Definition

1. Noun:
   • A specific neurological reflex: The Babinski reflex is an automatic response where the big toe extends upward and the other toes fan out when the sole of the foot is firmly stroked along the outer edge from the heel to the ball of the foot. It is a standard clinical sign used in neurological examinations.

Usage

• The Babinski reflex is tested by a healthcare professional using a blunt instrument to stroke the foot.
• Its presence is considered normal in infants but is typically a sign of an upper motor neuron lesion in adults and children over the age of approximately two years.

Examples

• Noun:
  • The neurologist checked for the Babinski reflex to assess the patient's spinal cord function.
  • The presence of a Babinski reflex in the adult was a significant clinical finding.

Advanced Usage

• "Babinski sign": This is a synonymous term often used interchangeably with "Babinski reflex" in clinical settings to indicate the same physical finding.
  • A positive Babinski sign suggested possible damage to the corticospinal tract.

Variants and Related Words

• Babinski sign (n): A clinical term for the same reflex response. It is often used to emphasize the finding as an indicator of a neurological condition.
• Plantar reflex (n): The general category of reflex to which the Babinski belongs. A normal plantar reflex in an adult is the downward curling of the toes (the flexor response), which is the opposite of the Babinski.

Synonyms

• Babinski sign: The primary synonym used in medical diagnostics.
• Extensor plantar response: A more descriptive technical synonym emphasizing the upward (extensor) movement of the toes.

Notes on Meaning

• The meaning of the Babinski reflex is entirely medical and neurological. It does not have informal, idiomatic, or figurative uses. Its interpretation is strictly dependent on the age of the individual being examined.

Noun

1. 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