VISUAL DISCRIMINATION IN MONOCULARLY TRAINED RATS FOLLOWING UNILATERAL LESION IN THE REGION OF THE OPTIC TRACT.
Final technical rept. Oct 67-Sep 69,
OSLO UNIV (NORWAY)
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To ascertain whether the uncrossed optic nerve fibers of the albino rat can mediate complex visual discriminations, monocular unoperated subjects and monocular subjects operated in the region of the optic tract were tested for retention of a preoperatively learned visual size discrimination, tested on size discrimination threshold, tested for retention of a visual pattern discrimination habit, and then tested for the influence of continuity of pattern. Subjects with lesions in the region of the optic tract did not make poorer scores than unoperated controls. The study remains inconclusive because of failure to resect the optic tract in any of the operated subjects. Conclusive results could have been interpreted in view of Lashleys 1939 study on the functioning of small remnants of the visual cortex. Author
- Anatomy and Physiology