Overall pattern of callosal connections in visual cortex of normal and enucleated cats

1995 ◽  
Vol 363 (2) ◽  
pp. 161-176 ◽  
Author(s):  
Jaime F. Olavarria ◽  
Richard C. Van Sluyters
Keyword(s):  
Visual Cortex ◽  
Callosal Connections

Prenatal protein restriction alters synaptic mechanisms of callosal connections in the rat visual cortex

1998 ◽  
Vol 16 (2) ◽  
pp. 75-84 ◽  
Author(s):  
R. Soto‐Moyano ◽  
S. Alarcón ◽  
J. Belmar ◽  
C. Kusch ◽  
H. Pérez ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Protein Restriction ◽  
Callosal Connections ◽  
Synaptic Mechanisms

scholarly journals Blockade of retinal or cortical activity does not prevent the development of callosal patches normally associated with ocular dominance columns in primary visual cortex

2021 ◽  
Vol 38 ◽  
Author(s):  
Hsueh Chung Lu ◽  
Robyn J. Laing ◽  
Jaime F. Olavarria
Keyword(s):  
Visual Cortex ◽  
Primary Visual Cortex ◽  
Neural Activity ◽  
Single Injection ◽  
Ocular Dominance ◽  
Cell Activity ◽  
Ocular Dominance Columns ◽  
Callosal Connections ◽  
Monocular Enucleation ◽  
Physiological Evaluation

Abstract Callosal patches in primary visual cortex of Long Evans rats, normally associated with ocular dominance columns, emerge by postnatal day 10 (P10), but they do not form in rats monocularly enucleated a few days before P10. We investigated whether we could replicate the results of monocular enucleation by using tetrodotoxin (TTX) to block neural activity in one eye, or in primary visual cortex. Animals received daily intravitreal (P6–P9) or intracortical (P7–P9) injections of TTX, and our physiological evaluation of the efficacy of these injections indicated that the blockade induced by a single injection lasted at least 24 h. Four weeks later, the patterns of callosal connections in one hemisphere were revealed after multiple injections of horseradish peroxidase in the other hemisphere. We found that in rats receiving either intravitreal or cortical injections of TTX, the patterns of callosal patches analyzed in tangential sections from the flattened cortex were not significantly different from the pattern in normal rats. Our findings, therefore, suggest that the effects of monocular enucleation on the distribution of callosal connections are not due to the resulting imbalance of afferent ganglion cell activity, and that factors other than neural activity are likely involved.

Widespread callosal connections in infragranular visual cortex of the rat

1983 ◽  
Vol 279 (1-2) ◽  
pp. 233-237 ◽  
Author(s):  
Jaime Olavarria ◽  
Richard C. Van Sluyters
Keyword(s):  
Visual Cortex ◽  
Callosal Connections

Heterotopic and homotopic callosal connections in rat visual cortex

1984 ◽  
Vol 297 (1) ◽  
pp. 75-89 ◽  
Author(s):  
Michael W. Miller ◽  
Brent A. Vogt
Keyword(s):  
Visual Cortex ◽  
Callosal Connections

scholarly journals Identification of Eye-Specific Domains and Their Relation to Callosal Connections in Primary Visual Cortex of Long Evans Rats

2014 ◽  
Vol 25 (10) ◽  
pp. 3314-3329 ◽  
Author(s):  
R.J. Laing ◽  
J. Turecek ◽  
T. Takahata ◽  
J.F. Olavarria
Keyword(s):  
Visual Cortex ◽  
Primary Visual Cortex ◽  
Callosal Connections ◽  
Long Evans
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