spontaneous stereognosic sensation
   A term indebted to the medical term stereogno-sis, from the Greek words stereos (solid, tight, compact) and gnosis (insight), meaning the ability to identify solid objects through touch. The term spontaneous stereognosic sensation is used to denote a * stereognosic (or * tactile) hallucination mimicking the sensation of an object held in the palm of one's hand, when the hand is actually empty. The hallucinatory experience may be so vivid that the affected individual feels able to describe the object's size, shape, texture, and temperature. The occurrence of spontaneous stereognosic sensations is associated primarily with lesions affecting the sensory cortex. They should not be confused with *allachaesthesia and * phantom alloaesthesia.
   References
   Allen, I.M. (1928). Unusual sensory phenomena following removal of a tumour of the sensory cortex. Journal of Neurology and Psychopathology, 9, 133-145.
   Critchley, M. (1953). The parietal lobes. London: Edward Arnold & Co.

Dictionary of Hallucinations. . 2010.

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  • stereognosic sensation —    see spontaneous stereognosic sensation …   Dictionary of Hallucinations

  • stereognosic hallucination —    The term stereognosic hallucination is indebted to the medical termstereognosis, fromthe Greek words stereos (solid, tight, compact) and gnosis (insight), meaning the ability to identify solid objects through tactile sensation. The term stere… …   Dictionary of Hallucinations

  • tactile hallucination —    Also known as tactile phantasma, haptic hallucination, touch hallucination, and hallucination of touch. The term tactile hallucination is indebted to the Latin verb tangere, which means to touch. It refers to a bodily sensation seemingly… …   Dictionary of Hallucinations

  • phantom alloaesthesia —    Also known as phantom alloaesthesic sensation. Both terms stem from the Greek words phantasma (ghost, spectre), allos (other), and aisthanesthai (to notice, to perceive). They are used to denote a variant of alloaesthesia (i.e.… …   Dictionary of Hallucinations

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