Duchenne’s test is an ankle examination procedure that tests for superficial peroneal nerve lesion, L4 – S1 nerve root lesion.


Patient should be awake and cooperative for a Duchenne’s test.

  1. Patient may be seated or supine while the test is done.
  2. The examiner applies an upward force to the head of the first metatarsal while the patient attempts to plantar flex the foot.
  3. The examiner checks for supination of the foot.

Upward force to the head of the metatarsal is applied.


Positive Duchenne’s Test

A positive Duchenne’s Test is when there is supination of the foot with attempted plantar flexion. This is very relevant as the medial border of the foot dorsiflexes and the lateral border of the foot plantar flexes.

This sign indicates superficial peroneal nerve lesion, L4-S1 nerve root lesion.