Evolution of the primate visual system: Anterograde degeneration studies of the tecto-pulvinar system

A partial answer to the question of the precocious development of the temporal lobe in fossil lemurs is offered by the presentation of evidence that in the tree shrew, in prosimians, and probably in all primates the temporal lobe contains primary visual cortex. The visual pathway to the temporal lob...

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Bibliographic Details
Published in:American journal of physical anthropology 1973-03, Vol.38 (2), p.383-392
Main Authors: Harting, J. K., Glendenning, K. K., Diamond, I. T., Hall, W. C.
Format: Article
Language:English
Subjects:
Animals
Biological Evolution
Haplorhini
Macaca - anatomy & histology
Nerve Degeneration
Neural Pathways - anatomy & histology
Primates - anatomy & histology
Shrews - anatomy & histology
Superior Colliculi - anatomy & histology
Temporal Lobe - anatomy & histology
Thalamic Nuclei - anatomy & histology
Visual Cortex - anatomy & histology
Visual Pathways - anatomy & histology
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Summary:A partial answer to the question of the precocious development of the temporal lobe in fossil lemurs is offered by the presentation of evidence that in the tree shrew, in prosimians, and probably in all primates the temporal lobe contains primary visual cortex. The visual pathway to the temporal lobe is achieved by relays through the superficial layers of the superior colliculus and pulvinar nucleus. This pathway parallels the geniculo‐striate system. Still a third visual system can be identified with sensory‐motor connections in the deeper layers of the superior colliculus.
ISSN:0002-9483
1096-8644
DOI:10.1002/ajpa.1330380237