Neural coding and contextual influences in the whisker system
نویسندگان
چکیده
منابع مشابه
Texture coding in the whisker system.
The whisker somatosensory system in awake, behaving rodents is a powerful model for studying neurobiology of sensation, from molecules to circuits to behavior. Recent studies reveal how key tactile features are detected in awake animals and encoded by spike trains in somatosensory cortex (S1). Here we summarize progress on detection of surface texture (roughness). Texture appears to be inferred...
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Neural signals for color vision in trichromatic primate species are mediated by two parallel retinal pathways. Both pathways carry opponent signals, corresponding to the difference of responses of the short-wavelength sensitive cones and the cones sensitive at longer wavelengths, and to the difference between mediumand long-wavelength sensitive cone responses, respectively. This dichotomy is re...
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Animals seek out relevant information by moving through a dynamic world, but sensory systems are usually studied under highly constrained and passive conditions that may not probe important dimensions of the neural code. Here, we explored neural coding in the barrel cortex of head-fixed mice that tracked walls with their whiskers in tactile virtual reality. Optogenetic manipulations revealed th...
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From only brief exposure to a face, individuals spontaneously categorize another's race. Recent behavioral evidence suggests that visual context may affect such categorizations. We used fMRI to examine the neural basis of contextual influences on the race categorization of faces. Participants categorized the race of faces that varied along a White-Asian morph continuum and were surrounded by Am...
متن کاملNeuronal basis of tactile sense in the rat whisker system
Using their whiskers, rats have tactile capacities rivaling those of the human with our fingertips. We have carried out experiments to explore how neurons encode touch signals to build up a central representation. Touch signals begin with the receptors in the follicle of each whisker and can be traced to a columnar module in somatosensory cortex that is connected with the same whisker: the well...
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ژورنال
عنوان ژورنال: Biological Cybernetics
سال: 2009
ISSN: 0340-1200,1432-0770
DOI: 10.1007/s00422-008-0290-5