Split chiasm developmentally induced in kittens: plasticity of interhemispheric transfer in visual cortex cells

U. Yinon, M. Chen, A. Hammer

Research output: Contribution to journalArticlepeer-review

Abstract

Visual callosal transfer during development was studied in order to reveal plasticity-related compensation for the absence of direct contralateral inputs. The optic chiasm was midsagittally sectioned in 6-8 weeks old kittens (OCK) and for comparison, in adult cats (OCA). Unit recording was made during adulthood in the border area between visual cortex areas 17 and 18, namely the callosal projection zone. The proportion of cells showing interhemispheric transfer in the OCK group, as indicated by the presence of visual input from the contralateral eye was 10.5%; in the OCA cats their proportion was 4.0%. Moreover, 2.3% of the cells showed a pure transfer of input from the contralateral eye in the OCK, although none was seen in the OCA cats. Thus, during the developmental period, a plasticity induced process, albeit limited, takes place in the enhancement of interhemispheric transfer of visual information.

Original languageEnglish
Pages (from-to)201-203
Number of pages3
JournalExperimental Brain Research
Volume72
Issue number1
DOIs
StatePublished - Aug 1988

Keywords

  • Callosal transfer
  • Kittens
  • Plasticity
  • Split chiasm
  • Visual cortex cells

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