Experimental Brain Research

, Volume 57, Issue 3, pp 554–561

Visual recognition in monkeys: effects of separate vs. combined transection of fornix and amygdalofugal pathways


  • J. Bachevalier
    • Conseil de la Recherche en Santé du
  • J. K. Parkinson
    • Department of Medical NeuroscienceWalter Reed Army Institute of Research
  • M. Mishkin
    • Laboratory of Neuropsychology, National Institute of Mental Health

DOI: 10.1007/BF00237842

Cite this article as:
Bachevalier, J., Parkinson, J.K. & Mishkin, M. Exp Brain Res (1985) 57: 554. doi:10.1007/BF00237842


Performance on an object recognition test was assessed in monkeys with transections of either the fornix, the amygdalofugal pathways, or both. Whereas separate transection of the two pathways produced only small and unreliable effects, their combined transection produced a severe deficit. Comparison with the results of a previous study (Mishkin 1978) indicates that combined disconnection of the amygdala and hippocampus from the diencephalon yields a memory impairment similar to that following combined damage to the two limbic structures themselves. The findings suggest that recognition memory in monkeys depends on two parallel limbo-diencephalic pathways.

Key words

FornixAmygdalofugal pathwaysRecognition memoryMonkeys
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© Springer-Verlag 1985