To test for the presence of an upper motor neuron lesion. This test is part of the standard neurological examination.
Patient positioned in sitting or supine. The examiner grasps the lower leg with one hand.
Using either the opposite end of a reflex hammer or thumbnail, the examiner uses his/her other hand to scratch along the crest of the patient's tibia in a downward motion.
- A normal (negative) response is no reaction
- An abnormal (positive) response is a Plantar Response/Babinksi Sign, that being great toe extension and fanning of the other toes
- Magee DJ (2014). Orthopedic Physical Assessment (6th Ed): pg 597.
- https://www.youtube.com/watch?v=TfrGYDIB_PE (Accessed Feb 19, 2016)