- Also known as allocheiria. Both terms stem from the Greek words allos (other) and cheir (hand), translating loosely to 'other hand'. The term allochiria was introduced in or shortly before 1882 by the Austrian neuroanatomist and neuropathologist Heinrich Obersteiner (1847—1922) to denote a "confusion of sides", or a mislocation of sensory stimuli to the corresponding opposite half of the body. Allochiria has been observed mainly in the context of neglect, which is usually due to a lesion affecting the right parietal lobe. It has also been described in conditions such as tabes dorsalis and other myelopathies, in diffuse organic brain syndromes, in parieto-occipital tumours, and in hysteria. The majority of cases of allochiria are related to the tactile sense, but allochiric responses can occur in other sensory modalities as well. In * auditory allochiria, a person speaking from one side is responded to as if someone were speaking from the other side. In *visual or *optical allochiria, stimuli presented within one hemifield of vision are attributed to a source on the contralateral side. Allochiric responses have also been described in the sensory modalities of pain, pro-priocepsis, temperature, smell, and taste, as well as in reflex electrical movements. Conceptually as well as phenomenologically, allochiria is related to * allachaesthesia. The American neurologists Kimford Meador et al. have drawn attention to the original descriptions and word derivations of allochiria and allachaesthesia, identifying the work of the Welsh neurologist and psychoanalyst Alfred Ernest Jones (1879—1958) as the principal source of confusion in this matter. As Meador et al. point out, in 1907 Jones redefined both notions in an attempt to increase their diagnostic specificity, depicting both conditions as a positive indication of the presence of hysteria. Today allochiria is generally considered a variant or subset of allachaesthesia, and neither condition is now associated exclusively with hysteria. As Meador et al. recapitulate in their 1991 paper on the subject, "Allachaesthe-sia is a condition in which a sensory impression is mislocated to a remote position, and allochiria denotes mislocations to the corresponding opposite half of the body or space." Another condition phenomenologically related to allochiria is * spinal cord damage-induced synaesthesia. It is unlikely, however, that the two phenomena are related in a pathophysiological sense as well.ReferencesObersteiner, H. (1882). On allochiria. Brain,4, 153—163.Meador, K.J., Allen, M.E., Adams, R.J., Loring, D.W. (1991). Allochiria vs allesthesia. Is there a misperception? Archives of Neurology, 48, 546—549.
Dictionary of Hallucinations. J.D. Blom. 2010.
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allochiria — al·lo·chi·ria also al·lo·chei·ria .al ə kir ē ə n a condition associated with a central nervous lesion in which sensation is referred to a locus on the side of the body opposite to the place on which the skin is stimulated * * * al·lo·chi·ria… … Medical dictionary
allochiria — al·lo·chi·ria … English syllables
allochiria — … Useful english dictionary
allochiria, allocheiria — A form of allachesthesia in which the sensation of a stimulus in one limb is referred to the contralateral limb. SYN: allesthesia, alloesthesia, Bamberger sign (2). [allo + G. cheir, hand] … Medical dictionary
optical allochiria — see visual allachaesthesia … Dictionary of Hallucinations
allachaesthesia — Also known as allachesthesia, allesthesia, allaesthesia, allochaesthesia, allochesthesia, alloesthesia, and atopognosis. The term allachaesthesia comes from the Greek words allache (elsewhere) and aisthanesthai (to notice, to perceive). It… … Dictionary of Hallucinations
allesthesia — SYN: allochiria. [G. allos, other, + aisthesis, sensation] * * * al·les·the·sia (al″es theґzhə) [all + esthesia] a dysesthesia in which a sensation, as of pain or touch, is experienced at a point remote from that at which the stimulus… … Medical dictionary
synchiria — Also known as diplohaptia. The term synchiria comes from the Greek words sun (together) and cheir (hand). It was introduced in or shortly before 1907 by the Welsh neurologist and psychoanalyst Alfred Ernest Jones (1879 1958) to denote a… … Dictionary of Hallucinations
allocheiria — noun see allochiria * * * allocheiria or allochiria / kīˈri ə or kiˈ/ noun (Gr cheir hand; botany) Attribution of a sensation to the wrong part of the body, eg to the other hand when one is painful • • • Main Entry: ↑allo … Useful english dictionary
List of neurological disorders — This is a list of major and frequently observed neurological disorders (e.g., Alzheimer s disease), symptoms (e.g., back pain), signs (e.g., aphasia) and syndromes (e.g., Aicardi syndrome). Contents: Top · 0–9 A B C D E F G H I J K L M N O P … Wikipedia