Babinski Sign Test

A positive Babinski sign refers to the abnormal response of the toes during the Babinski Sign Test, characterized by the extension of the big toe and fanning of the other toes, indicating underlying neurological dysfunction.

In Amyotrophic Lateral Sclerosis (ALS), the presence of the Babinski sign indicates upper motor neuron involvement, reflecting the degeneration of motor neurons within the corticospinal tract.

To check for the Babinski sign, a healthcare practitioner applies a firm stroke along the lateral aspect of the sole, from the heel to the ball of the foot, using a reflex hammer or similar instrument, and observes the patient's response.