A somatotopic map of vibrissa motion direction within a barrel column
Most mammals possess high-resolution visual perception, with primary visual cortices containing fine-scale, inter-related feature representations (for example, orientation and ocular dominance). Rats lack precise vision, but their vibrissa sensory system provides a precise tactile modality, includin...
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| Veröffentlicht in: | Nature neuroscience 2006-04, Vol.9 (4), p.543-551 |
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| creator | Andermann, Mark L Moore, Christopher I |
| description | Most mammals possess high-resolution visual perception, with primary visual cortices containing fine-scale, inter-related feature representations (for example, orientation and ocular dominance). Rats lack precise vision, but their vibrissa sensory system provides a precise tactile modality, including vibrissa-related 'barrel' columns in primary somatosensory cortex. Here, we examined the subcolumnar organization of direction preference and somatotopy using a new omni-directional, multi-vibrissa stimulator. We discovered a direction map that was systematically linked to somatotopy, such that neurons were tuned for motion toward their preferred surround vibrissa. This sub-barrel column direction map demonstrated an emergent refinement from layer IV to layer II/III. These data suggest that joint processing of multiple sensory features is a common property of high-resolution sensory systems. |
| doi_str_mv | 10.1038/nn1671 |
| format | Article |
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| subjects | Animal Genetics and Genomics Animals Behavioral Sciences Biological Techniques Biomedical and Life Sciences Biomedicine Brain Mapping Electric Stimulation Hypotheses Male Models, Anatomic Motion Perception - physiology Neurobiology Neurons - cytology Neurons - metabolism Neurosciences Preferences Rats Rats, Sprague-Dawley Somatosensory Cortex - anatomy & histology Somatosensory Cortex - physiology Vibrissae - metabolism |
| title | A somatotopic map of vibrissa motion direction within a barrel column |
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