Abstract:
:There is abundant psychophysical evidence in humans suggesting the existence of parallel pathways subserving different aspects of vision. However, there is little direct proof of the neural structures underlying the two pathways. We present direct anatomical evidence that in the normal human optic tract fibres are segregated according to size. Large axons, likely to correspond to the magnocellular pathway of non-human primates, take a more ventral and superficial course than the smaller axons belonging to the parvocellular pathway. This anatomical segregation not only reinforces the hypothesis of parallel pathways but, more importantly, offers a unique opportunity for studying the psychophysical effects of selective damage to one or the other fibre contingent.
journal_name
Neuroreportjournal_title
Neuroreportauthors
Tassinari G,Campara D,Balercia G,Chilosi M,Martignoni G,Marzi CAdoi
10.1097/00001756-199407000-00005subject
Has Abstractpub_date
1994-07-21 00:00:00pages
1425-8issue
12eissn
0959-4965issn
1473-558Xjournal_volume
5pub_type
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