The mental perception of depth or three-dimensionality by the senses, usually in reference to the ability to perceive the form of solid objects by touch.
- ‘Subtle signs of frontal lobe dysfunction may be demonstrated by testing stereognosis (such as the ability to identify an object placed in the patient's palm).’
- ‘Note that graphesthesia, stereognosis, and extinction cannot reliably be tested for unless primary sensation is intact bilaterally.’
- ‘This may indicate the possibility that oral stereognosis could enhance both the primary sensorimotor area and also other cerebral cortex regions associated with higher functions.’
- ‘Significant defects in graphesthesia and stereognosis occur with contralateral hemispheric disease, particularly in the parietal lobe (since this is the somatosensory association area that interprets sensation).’
Early 20th century from Greek stereos ‘solid’ + gnōsis ‘knowledge’.
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