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Biol Psychiatry. 2000 Dec 1;48(11):1105-8.

Touch feel illusion in schizophrenic patients.

Author information

1
Institute for Psychiatric Studies, Sha'ar Menashe Mental Health Center, Hadera, Israel.

Abstract

BACKGROUND:

The rubber hand illusion is a tactile sensation referred to as an alien limb. The illusion has been explained by a spurious reconciliation of visual and tactile inputs reflecting functional connectivity in the brain and was used to explore alterations of functional connectivity in schizophrenia.

METHODS:

The rubber hand illusion was achieved when two paintbrushes simultaneously stroke the hand of the subject hidden from vision by a screen, as well as an artificial hand placed in view of the subject. The rubber hand illusion was assessed with a questionnaire affirming or denying the occurrence of the illusion.

RESULTS:

Schizophrenic subjects felt the illusion stronger and faster then did normal control subjects. Some rubber hand illusion effects correlated with positive symptoms of schizophrenia but not with negative symptoms.

CONCLUSIONS:

Altered functional integration of environmental inputs could constitute the basis for erroneous interpretations of reality, such as delusions and hallucinations.

PMID:
11094144
[Indexed for MEDLINE]

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