Muscles and Their Actions Practice Questions

Question 1

All of the following muscles have dual nerve supply, EXCEPT?

Accepted Answer

Flexor digitorum superficialis

Answer

Flexor digitorum profundus

Answer

Pectineus

Answer

Brachialis

Question 2

Trendelenburg's sign is positive in injury to which structure?

Accepted Answer

Gluteus medius

Answer

Gluteus maximus

Answer

Quadriceps femoris

Answer

Quadratus lumborum

Question 3

Which of the following structures is supplied by the superior gluteal nerve?

Accepted Answer

Gluteus minimus

Answer

Gluteus maximus

Answer

Piriformis

Answer

All of the options

Question 4

What is the condition commonly known as jumper's knee?

Accepted Answer

Patellar tendonitis due to overuse of the patellar tendon.

Answer

Inflammation of the patellar tendon at its insertion on the patella.

Answer

Tendinopathy of the quadriceps tendon.

Answer

Injury to the hamstring tendon.

Question 5

Injury at which of the following marked sites on the leg causes failure of dorsiflexion?

Accepted Answer

Lateral aspect of the leg (site 3)

Answer

Anterior aspect of the thigh (site 1)

Answer

Medial aspect of the leg (site 4)

Answer

Posterior aspect of the thigh (site 2)

Question 6

Trendelenberg test is negative in

Accepted Answer

Normal hip function

Answer

Polio myelitis

Answer

Inferior Gluteal nerve

Answer

Superior Gluteal nerve

Question 7

Which of the following muscles is not supplied by the femoral nerve?

Accepted Answer

Obturator externus

Answer

Pectineus

Answer

Sartorius

Answer

Vastus medialis

Question 8

The mechanism of action of botulinum toxin A is best described by:

Accepted Answer

Presynaptic blockade of acetylcholine release

Answer

Slowing of myelinated nerve fiber transmission

Answer

Postsynaptic receptor blockade

Answer

Acetylcholinesterase inhibition

Question 9

Name the marked structure in the image.

Accepted Answer

Gracilis

Answer

Vastus lateralis

Answer

Rectus femoris

Answer

Vastus medialis

Question 10

Identify the function of the muscles marked in red:

Accepted Answer

Flexion at MCP joint

Answer

Flexion at IP joint

Answer

Extension at MCP joint

Answer

Abduction at MCP joint

Muscles and Their Actions — MCQs

Muscles and Their Actions — MCQs

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