Interhemispheric connections between primary visual areas: beyond the midline rule

Brazilian Journal of Medical and Biological Research

J.-c. Houzel¹  M.l. Carvalho¹  R. Lent¹ 

[1] ,Universidade Federal do Rio de Janeiro Instituto de Ciências Biomédicas Departamento de AnatomiaRio de Janeiro RJ ,Brasil

关键词: Corpus callosum;    Visual cortex;    Perceptual binding;    Vertical midline;    Orientation column;    Binocular interactions;   

DOI  :  10.1590/S0100-879X2002001200005

来源: SciELO

【 摘 要 】

In the last five years, a number of detailed anatomical, electrophysiological, optical imaging and simulation studies performed in a variety of non-human species have revealed that the functional organization of callosal connections between primary visual areas is more elaborate than previously thought. Callosal cell bodies and terminals are clustered in columns whose correspondence to features mapped in the visual cortex, such as orientation and ocularity, are starting to be understood. Callosal connections are not restricted to the vertical midline representation nor do they establish merely point-to-point retinotopic correspondences across the hemispheres, as traditionally believed. In addition, anatomical studies have revealed the existence of an ipsilateral component of callosal axons. The aim of this short review is to propose how these new data can be integrated into an updated scheme of the circuits responsible for assembling the primary visual field map.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License