- illusory displacement of limbs
- A term used to denote an illusory sensation in which a paralytic limb is perceived as being detached from the rest of the body. This phenomenon has been described in cases of hemi-plegia. As noted by the British neurologist Macdonald Critchley (1900-1997), illusory displacement of paralysed limbs is associated with lesions affecting the parietal lobe. As he maintains, "The patient may entertain that one of his limbs is completely detached from his own body and occupies some position nearby or afar. Or the patient may imagine his affected limb to be moving when it is actually immobile. Such an idea may be illusory or delusional; it can occur in episodic fashion, or it can be continual." Illusory displacement of limbs is usually classified as a variant of the group of " body schema illusions. Conceptually as well as phenomenologically, the condition would seem to lie on a continuum with neglect, "personification, and "illusory movement of limbs.ReferencesCritchley, M. (1965). Disorders of corporeal awareness in parietal disease.In: The body percept. Edited by Wapner, S., Werner, H. New York, NY: Random House.
Dictionary of Hallucinations. J.D. Blom. 2010.