Hemispheric processing of kinesthetically oriented spatial perception Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/qn59q716r

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  • Right cerebral hemispheric lateralization for spatial perception has been reported by using visual and tactile spatial tasks in brain-damaged patients, split-brain patients, and normal subjects. The main purpose of the present study was to investigate whether or not kinesthetic spatial perception was dominantly processed with the right cerebral hemisphere as well. In addition to this lateralization effect, the variables of sex, response verbalization, and active versus passive movement were manipulated in the present study. Sex and response verbalization have previously been reported to affect lateralization. Thirty two male and 32 female Caucasian right handed subjects without left-handed relatives participated in two kinesthetic spatial positioning tasks. A thumb angular position discrimination task was administered by the method of constant stimuli (MOCS) and yielded two criterion measures, difference limen (DL) and constant error (CE). The second task of thumb angular position reproduction was administered by the method of average error (MOAE) and yielded three criterion measures; constant error (CE), absolute error (AE), and variable error (VE). A mixed type of analysis of variance was calculated for each of the five criterion measures and was used to test for the effects of manipulated variables. The following results were obtained; (1) a significant difference existed between responses of right and left thumbs in the difference limen (DL-MOCS); (2) actively produced constrained standard movement produced negative time error (undershoot) while passive condition resulted in positive time error (overshoot) in reproduction task. No sex or response verbalization effects were found for lateralization.
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