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(Inputs to the solitary nucleus)
(Redirected page to Nucleus of the solitary tract)
 
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{{BioPsy}}
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#redirect[[Nucleus of the solitary tract]]
{{Infobox Brain|
 
Name = {{PAGENAME}} |
 
Latin = tractus solitarius medullae oblongatae |
 
GraySubject = |
 
GrayPage = |
 
Image = Gray696.png |
 
Caption = The [[cranial nerve nuclei]] schematically represented; dorsal view. Motor nuclei in red; sensory in blue. |
 
Image2 = Gray648.png |
 
Caption2 = Transverse section of [[medulla oblongata]] of human [[embryo]]. |
 
IsPartOf = |
 
Components = |
 
Artery = |
 
Vein = |
 
BrainInfoType = hier |
 
BrainInfoNumber = 739 |
 
MeshName = Solitary+Nucleus |
 
MeshNumber = A08.186.211.132.810.406.750 |
 
DorlandsPre = t_15 |
 
DorlandsSuf = 12817166 |
 
}}
 
The '''solitary nucleus''' and '''tract''' are structures in the [[brainstem]] that carry and receive visceral sensation and [[taste]] from the [[facial nerve|facial]] (VII), [[glossopharyngeal nerve|glossopharyngeal]] (IX), [[vagus nerve|vagus]] (X) [[cranial nerves]], as well as the cranial part of the [[accessory nerve]] (XI).
 
 
==Anatomy==
 
 
The nucleus is located along the length of the medulla (with a small portion in the lower [[pons]]). The solitary tract runs in the middle of the nucleus, creating a speck of [[white matter]] (axons of the tract), surrounded by [[grey matter]] (the nucleus). This stands out on a stained section, which is where the name solitary comes from.
 
 
The solitary nucleus is divided into a rostral (towards the top) [[gustatory nucleus]] and caudal (towards the bottom) [[cardiorespiratory nucleus]]. The cardiorespiratory nucleus can be further divided into a cardiovascular center, which sits at the midline of the nucleus, and a respiratory center, which is located laterally.
 
 
==Inputs to the solitary nucleus==
 
 
As well as [[taste]] from nerves VII, IX and X, the solitary nucleus handles information from the [[carotid body|carotid]] (from IX) and [[Aortic body|aortic bodies]] and [[baroreceptor]]s (from X), which controls blood volume.
 
 
Information about the gut wall, as well as stretch of the lungs and dryness of mucous membranes, also [[synapse]]s at the solitary nucleus.
 
 
==Outputs from the solitary nucleus==
 
 
From the solitary nucleus, most information goes to the [[hypothalamus]] and [[cingulate gyrus]], as well as to other nuclei in the brainstem (such as visceral motor or respiratory centres). There is not much conscious awareness of visceral sensation (visceral pain is not part of this system), most results are reflexes or unconscious.
 
 
==Additional images==
 
<gallery>
 
Image:Gray694.png|Section of the medulla oblongata at about the middle of the olive.
 
Image:Gray697.png|Nuclei of origin of cranial motor nerves schematically represented; lateral view.
 
Image:Gray698.png|Primary terminal nuclei of the afferent (sensory) cranial nerves schematically represented; lateral view.
 
</gallery>
 
 
==External links==
 
* [http://cal.vet.upenn.edu/neuro/server/slides/ns_024-NS.jpg Slide at University of Pennsylvania]
 
* {{BrainMaps|solitary%20tract|solitary tract}}
 
 
{{Rhombencephalon}}
 
 
[[Category:Nervous system]]
 
 
[[Category:Medulla oblongata]]
 
{{enWP|Solitary nucleus}}
 

Latest revision as of 15:14, December 16, 2012

  1. redirectNucleus of the solitary tract

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