Abstract
A left-handed patient suddenly developed a right hemiparesis, mirror-reading, and mirror-writing. Although he could discriminate between right and left on himself, he demonstrated right/left spatial disorientation. We propose that his right/left spatial disorientation was induced by a scanning defect. It has been demonstrated that mirror-image engrams are normally available. We believe that a reversal of the learned left-to-right scanning process with the availability of mirror engrams induced mirror-reading. Similarly, reversal of the normal left-to-right writing pattern, with the availability of mirror engrams, induced mirror-writing.
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- Bradshaw J. L., Nettleton N. C., Patterson K. Identification of mirror-reversed and nonreversed facial profiles in same and opposite visual fields. J Exp Psychol. 1973 Jun;99(1):42–48. doi: 10.1037/h0034737. [DOI] [PubMed] [Google Scholar]
- Fischer F. W., Liberman I. Y., Shankweiler D. Reading reversals and developmental dyslexia: a further study. Cortex. 1978 Dec;14(4):496–510. doi: 10.1016/s0010-9452(78)80025-2. [DOI] [PubMed] [Google Scholar]
- Galin D., Ellis R. R. Asymmetry in evoked potentials as an index of lateralized cognitive processes: relation to EEG alpha asymmetry. Neuropsychologia. 1975 Jan;13(1):45–50. doi: 10.1016/0028-3932(75)90046-9. [DOI] [PubMed] [Google Scholar]
- Kinsbourne M. Eye and head turning indicates cerebral lateralization. Science. 1972 May 5;176(4034):539–541. doi: 10.1126/science.176.4034.539. [DOI] [PubMed] [Google Scholar]
- Noble J. Paradoxical interocular transfer of mirror-image discriminations in the optic chiasm sectioned monkey. Brain Res. 1968 Aug 26;10(2):127–151. doi: 10.1016/0006-8993(68)90118-2. [DOI] [PubMed] [Google Scholar]
- Paradowski W., Ginzburg M. Mirror writing and hemiplegia. Percept Mot Skills. 1971 Apr;32(2):617–618. doi: 10.2466/pms.1971.32.2.617. [DOI] [PubMed] [Google Scholar]
- Satz P. A test of some models of hemispheric speech organization in the left- and right-handed. Science. 1979 Mar 16;203(4385):1131–1133. doi: 10.1126/science.424744. [DOI] [PubMed] [Google Scholar]
- Streifler M., Hofman S. Sinistrad mirror writing and reading after brain concussion in a bi-systemic (oriento-occidental) polyglot. Cortex. 1976 Dec;12(4):356–364. doi: 10.1016/s0010-9452(76)80039-1. [DOI] [PubMed] [Google Scholar]