* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Visual categorization shapes feature selectivity in the primate
Nonsynaptic plasticity wikipedia , lookup
Caridoid escape reaction wikipedia , lookup
Perception of infrasound wikipedia , lookup
Single-unit recording wikipedia , lookup
Neuroplasticity wikipedia , lookup
Development of the nervous system wikipedia , lookup
Affective neuroscience wikipedia , lookup
Activity-dependent plasticity wikipedia , lookup
Human brain wikipedia , lookup
Convolutional neural network wikipedia , lookup
Visual search wikipedia , lookup
Neural oscillation wikipedia , lookup
Neuroanatomy wikipedia , lookup
Environmental enrichment wikipedia , lookup
Cortical cooling wikipedia , lookup
Cognitive neuroscience of music wikipedia , lookup
Biological neuron model wikipedia , lookup
Eyeblink conditioning wikipedia , lookup
Clinical neurochemistry wikipedia , lookup
Mirror neuron wikipedia , lookup
Binding problem wikipedia , lookup
Pre-Bötzinger complex wikipedia , lookup
Aging brain wikipedia , lookup
Psychophysics wikipedia , lookup
Visual extinction wikipedia , lookup
Emotional lateralization wikipedia , lookup
Neuroeconomics wikipedia , lookup
Neuroesthetics wikipedia , lookup
Optogenetics wikipedia , lookup
Neuropsychopharmacology wikipedia , lookup
Premovement neuronal activity wikipedia , lookup
Metastability in the brain wikipedia , lookup
Nervous system network models wikipedia , lookup
Channelrhodopsin wikipedia , lookup
C1 and P1 (neuroscience) wikipedia , lookup
Synaptic gating wikipedia , lookup
Stimulus (physiology) wikipedia , lookup
Neural coding wikipedia , lookup
Neural correlates of consciousness wikipedia , lookup
Time perception wikipedia , lookup
Visual categorization shapes feature selectivity in the primate temporal cortex Interdisciplinary Program in Brain Science Eye Movement & Vision Research LAB Hwang, Jae Won Inferior Temporal Cortex • The inferior temporal cortex area has a critical role in visual object recognition and responds to complex stimuli. • Activity in the human temporal cortex is thought to be sensitive to the categorization level of the stimuli and to depend on the expertise of the observer. Stimuli and Categories Feature Selectivity •An example of a neuron whose firing rate discriminates different values of one diagnostic feature of the eye height(EH) stimuli. Black : Responses of the neuron to the best feature value Grey : Responses to the worst feature value s.i. : Selectivity Index = Max - Min Max + Min Population Average • Population average for all the neurons tested with the face stimuli. Black : average responses to the best feature value Grey : average responses to the worst feature value Representation of the DF Red circles : Neurons with statistically significant selectivity for diagnostic dimension only Blue circles : Neurons with significant selectivity for diagnostic and non-diagnostic feature Black triangles : Neurons with no significant selectivity Red star : Example neuron depicted in previous figure Conclusion • Stimulus features important for categorization are instantiated in the activity of single units in the primate inferior temporal cortex. • This neuronal fine-tuning may reflect the monkey’s perceptual increase of sensitivity for the diagnostic features.