- illusory arm extension
- The term illusory arm extension refers to a subclass of the "motor illusions, which is itself a subclass of the group of "illusory movement experiences. The phenomenon of illusory arm extension can be induced by means of vibratory stimulation of the biceps tendon of a bent and immobilized arm in a blindfolded test person. This procedure typically produces a tonic vibration reflex, followed by an illusory feeling of movement around the elbow, followed by the " kinaesthetic illusion of extending the lower arm into extracorporeal space. A variant of the illusory arm extension is known as "Pinocchio illusion. The mediation of both types of motor illusion is attributed to the interplay between basic sensorimotor impulses (involving patterns of alpha and gamma motoneuron activity, muscle spindle discharge level, and the resulting movements of the arm), and higher cognitive and affective processes as represented by parietal brain areas involved with bodily representations and/or representations of movement. The illusory arm extension may also be classified as a vibration-induced "phantom illusion or as a "body schema illusion.ReferencesBurrack, A., Brugger, P. (2005). Individual differences in susceptibility to experimentally induced phantom sensations. Body Image,2, 307-313.Jones, L.A. (1988). Motor illusions: What do they reveal about proprioception? Psychological Bulletin, 103, 72-86.Lackner, J.R. (1988). Some proprioceptive influences on the perceptual representation ofbody shape and orientation. Brain, 111, 281-297.
Dictionary of Hallucinations. J.D. Blom. 2010.
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illusory movement experience — Also known as illusory motor movement. Both terms refer to a hallucinated feeling of movement, such as the feeling of flying, falling, or floating, as well as elevator feelings, sensations of acceleration, and spinning sensations. Illusory… … Dictionary of Hallucinations
Pinocchio illusion — Also referred to as phantom nose illusion. The eponym Pinocchio illusion refers to Pinocchio, the protagonist of the childrens book The Adventures of Pinocchio by the Italian author Carlo Lorenzini, better known as Carlo Collodi (18261890). It … Dictionary of Hallucinations
kinaesthetic hallucination — Also known as kinesthetic hallucination, kinaesthetic illusion, and hallucination of motion. The term kinaesthetic hallucination is indebted to the Greek words kinèsis (movement) and aisthèsis (feeling). In a broad sense, it is used to denote… … Dictionary of Hallucinations
body schema illusion — Also known as body schema disturbance, *somato éidolie, *disorder of corporeal awareness, illusion of corporeal transformation, and illusion of corporeal displacement. All six terms are used to denote an illusory change in the size, relation,… … Dictionary of Hallucinations
motor illusion — Also known as motor sensation and illusory movement. The term motor illusion is indebted to the Latin noun motio, which means movement. It is used to denote a * kinaesthetic hallucination characterized by the illusory sensation of movement of… … Dictionary of Hallucinations
phantom illusion — The term phantom illusion is indebted to the Greek noun phantasma, which means ghost or spectre. It is used to denote the illusory alteration of the shape and/or orientation of the body, or parts thereof. As demonstrated in myriad experimental … Dictionary of Hallucinations
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