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Unilateral attention deficits and hemispheric asymmetries in the control visual attention
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Cognitive behaviour in asymptomatic (CDC stage II and III)-seropositive intravenous drug users
No full textInfluence of neurological factors on the personality profile of patients with temporal lobe epilepsy
No full textTaste laterality in the split brain
No full textTwo patients with corpus callosum resection, one complete and the other sparing the genu and the rostrum, were tested for discrimination of three basic taste stimuli (sour, bitter, salty) applied to the right or left sides of the tongue. Responses were made by pointing with either hand to written words or images of visual objects corresponding to the stimuli, a language-based discrimination. In both patients, response accuracy was significantly above chance for both hemitongues but there was a significant advantage for the left side. Reaction time was shorter for left stimuli than for right stimuli but the difference was not significant. Eight normal controls matched for age with the patients performed equally well with right and left hemitongue stimuli and so did a third callosotomy patient with sparing of the posterior callosum, including the splenium. Tactile and visual tests showed that the left hemisphere was responsible for language-based responses in the first two patients. The results confirm and extend previous findings in another callosotomy patient, indicating that: (i) taste information from either side of the tongue can reach the left hemisphere in the absence of the corpus callosum; (ii) the ipsilateral input from the tongue to the left hemisphere is more potent functionally than the contralateral input and (iii) in the normal brain, the corpus callosum, specifically its posterior part including the splenium, appears to equalize the effects of the ipsilateral and contralateral gustatory inputs on the left hemisphere. Taken together with evidence about lateralized taste deficits following unilateral cortical lesions, the results also suggest that the gustatory pathways from tongue to cortex are bilaterally-distributed with an ipsilateral predominance that may be subject to individual variations
Trail Making test: Normative values from 287 Italian normal adult controls
No full textThe Trail Making Test (TMT), which explores visual-conceptual and visual-motor tracking, is a frequently used neuropsychological test because of its ease of administration and sensitivity to brain damage. In this paper, norms are provided for the time scores derived from parts A and B, and for the (B-A) difference. The data were collected from287 adult Italian subjects stratified by gerfder, schooling and age (from 20 to 79 years). The test scores were affected by age, education and general intelligence (as expressed by Raven 's Coloured Progressive Matrices). Only for part A did females have longer time scores than males. Test-retest reliability was high for each score
Peripheral neuropathy in myotonic dystrophy:electrophysiological and clinical feature. Clin Neurophysiol formerly
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