Review Note
Last Update: 10/26/2023 02:09 AM
Current Deck: AA Physical Therapy 1st Year Fall::Anatomy::Quiz/Test Questions::Unit 2
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Question
In an accident involving farm machinery, a farmer recieves a cut on the dorsum of his ankle. As you inspect the wound and test for functional and sensory deficits, you find that no tendons have been cut, but the dorsalis pedis artery and the accompanying nerve have been cut. You would expect to find:
Title
Anatomy
QType (0=kprim,1=mc,2=sc)
Q_1
club foot
Q_2
foot drop
Q_3
inability to extend the big toe
Q_4
numbness between the first and second toes
Q_5
weakness in inversion of the foot
Answers
0 0 0 1 0
Sources
The correct answer is: numbness between the first and second toes
The nerve running with the dorsalis pedis artery is the deep fibular nerve. This nerve innervates the anterior compartment of the leg and the extensors on the dorsum of the foot. At the point where it was cut, the nerve had already given off all its branches to the anterior compartment of the leg. So, the farmer should still be able to dorsiflex his foot (preventing foot drop), and all of the muscles that invert his foot should be intact. Although extensor hallucis brevis (on the dorsum of the foot) has been denervated, extensor hallucis longus is in the anterior compartment of the leg, and that muscle should still be able to extend the great toe. However, the deep fibular nerve would have been cut before it could supply fibers to the area of cutaneous innervation between the first and second toe. So, there would be numbness in that area of skin.
Club foot is a congenital anomaly which refers to a foot that has been twisted out of position. In cases of club foot, the foot is inverted, the ankle is plantarflexed, and the forefoot is adducted.
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