stereognosis
Pronunciation: ster-ee-og-NO-sis
The ability to identify objects through touch without visual input, testing parietal lobe function.
Full Definition
Stereognosis is the neurological ability to perceive and recognize the form of solid objects through tactile manipulation without the aid of vision. This complex sensory function requires intact primary tactile sensation, proprioception, and cortical integration, primarily in the parietal lobe. Testing stereognosis involves having patients identify common objects (coins, keys, paper clips) placed in their hands while their eyes are closed. Impairment of this function, called astereognosis, suggests parietal lobe lesions, particularly in the postcentral gyrus or superior parietal lobule.
Usage
Usage note: Test only after confirming intact primary sensation to avoid false positives.
In Context
- "Stereognosis testing revealed intact parietal lobe function bilaterally." — Sensory examination documentation
- "Loss of stereognosis in the left hand suggested a right parietal lesion." — Stroke assessment report