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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Liao, Chia-Chi Chen, Ruei-Feng Lai, Wen-Sung Lin, Rick C. S. Yen, Chen-Tung |
| Description | Country affiliation: Taiwan Author Affiliation: Liao CC ( Central Laboratory, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei 111, Taiwan.) |
| Abstract | The present study was undertaken to determine the precise projection pattern from the primary (S1) and secondary (S2) somatosensory cortices to the posterior nuclear proper (POm) and ventroposterior thalamic nuclei (VP). The POm was previously shown to receive large boutons arising exclusively from layer V of the S1 barrel region. This descending input was proposed to play a key role, namely, as a driver, in shaping the receptive property of POm neurons. To determine whether other body parts and the S2 also contribute such unique inputs to the dorsal thalamus, anterograde neuroanatomical tracers were focally deposited in the S1 and S2 forepaw and whisker regions of rats and C57BL6-Tg (GFPm)/Thy1 transgenic mice. Our major findings were that, 1) irrespective of body representations, both the S1 and the S2 provided corticothalamic large terminals to the POm with comparable morphological characteristics and 2) descending large terminals were also noted in particular subzones within the VP, including boundary and caudal areas. We concluded, based on these findings, that the rodent VP has three partitions: the rostral VP innervated by small corticothalamic terminals, the caudal VP with both corticothalamic small and large terminals, and a surrounding shell region, which also contained large terminals. Furthermore, assuming that the large terminal has a driver's role, we propose that particular subzones in the VP may play a role as a multiple-order thalamic relay so that they can simultaneously coordinate with first- and higher-order relays in the thalamocortical circuitry for processing somatosensory information. |
| File Format | HTM / HTML |
| ISSN | 00219967 |
| Issue Number | 13 |
| Volume Number | 518 |
| e-ISSN | 10969861 |
| Journal | Journal of Comparative Neurology |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 2010-07-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Neurology Neurons Cytology Presynaptic Terminals Somatosensory Cortex Anatomy & Histology Thalamus Animals Axons Ultrastructure Female Forelimb Green Fluorescent Proteins Genetics Mice Mice, Inbred C57bl Mice, Transgenic Models, Anatomic Models, Neurological Neural Pathways Rats Rats, Long-evans Vibrissae Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience |
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