Babinski response
An important neurologic examination based upon what the big toe does when the sole of the foot is stroked. If the big toe goes up, that may mean trouble. The Babinski response is obtained by stimulating the external portion (the outside) of the sole. The examiner begins the stimulation back at the heel and goes forward to the base of the toes. There are diverse ways to elicit the Babinski response. A useful way that requires no special equipment is with firm pressure from the examiner's thumb. Just stroke the sole firmly with the thumb from back to front along the outside edge. Too vigorous stimulation may cause withdrawal of the foot or toe, which can be mistaken as a Babinski response. The normal mature Babinski response also by fanning of the other toes. Most newborn babies are not neurologically mature so they show a Babinski response. Upon stimulation of the sole, they extend the great toe. Many young infants do this, too, and it is perfectly normal. However, in time during infancy the Babinski response vanishes and, under normal circumstances, should never return. A Babinski response in an older child or adult is abnormal. It is a sign of a problem in the central nervous system (CNS), most likely in a part of the CNS called the pyramidal tract. Asymmetry of the Babinski response — when it is present on one side but not the other — is abnormal. It is a sign not merely of trouble but helps to lateralize that trouble (tell which side of the CNS is involved). The Babinski response is known by a number of other names: the plantar response (because the sole is the plantar surface of the foot), the toe or big toe sign or phenomenon, and the Babinski reflex, rsign or phenomenon. It is wrong to say that the Babinski response is positive or negative; it is present or absent. Babinski, despite the Slavic sound of the name, was French: Joseph Francois Felix Babinski (1857-1932). His name will not soon be forgotten in medicine, thanks to the reflex he described.

Medical dictionary. 2011.

Look at other dictionaries:

  • Response, Babinski — A neurologic reflex that constitutes an important medical examination based, believe it or not, upon what the big toe does when the sole of the foot is stroked. If the big toe goes up, that may mean trouble. The Babinski response is obtained by… …   Medical dictionary

  • Babinski reflex — An important neurologic test based, believe it or not, upon what the big toe does when the sole of the foot is stimulated. If the big toe goes up, that may mean trouble. The Babinski reflex is obtained by stimulating the external portion (the… …   Medical dictionary

  • Babinski phenomenon — A neurologic reflex that constitutes an important medical examination based upon what the big toe does when the sole of the foot is stroked. If the big toe goes up, that may mean trouble. The Babinski reflex is obtained by stimulating the… …   Medical dictionary

  • Babinski sign — An important neurologic examination based upon what the big toe does when the sole of the foot is stimulated. If the big toe goes up, that may mean trouble. The Babinski sign is obtained by stimulating the external portion (the outside) of the… …   Medical dictionary

  • Response, plantar — The plantar response, also known as the Babinski response, is an important neurologic examination based upon what the toes do when the sole (the plantar surface) of the foot is stroked. If the big toe goes up, that may mean trouble. The plantar… …   Medical dictionary

  • Babinski sign — noun extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of two years but a sign of brain or spinal cord injury in older persons • Syn: ↑Babinski,… …   Useful english dictionary

  • Babinski — noun extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of two years but a sign of brain or spinal cord injury in older persons • Syn: ↑Babinski… …   Useful english dictionary

  • Babinski reflex — noun extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of two years but a sign of brain or spinal cord injury in older persons • Syn: ↑Babinski,… …   Useful english dictionary

  • Reflex, Babinski — An important neurologic test based, believe it or not, upon what the big toe does when the sole of the foot is stimulated. If the big toe goes up, that may mean trouble. The Babinski reflex is obtained by stimulating the external portion (the… …   Medical dictionary

  • Sign, Babinski — A neurologic reflex that constitutes an important medical examination based upon what the big toe does when the sole of the foot is stroked. If the big toe goes up, that may well mean trouble. The Babinski sign is obtained by stimulating the… …   Medical dictionary

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