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{{BioPsy}}
 
{{BioPsy}}
The [[Thalamic_reticular_nucleus|thalamic reticular nucleus]] is part of the ventral thalamus that forms a capsule around the [[thalamus]] laterally. It is separated from the thalamus by the [[External_medullary_lamina|external medullary lamina]]. Reticular cells are GABAergic, and have discoid dendritic arbors in the plane of the nucleus.
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{{Infobox Brain|
The thalamic reticular nucleus receives input from the [[Cerebral_cortex|cerebral cortex]] and dorsal thalamic nuclei. Most input comes from collaterals of fibers passing through the thalamic reticular nucleus. Primary thalamic reticular nucleus efferent fibers project to dorsal thalamic nuclei, but never to the cerebral cortex. This is the only thalamic nucleus that does not project to the cerebral cortex.The function of the thalamic reticular nucleus is not understood, although it has some role in absence seizures, von Krosigk et al., 1993. There is debate over the presence of distinct sectors within the nucleus that each correspond to a different sensory or cognitive modality.
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Name = Thalamic reticular nucleus |
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Latin = nucleus reticularis thalami |
For original connectivity anatomy see Jones 1975;
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GraySubject = |
For discussion of mapping and cross modality pathways see Crabtree 2002.
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GrayPage = |
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Image = Constudthal.gif |
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Caption = Thalamus |
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Image2 = |
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Caption2 = |
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IsPartOf = [[Thalamus]]|
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Components = |
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Artery = |
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Vein = |
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BrainInfoType = hier |
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BrainInfoNumber = 348 |
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MeshName = |
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MeshNumber = |
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NeuroLex = Thalamic reticular nucleus
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| NeuroLexID = birnlex_1721 |
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DorlandsPre = n_11 |
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DorlandsSuf = 12583150 |
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}}
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The '''thalamic reticular nucleus''' is part of the ventral thalamus that forms a capsule around the [[thalamus]] laterally. However, recent evidence from mice and fish question this statement and define it as dorsal thalamic structure.<ref>{{cite journal |author=Scholpp S, Delogu A, Gilthorpe J, Peukert D, Schindler S, Lumsden A |title=Her6 regulates the neurogenetic gradient and neuronal identity in the thalamus |journal=Proc. Natl. Acad. Sci. USA |volume=106 |issue=47 |pages=19895–900 |year=2009 |month=November |pmid=19903880 |pmc=2775703 |doi=10.1073/pnas.0910894106 |url=}}</ref><ref>{{cite journal |author=Vue TY, Bluske K, Alishahi A, ''et al.'' |title=Sonic hedgehog signaling controls thalamic progenitor identity and nuclei specification in mice |journal=J. Neurosci. |volume=29 |issue=14 |pages=4484–97 |year=2009 |month=April |pmid=19357274 |pmc=2718849 |doi=10.1523/JNEUROSCI.0656-09.2009 |url=}}</ref> It is separated from the thalamus by the [[external medullary lamina]]. Reticular cells are [[GABAergic]], and have discoid dendritic arbors in the plane of the nucleus.
   
 
Thalamic Reticular Nucleus is variously abbreviated TRN, RTN, NRT, and RT.
 
Thalamic Reticular Nucleus is variously abbreviated TRN, RTN, NRT, and RT.
   
