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At least 1,171 records · Page 65Linked to original sources
PubMed1982

Sinistral inverters do no possess an anomalous visuomotor organization.

Moscovitch and Smith (Science 205, 710-713, 1979, and Neuropsychologia 17, 637-644, 1979), while failing to confirm Levy and Reid's general hypothesis that sinistrals writing with an inverted posture have predominantly uncrossed or ipsilateral motor pathways, nevertheless reported that they possess an unusual visuomotor organization. We incorporated an extra (arm-across-the-midline) condition into a version of their study. Not only could we not replicate their original findings, but we believe that their data may have been contaminated by spatial compatibility effects which require the crossed-arm condition for elimination. Sinistral inverters in fact appear to have exactly the same motor and visuomotor organization as noninverters and dextrals. A value of 4 msec for transcommissural transmission times was obtained, which corresponds well with other electrophysiological and behavioral estimates.

Dominance, Cerebral↗
PubMed1982

Language in the absence of inner speech.

A 54-year-old man abruptly became mute with mild right hemiparesis. Written expression, comprehension of speech and print, calculating ability, and verbal short-term recall, although slow, were largely preserved. Extensive studies demonstrated complete loss of inner speech. He was unable to speak to himself and unable to appreciate the phonological structure of words. Instead, his preserved language skills were based on a highly developed visual imagery. This case greatly extends the range of language skills previously thought possible in individuals who suffer the loss of inner speech.

Aphasia↗
PubMed1983

Incidence of left-handed writing in a college population with reference to family patterns of hand preference.

Hand preference data were obtained for 1816 university students, 4793 siblings and 3632 parents. Results support the following conclusions. (1) There is currently a 13.8% incidence of left handedness among young adults, representing a dramatic increase over past generations. (2) Left and right-handed respondents do not differ in terms of familial sinistrality. (3) Mother's left-handedness is associated with an increase in the incidence of sinistrality for sons and daughters, while father's left handedness is related only to sons.

Adult↗
PubMed1983

Hemispheric specialization and the perception of emotion: evidence from right-handers and from inverted and non-inverted left-handers.

Right-handers and inverted and non-inverted left-handers viewed emotional expressions in one hemifield and, simultaneously, a neutral expression of the same poser in the other hemifield. Subjects were required to identify the side containing the affective face. Happy faces with open (i.e. salient) and closed mouth smiles and sad faces were used as stimuli. For right-handers and inverters reaction time was faster to right hemifield presentations for happy faces and to left hemifield presentations for sad faces. Non-inverters showed the reverse pattern. The saliency of the happy expressions had no effect on the magnitude and direction of asymmetry for any group. The data support the hypothesis of differential hemispheric specialization for positive and negative emotion and demonstrate opposite patterns of asymmetry in affect perception for inverted and non-inverted left-handers.

Adult↗