Question

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

• A. 3
• B. 2
• C. 1
• D. 4

Answer 1

The Correct Option is A

Dorsiflexion is the action of raising the foot upwards towards the shin. This movement is primarily facilitated by muscles that are innervated by the deep fibular nerve, a branch of the common fibular nerve. An injury that impairs dorsiflexion is typically associated with damage to the common fibular nerve in particular, as it affects the muscles responsible for this action, such as the tibialis anterior.

Site	Injury Impact
1	Unrelated to dorsiflexion
2	Unrelated to dorsiflexion
3	Injury affects common fibular nerve, leading to failure of dorsiflexion
4	Unrelated to dorsiflexion

The correct answer is Site 3 because it involves the region where the common fibular nerve is susceptible to injury, affecting the ability to dorsiflex the foot.