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At least 109 records · Page 6Linked to original sources
PubMed1993

[Space perception in cerebral hemisphere damage. Neuropsychological study].

The present study was aimed at using both semiotic and symbolic spaces as an exploratory method of the simultaneous synthesis, and interhemispherical transfers among hemiplegic patients. Thirty-six hemiplegic patients with an established neurological deficit were selected, then split into two groups: 19 patients with their dominant hemispheres affected, 17 patients with their subordinate hemispheres affected. The following types of patients have been excluded from this study: Patients with cerebral degenerative and/or progressive alterations, patients with sensory aphasias, and damage to the counterlateral side opposite the hemiplegic side. Age range was 67.2 (with 45-year-old as a minimum, and 70-year-old as a maximum). Subjects were 11 females and 25 males. Both the semiotic, and the symbolic spaces have been explored as well as the existence of a parietal, sensitive syndrome, and damage topography by means of a scanner device. A major damage of the symbolic space in patients with their dominant hemispheres affected was observed. Conversely, semiotic space, in its figurative trait, was most affected in patients with their subordinate hemispheres affected.

Aged↗
PubMedDate not supplied

[Results of a study of vestibular function and space perception in cosmonauts].

The results of studying the vestibular function and the function of spatial perception in 26 cosmonauts before and after 30 space flights are discussed. The typical postflight changes in these functions were: an increase in the reactivity of the otolith organ, a decrease in the sensitivity of semicircular canals, a decline in the accuracy of perception of spatial coordinates, asymmetry of most parameters, development of illusionary reactions inflight. The cosmonauts also showed individual variations with respect to the degrees of the above responses, the dynamics and length of adaptation, the development of the motion sickness symptom-complex, etc. At R+O some cosmonauts exhibited a change in the direction of the eye counter-rotation, i. e., the negative otolith reflex or at turn towards the tilt direction. Possible mechanisms of these vestibular changes are discussed.

Adult↗