QS Study

Babinski’s Sign

Normally corticospinal tract produces plantar flexion of all toes in response to sensory stimulation of skin of the sole which has a great importance in walking. But in the case of upper motor neuron lesion or pyramidal lesion, the response becomes reversed. That is scratching of the sole causes the dorsiflexion of the great toe and the fanning of other toes. This is called Babinski’s sign. This sign also refers to a reflex of the forearm and indicates a lesion of the spinal cord. In adults, the Babinski Sign can indicate upper motor neuron diseases, such as lesions, which affect the corticospinal tract. ost newborn babies are not neurologically mature so they normally show a sign.

It also occurs in the baby during the first year of life because the corticospinal tract or pyramidal tract is not myelinated (developed) until the end of 1st year of life. It is a foot reflex that happens naturally in babies and young children until they’re about 6 months to 2 years old. This reflex is usually tested by doctors by stroking the sole of the foot. If the Babinski sign is still noticeable beyond that, it likely indicates neurological problems. The Babinski reflex is never a normal finding in adults. Babinski’s test is running a pointed instrument up the lateral border of the foot and crossing to the medial side over the metatarsal pads.