MSK (muscles for ortho theatre)

Question 1

Name the muscles shown in the anterior compartment of the thigh:

Which nerve are these muscles innervated by?

5 of these muscles collectively work to move the knee and the other 2 work to move the hip. What movements are these on the knee/hip joint?

Answer 1

Femoral nerve

Knee extension & hip flexion

Question 2

Name the muscles shown in the medial compartment of the thigh:

Which nerve are these muscles innervated by?

What action do these muscles all collectively work to exert?

Answer 2

Obturator nerve

Hip adduction

Question 3

Name the muscles shown in the posterior compartment of the thigh:

Which nerve are these muscles innervated by?

What action do these muscles all collectively work to exert?

Answer 3

Sciatic nerve
Hip extension & knee flexion

Question 4

Name the muscles shown in the anterior compartment of the leg:

Which nerve are these muscles innervated by?

What action do these muscles all collectively work to exert?

Answer 4

Deep fibular nerve
Dorsiflexion & inversion of the foot

Question 5

Name the muscles shown in the lateral compartment of the leg:

Which nerve are these muscles innervated by?

What action do these muscles all collectively work to exert?

Answer 5

Superficial fibular nerve
Eversion of the foot

Question 6

Footdrop is a clinical sign that refers to an inability to dorsiflex the foot at the ankle joint. The muscles located in which compartment of the leg would be responsible for a footdrop?

Answer 6

The anterior compartment

Question 7

The posterior compartment of the leg contains 7 muscles and is further subdivided into superficial and deep.

Which nerve are these muscles collectively innervated by?

What action do these muscles all collectively work to exert?

Answer 7

Tibial nerve
Plantarflexion and inversion of the foot

Question 8

Name the muscles located in the superficial part of the posterior compartment of the leg:

Which nerve are these muscles innervated by?

What action do these muscles all collectively work to exert?

Answer 8

Tibial nerve
Plantarflexion of the foot

Question 9

Name the muscles located in the deep part of the posterior compartment of the leg:

Which nerve are these muscles innervated by?

What action do these muscles all collectively work to exert?

Answer 9

Tibial nerve
Plantarflexion & inversion of the foot (flexor digitorum longus + flexor hallucis longus flex the toes)