scholarly journals P1-5: Effect of Luminance Contrast on the Color Selective Responses in the Inferior Temporal Cortex Neurons of the Macaque Monkey

i-Perception ◽  
10.1068/if619 ◽  
2012 ◽  
Vol 3 (9) ◽  
pp. 619-619
Author(s):  
Tomoyuki Namima ◽  
Masaharu Yasuda ◽  
Taku Banno ◽  
Hidehiko Komatsu
Keyword(s):  
Temporal Cortex ◽  
Luminance Contrast ◽  
Macaque Monkey ◽  
Inferior Temporal Cortex

scholarly journals Color tuning of neurons in face patches of macaque inferior temporal cortex

2019 ◽  
Author(s):  
Marianne Duyck ◽  
Tessa J. Gruen ◽  
Lawrence Y. Tello ◽  
Serena Eastman ◽  
Joshua Fuller-Deets ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Temporal Cortex ◽  
Luminance Contrast ◽  
Macaque Monkey ◽  
Inferior Temporal Cortex ◽  
Color Tuning ◽  
Quantitative Measurements ◽  
Cone Activity ◽  
Insight Into

Previous work has shown that under viewing conditions that break retinal mechanisms for color, one class of objects appears paradoxically colored: faces, and they look green. Interpreted within a Bayesian-observer framework, this observation makes the surprising prediction that face-selective neurons are sensitive to color and weakly biased for colors that elicit L>M cone activity (warm colors). We tested this hypothesis by measuring color-tuning responses of face-selective cells in alert macaque monkey, using fMRI-guided microelectrode recording of the middle and anterior face patches and carefully color-calibrated stimuli. The population of face-selective neurons showed significant color tuning when assessed using images that preserved the luminance contrast relationships of the original face photographs. A Fourier analysis of the color-tuning responses uncovered two components. The first harmonic was biased towards the L>M colors, consistent with the prediction. Interestingly, the second harmonic aligned with the S-cone cardinal axis, which may relate to the computation of animacy by IT cells.SignificanceThe results provide the first quantitative measurements of the color tuning properties of face-selective neurons. The results provide insight into the neural mechanisms that could support the role of color in face perception.

Functional mapping of the inferior temporal cortex (IT) of the macaque monkey

1988 ◽  
Vol 7 ◽  
pp. S212
Author(s):  
Keiji Tanaka ◽  
Hide-Aki Saito ◽  
Yoshiro Fukada ◽  
Madoka Fukumoto
Keyword(s):  
Temporal Cortex ◽  
Macaque Monkey ◽  
Functional Mapping ◽  
Inferior Temporal Cortex

scholarly journals Relationship Between the Activities of Gloss-Selective Neurons in the Macaque Inferior Temporal Cortex and the Gloss Discrimination Behavior of the Monkey

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Mika Baba ◽  
Akiko Nishio ◽  
Hidehiko Komatsu
Keyword(s):  
Causal Relationship ◽  
Discrimination Task ◽  
Temporal Cortex ◽  
Discrimination Performance ◽  
Macaque Monkey ◽  
Inferior Temporal Cortex ◽  
Population Activity ◽  
Electrical Microstimulation ◽  
Neural Activities ◽  
Restricted Region

Abstract In the macaque monkey, neurons that selectively respond to specific gloss are present in a restricted region of the central part of the inferior temporal (IT) cortex. Although the population activity of these neurons is known to represent the perceptual gloss space, the involvement of their activity in gloss perception has not been directly tested. In the present study, we examined the causal relationship between the activities of gloss-selective neurons and gloss perception by applying electrical microstimulation or injection of small amounts of muscimol (GABAA agonist) to manipulate neural activities while monkeys performed a gloss discrimination task. We found that microstimulation within or in the vicinity of the region where gloss-selective neurons were recorded induced bias toward higher gloss judgment. With muscimol injection, gloss discrimination performance was degraded in one monkey after the first injection into the region where gloss-selective neurons were recorded. These results suggest that gloss discrimination behavior is mediated by the activities of a gloss-selective network that includes the gloss-selective region in the central IT cortex examined here.

The lateral geniculate nucleus projects to the inferior temporal cortex in the macaque monkey

Neuroreport ◽  
1994 ◽  
Vol 5 (18) ◽  
pp. 2693-2696 ◽  
Author(s):  
Amalia Hernández-González ◽  
Carmen Cavada ◽  
Fernando Reinoso-Suárez
Keyword(s):  
Lateral Geniculate Nucleus ◽  
Temporal Cortex ◽  
Macaque Monkey ◽  
Inferior Temporal Cortex ◽  
Lateral Geniculate
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