| The organization of frontoparietal cortex in the tree shrew (Tupaia belangeri): II. Connectional evidence for a frontal-posterior parietal network. | |
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MedLine Citation:
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PMID: 17206607 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Tree shrews are small squirrel-like mammals that are the closest living relative to primates available for detailed neurobiological study. In a recent study (Remple et al. [2006] J. Comp. Neurol. 497:133-154), we provided anatomical and electrophysiological evidence that the frontoparietal cortex of tree shrews has two motor fields (M1 and M2) and five somatosensory fields (3a, 3b, S2, somatosensory caudal area [SC], and parietal ventral area [PV]). In the present study, we injected anatomical tracers into M1, M2, 3a, 3b, SC, and posterior parietal cortex to establish the ipsilateral cortical connections of these areas. The results provide evidence for a number of new cortical areas including medial motor and somatosensory areas (MMA and MSA), three posterior parietal areas (PPd, PPv, and PPc), and an area ventral to temporal inferior cortex (TIV). Ml receives topographic projections from M2, MMA, 3a, and PPv, and nontopographic connections from the temporal anterior and dorsal areas (TA and TD), PPc, TIV, and MSA. The connections of M2 are similar to those of M1, except that M2 receives denser projections from TIV, PPc, and dorsal frontal cortex and sparser input from M1. Areas 3a, 3b, and SC receive dense topographic projections from each other, S2, and PV and sparser connections from PPd and PPv. Area 3a receives additional input from posterior parietal and temporal regions and from M1 and MMA. Overall, the frontoparietal connections of tree shrew cortex are most similar to those of prosimian primates and quite different from those of more distant relatives such as rats. |
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Authors:
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Michael S Remple; Jamie L Reed; Iwona Stepniewska; David C Lyon; Jon H Kaas |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: The Journal of comparative neurology Volume: 501 ISSN: 0021-9967 ISO Abbreviation: J. Comp. Neurol. Publication Date: 2007 Mar |
Date Detail:
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Created Date: 2007-04-19 Completed Date: 2007-05-08 Revised Date: 2007-12-03 |
Medline Journal Info:
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Nlm Unique ID: 0406041 Medline TA: J Comp Neurol Country: United States |
Other Details:
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Languages: eng Pagination: 121-49 Citation Subset: IM |
Affiliation:
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Neuroscience Graduate Program, Vanderbilt University, Nashville, Tennessee 37240, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brain Mapping Electrophysiology Female Frontal Lobe / physiology* Indicators and Reagents / administration & dosage Injections Male Motor Cortex / physiology Nerve Net / physiology* Neural Pathways / physiology Parietal Lobe / physiology* Somatosensory Cortex / physiology Synaptic Transmission Tupaiidae / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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NS 16446/NS/NINDS NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/Indicators and Reagents |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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