==External links:==
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== Input and output ==
* [http://brainmaps.org Brain Atlas, Brain Maps, Neuroinformatics]
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The thalamic reticular nucleus receives input from the [[cerebral cortex]] and dorsal thalamic nuclei. Most input comes from collaterals of fibers passing through the thalamic reticular nucleus. Primary thalamic reticular nucleus efferent fibers project to dorsal thalamic nuclei, but never to the cerebral cortex. This is the only thalamic nucleus that does not project to the cerebral cortex, instead it modulates the information from other nuclei in the thalamus. Its function is modulatory on signals going through thalamus (and the reticular nucleus).
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It has been suggested that the reticular nucleus receives afferent input from the [[reticular formation]]{{Citation needed|date=October 2011}} and in turn projects to the other thalamic nuclei, regulating the flow of information through these to the cortex. There is debate over the presence of distinct sectors within the nucleus that each correspond to a different sensory or cognitive modality.
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For original connectivity anatomy see Jones 1975.<ref>{{cite journal |author=Jones E |title=Some aspects of the organization of the thalamic reticular complex |journal=J. Comp. Neurol. |volume=162 |issue=3 |pages=285–308 |year=1975 |pmid=1150923 |doi=10.1002/cne.901620302}}</ref>
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For discussion of mapping and cross modality pathways see Crabtree 2002.<ref name="pmid12351751">{{cite journal |author=Crabtree JW, Isaac JT |title=New intrathalamic pathways allowing modality-related and cross-modality switching in the dorsal thalamus |journal=J. Neurosci. |volume=22 |issue=19 |pages=8754–61 |year=2002 |month=October |pmid=12351751 |doi= |url=http://www.jneurosci.org/cgi/pmidlookup?view=long&pmid=12351751}}</ref>
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==References==
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{{reflist}}
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==Further readings==
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* {{Cite journal
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| last = Hestrin
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| first = Shaul
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| year = 2011
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| title = The strength of electrical synapses
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| journal = Science
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| volume = 334
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| issue = 6054
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| pages = 315–316
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| doi = 10.1126/science.1213894
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| url = http://www.sciencemag.org/content/334/6054/315.short
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| accessdate = 2011-10-22
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| pmid=22021844
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}}
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* {{Cite journal
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| last = Haas
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| first = Julie S.
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| year = 2011
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| coauthors = Baltazar Zavala, Carole E. Landisman
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| title = Activity-dependent long-term depression of electrical synapses
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| journal = Science
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| volume = 334
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| issue = 6054
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| pages = 389–393
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| doi = 10.1126/science.1207502
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| url = http://www.sciencemag.org/content/334/6054/389.abstract
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| accessdate = 2011-10-22
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| pmid=22021860
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}}
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==External links==
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* {{BrainMaps|reticular+nucleus+of+thalamus}}
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*
   
 
{{Diencephalon}}
 
{{Diencephalon}}
[[Category:Neuroanatomy]]
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[[Category:Brainstem]]
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[[Category:Diencephalon]]
[[Category:Cerebrum]]
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[[Category:Central nervous system]]
 
 
{{enWP|Thalamic reticular nucleus}}
 
{{enWP|Thalamic reticular nucleus}}

Latest revision as of 20:05, August 27, 2013

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Brain: Thalamic reticular nucleus
Constudthal
Thalamus
[[Image:|250px|center|]]
Latin nucleus reticularis thalami
Gray's subject #
Part of Thalamus
Components
Artery
Vein
BrainInfo/UW hier-348
MeSH [1]

The thalamic reticular nucleus is part of the ventral thalamus that forms a capsule around the thalamus laterally. However, recent evidence from mice and fish question this statement and define it as dorsal thalamic structure.[1][2] It is separated from the thalamus by the external medullary lamina. Reticular cells are GABAergic, and have discoid dendritic arbors in the plane of the nucleus.

Thalamic Reticular Nucleus is variously abbreviated TRN, RTN, NRT, and RT.

Input and output Edit

The thalamic reticular nucleus receives input from the cerebral cortex and dorsal thalamic nuclei. Most input comes from collaterals of fibers passing through the thalamic reticular nucleus. Primary thalamic reticular nucleus efferent fibers project to dorsal thalamic nuclei, but never to the cerebral cortex. This is the only thalamic nucleus that does not project to the cerebral cortex, instead it modulates the information from other nuclei in the thalamus. Its function is modulatory on signals going through thalamus (and the reticular nucleus).

It has been suggested that the reticular nucleus receives afferent input from the reticular formation[citation needed] and in turn projects to the other thalamic nuclei, regulating the flow of information through these to the cortex. There is debate over the presence of distinct sectors within the nucleus that each correspond to a different sensory or cognitive modality.

For original connectivity anatomy see Jones 1975.[3]

For discussion of mapping and cross modality pathways see Crabtree 2002.[4]

ReferencesEdit

  1. Scholpp S, Delogu A, Gilthorpe J, Peukert D, Schindler S, Lumsden A (November 2009). Her6 regulates the neurogenetic gradient and neuronal identity in the thalamus. Proc. Natl. Acad. Sci. USA 106 (47): 19895–900.
  2. Vue TY, Bluske K, Alishahi A, et al. (April 2009). Sonic hedgehog signaling controls thalamic progenitor identity and nuclei specification in mice. J. Neurosci. 29 (14): 4484–97.
  3. Jones E (1975). Some aspects of the organization of the thalamic reticular complex. J. Comp. Neurol. 162 (3): 285–308.
  4. Crabtree JW, Isaac JT (October 2002). New intrathalamic pathways allowing modality-related and cross-modality switching in the dorsal thalamus. J. Neurosci. 22 (19): 8754–61.

Further readingsEdit

External linksEdit


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