scholarly journals Time course of cytochrome oxidase blob plasticity in the primary visual cortex of adult monkeys after retinal laser lesions

2018 ◽  
Vol 527 (3) ◽  
pp. 600-613
Author(s):  
Mariana F. Farias ◽  
Leslie G. Ungerleider ◽  
Sandra S. Pereira ◽  
Ana Karla J. Amorim ◽  
Juliana G. M. Soares ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Cytochrome Oxidase ◽  
Primary Visual Cortex ◽  
Time Course

Neuropeptide Y-Containing Neurons are Situated Predominantly Outside Cytochrome Oxidase Puffs in Macaque Visual Cortex

1989 ◽  
Vol 2 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Rodrigo O. Kuljis ◽  
Pasko Rakic
Keyword(s):  
Visual Cortex ◽  
Receptive Field ◽  
Neuropeptide Y ◽  
Cytochrome Oxidase ◽  
Primary Visual Cortex ◽  
Spatial Relationship ◽  
Regular Pattern ◽  
Cortical Connectivity ◽  
Local Circuit ◽  
Immunocytochemical Method

AbstractLayers II/III of the primary visual cortex contain a regular pattern of histochemically detectable cytochrome oxidase (CO)-rich “puffs,” which differ from the interpuff regions in their thalamo-cortical and cortico-cortical connectivity, receptive-field properties, and the density of inhibitory GABA-containing synaptic terminals. We used an immunocytochemical method, in combination with cytochrome oxidase histochemistry, to analyze the spatial relationship between neurons that contain neuropeptide Y (NPY) and the CO puffs. Of a total of 606 neurons, only 2.6% of the NPY-containing cells are located in the puffs, whereas the rest are situated in the interpuffs, or at the interface between puffs and interpuffs. The number of NPY-containing neurons in the puffs is substantially less than that expected in an equal volume of the interpuffs (X2 = 13.86; df = 1; P < 0.001).These observations indicate that columns containing the puffs may differ also from those in the interpuff regions in that they contain a unique array of chemically and morphologically distinct local circuit neurons.

Broad-tuned chromatic inputs to color-selective neurons in the monkey visual cortex

1994 ◽  
Vol 72 (1) ◽  
pp. 163-168 ◽  
Author(s):  
H. Sato ◽  
N. Katsuyama ◽  
H. Tamura ◽  
Y. Hata ◽  
T. Tsumoto
Keyword(s):  
Visual Cortex ◽  
Receptor Antagonist ◽  
Cytochrome Oxidase ◽  
Primary Visual Cortex ◽  
Emission Spectra ◽  
Intracortical Inhibition ◽  
Expected Value ◽  
Color Stimulus ◽  
Different Types ◽  
Monkey Visual Cortex

1. Input mechanisms of 21 color-selective cells in cytochrome oxidase-rich blobs in layer II/III of the anesthetized and paralyzed monkey primary visual cortex were studied by an iontophoretic administration of the GABAergic receptor antagonist bicuculline methiodide (BMI). 2. Color-selective blob cells become responsive to originally nonresponsive colors of stimuli or brightness contrast stimuli during removal of intracortical inhibition. 3. The magnitudes of the cells' responses to color stimuli during BMI administration were larger than the expected value of response calculated from the previously reported color tuning of color-selective geniculate cells and emission spectra of color stimulus. 4. These results suggest that color-selective blob cells receive a convergence of different types of chromatic inputs and that intracortical inhibition confers selectivity for a given color on them.

scholarly journals Magnitude, time course, and specificity of rapid adaptation across mouse visual areas

2020 ◽  
Vol 124 (1) ◽  
pp. 245-258 ◽  
Author(s):  
Miaomiao Jin ◽  
Lindsey L. Glickfeld
Keyword(s):  
Visual Cortex ◽  
Visual System ◽  
Primary Visual Cortex ◽  
Sensory Processing ◽  
Time Course ◽  
Recent Experience ◽  
Rapid Adaptation ◽  
It Impacts ◽  
Visual Areas ◽  
Higher Visual Areas

Rapid adaptation dynamically alters sensory signals to account for recent experience. To understand how adaptation affects sensory processing and perception, we must determine how it impacts the diverse set of cortical and subcortical areas along the hierarchy of the mouse visual system. We find that rapid adaptation strongly impacts neurons in primary visual cortex, the higher visual areas, and the colliculus, consistent with its profound effects on behavior.

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