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دسته بندی:
شبکه های نورونی - neuron-networks
سال انتشار:
2020
عنوان انگلیسی مقاله:
Long-range connections enrich cortical computations
ترجمه فارسی عنوان مقاله:
اتصالات دوربرد غنی سازی محاسبات قشر
منبع:
Sciencedirect - Elsevier - Neuroscience Research, Corrected proof: doi:10:1016/j:neures:2020:05:004
نویسنده:
Tatsuo K Satoa
چکیده انگلیسی:
The cerebral cortex can perform powerful computations, including those involved in higher cognitivefunctions. Cortical processing for such computations is executed by local circuits and is further enrichedby long-range connectivity. This connectivity is activated under specific conditions and modulates localprocessing, providing flexibility in the computational performance of the cortex. For instance, long-rangeconnectivity in the primary visual cortex exerts facilitatory impacts when the cortex is silent but sup-pressive impacts when the cortex is strongly sensory-stimulated. These dual impacts can be captured bya divisive gain control model. Recent methodological advances such as optogenetics, anatomical tracing,and two-photon microscopy have enabled neuroscientists to probe the circuit and synaptic bases of long-range connectivity in detail. Here, I review a series of evidence indicating essential roles of long-rangeconnectivity in visual and hierarchical processing involving numerous cortical areas. I also describe anoverview of the challenges encountered in investigating underlying synaptic mechanisms and highlightrecent technical approaches that may overcome these difficulties and provide new insights into synapticmechanisms for cortical processing involving long-range connectivity
Keywords:Long-range connectivity | Hierarchical processing | Visual cortex | Gain control | Sensory-Motor interaction | Synaptic mechanism
قیمت: رایگان
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