: Lower Limb Anatomy and Biomechanics — 8 preguntas

1. What is the primary function of the anterior cruciate ligament in the knee?

A. Secures lateral stability of the knee

B. Prevents posterior displacement of the tibia

C. Prevents anterior displacement of the tibia

D. Supports the posterior capsule

Answer: (C)

Explicación

The anterior cruciate ligament provides stability during knee flexion by preventing anterior displacement of the tibia.

2. Which muscle from the ischio-jambiers group acts as a knee flexor?

A. Biceps femoris long head

B. Vastus medialis

C. Rectus femoris

D. Vastus lateralis

Answer: (A)

Explicación

The biceps femoris long head, part of the ischio-jambiers group, acts as a knee flexor according to the source.

3. What is hip flexion?

A. The movement that increases the angle between the thigh and the pelvis, moving the leg backward

B. The movement that brings the leg toward the midline

C. The movement that moves the leg away from the body's midline

D. The movement that decreases the angle between the thigh and the pelvis, lifting the leg forward

Answer: (D)

Explicación

Hip flexion is the movement that decreases the angle between the thigh and the pelvis, primarily involving muscles that lift the leg forward, as defined in the source.

4. What is the 'Ligt croisé' in the context of knee anatomy?

A. A ligament connecting the tibia to the fibula

B. A ligament that attaches the menisci to the tibia

C. A ligament that stabilizes the patella

D. A ligament connecting the femur to the tibia that is intracapsular but extrasynovial

Answer: (D)

Explicación

The 'Ligt croisé' are intracapsular but extrasynovial ligaments connecting femoral condyles to the tibial intercondylar fossae, helping stabilize the knee during movement.

5. What is the proximal tibio-fibular joint?

A. A synovial joint with high mobility and no ligament reinforcement

B. An arthrodial joint with limited mobility involving a capsule and ligaments

C. A ball-and-socket joint allowing extensive movement

D. A hinge joint primarily for flexion and extension

Answer: (B)

Explicación

The proximal tibio-fibular joint is an arthrodial joint characterized by limited mobility, involving a capsule and reinforced by anterior and posterior tibio-fibular ligaments.

6. Which statement matches the topic "Foot osteology and plantar arches for weight distribution"?

A. Talus bone : a tarsal bone with a narrowed neck and a trochlea that forms the ankle mortise with the tibial and fibular malleoli, playing a central role in ankle articulation

B. Fémoro-patellaire articulation : a joint between the femoral trochlea and the posterior surface of the patella, also with plane surfaces that are non-congruent, resulting in a less precise…

C. Ligament croisé antérieur : a ligament that provides stability during knee flexion, preventing anterior displacement of the tibia relative to the femur

D. Fémoro-tibial articulation : a hinge joint formed by the femoral condyles and the tibial plateaus, characterized by plane articular surfaces that are non-congruent, meaning they do not fit…

Answer: (A)

Explicación

This statement comes directly from the course section dedicated to this topic: Talus bone : a tarsal bone with a narrowed neck and a trochlea that forms the ankle mortise with the tibial and fibular malleoli, playing a central role in ankle articulation.

7. What does forced abduction (eversion) of the ankle primarily risk damaging?

A. The medial and lateral malleoli and their collateral ligaments

B. The Achilles tendon and plantar fascia

C. The tibial nerve and posterior tibial artery

D. The anterior talofibular ligament only

Answer: (A)

Explicación

Forced abduction (eversion) can cause bimalléolar fractures involving both medial and lateral malleoli and their collateral ligaments, indicating these structures are vulnerable during such movement.

8. Which muscles insert on the calcaneus via the Achilles tendon?

A. Tibialis anterior and long fibular muscles

B. Short extensor muscles of the toes

C. Gastrocnemius and soleus muscles

D. Peroneus muscles

Answer: (C)

Explicación

The gastrocnemius and soleus muscles, which make up the triceps surae group, insert on the calcaneus via the Achilles tendon, making them the key muscles involved in powerful plantar flexion of the foot.