Tibial nerve

TIBIAL NERVE

Q. 1

Nerve supply of adductor magnus is through:

 A

Tibial part of sciatic nerve

 B

Obturator nerve

 C

Both

 D

None

Q. 1

Nerve supply of adductor magnus is through:

 A

Tibial part of sciatic nerve

 B

Obturator nerve

 C

Both

 D

None

Ans. C

Explanation:

Innervation of adductor magnus

  • Posterior division of obturator nerve innervates most of the adductor magnus
  • Vertical or hamstring portion innervated by tibial nerve (L2, L3, L4)

Q. 2

Nerve Supply of the Muscle marked as Muscle A in the diagram is 

 A

Tibial part of sciatic nerve

 B

Obturator nerve

 C

Both

 D

None

Q. 2

Nerve Supply of the Muscle marked as Muscle A in the diagram is 

 A

Tibial part of sciatic nerve

 B

Obturator nerve

 C

Both

 D

None

Ans. C

Explanation:

Innervation of adductor magnus

  • Posterior division of obturator nerve innervates most of the adductor magnus
  • Vertical or hamstring portion innervated by tibial nerve (L2, L3, L4)

Q. 3

True about popliteus are all except‑

 A

Flexor of knee

 B

Intracapsular origin

 C

Supplied by tibial nerve

 D

Causes locking of knee

Q. 3

True about popliteus are all except‑

 A

Flexor of knee

 B

Intracapsular origin

 C

Supplied by tibial nerve

 D

Causes locking of knee

Ans. D

Explanation:

Popliteus

Popliteus is a deep muscle of posterior compartment of leg.

Features of popletius are –

Origin

  • Lateral surface of lateral condyle of femur, origin is intracapsular.
  • Outer margin of lateral meniscus of knee.

Insertion

  • Posterior surface of shaft of tibia above soleal line.

Nerve supply

  • Tibial nerve

Action

  • Ulocks knee joint by lateral rotation of femur on tibia prior flexion.
  • Accessory flexor of knee.


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