Individual differences in lateralisation of hallucinations associated with sleep paralysis

Laterality
Todd A Girard, J Allan Cheyne

Abstract

Individual differences were investigated in the lateralisation of two general categories of hypnagogic and hypnopompic hallucinations associated with sleep paralysis: (1) Vestibular-motor (V-M) hallucinations; comprising sensations of floating, flying, illusory locomotion and postural adjustments, out-of-body experiences (OBE), and autoscopy; and (2) Intruder hallucinations; incorporating a sense of the presence, and visual and auditory hallucinations of external, alien agents. Left-right lateralisation of such hallucinations, as well as handedness and footedness, were assessed in a diverse, nonclinical sample of 201 subjects participating in a web-based survey of sleep paralysis experiences. V-M hallucinations, but not Intruder hallucinations were predicted, based on the hypothesised distinctive neural sources of the different hallucinations, to be positively associated with handedness and footedness. Specifically, the predictions were based on the hypothesis that the activation of components of a vestibular, motor, and kinaesthetic bodily-self neuromatrix underlies V-M hallucinations, whereas a threat-activated vigilance system is responsible for Intruder hallucinations. As predicted, limb preferences were consistently found ...Continue Reading

Citations

Mar 31, 2006·Cognitive Neuropsychiatry·J A Cheyne, T A Girard
Mar 15, 2012·Cognitive Neuropsychiatry·Leanne K WilkinsJ Allan Cheyne
Dec 9, 2008·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Sally EastonChristine Mohr
Aug 17, 2006·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Peter BruggerTheodor Landis
Mar 6, 2007·Consciousness and Cognition·J Allan Cheyne, Todd A Girard
Nov 23, 2006·Neuropsychologia·Todd A GirardJ Allan Cheyne
Jan 28, 2006·Consciousness and Cognition·Fred H Previc
Sep 19, 2008·Consciousness and Cognition·Nirit Soffer-Dudek, Golan Shahar

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