Observations on the association fibre system of the visual cortex and the central representation of the retina.

IT is generally assumed, on the basis of experimental studies (as well as traditional teaching), that the visual cortex is directly connected with distant cortical areas, particularly with those of the parietal lobe, by well-marked systems of association fibres. It has been assumed, also, that these connexions provide the means whereby visual stimuli can immediately be brought into relation with the general sensory or the auditory cortex so as to provide the basis of visuo-tactile or visuo-auditory associations. Some authors have even described direct fibre paths extending from the visual cortex to the motor cortex of the precentral convolution.