Gracile nucleus: Difference between revisions
No edit summary |
m (Robot: Automated text replacement (-{{SIB}} + & -{{EH}} + & -{{EJ}} + & -{{Editor Help}} + & -{{Editor Join}} +)) |
||
| (2 intermediate revisions by one other user not shown) | |||
| Line 5: | Line 5: | ||
GrayPage = 774 | | GrayPage = 774 | | ||
Image = Gray688.png | | Image = Gray688.png | | ||
Caption = Section of the [[medulla oblongata]] at the level of the [[decussation]] of the | Caption = Section of the [[medulla oblongata]] at the level of the [[decussation]] of the pyramids. [[Gracile nucleus]] is #8. | | ||
Image2 = Gray691.png | | Image2 = Gray691.png | | ||
Caption2 = Dissection of | Caption2 = Dissection of brain-stem. Dorsal view. ("nucleus gracilis" is labeled on left, second from the bottom.) | | ||
IsPartOf = | | IsPartOf = | | ||
Components = | | Components = | | ||
| Line 19: | Line 19: | ||
DorlandsSuf = 12581325 | | DorlandsSuf = 12581325 | | ||
}} | }} | ||
{{SI}} | {{SI}} | ||
==Overview== | ==Overview== | ||
Located in the [[medulla oblongata]], the '''gracile nucleus''' is one of the [[dorsal column nuclei]] that participates in the sensation of [[touch|fine touch]] and [[proprioception]]. It contains second-order [[neuron]]s of the | Located in the [[medulla oblongata]], the '''gracile nucleus''' is one of the [[dorsal column nuclei]] that participates in the sensation of [[touch|fine touch]] and [[proprioception]]. It contains second-order [[neuron]]s of the dorsal column-medial lemniscus system which receive inputs from [[sensory neuron]]s of the [[dorsal root ganglia]] and send [[axon]]s that synapse in the [[thalamus]]. | ||
The [[neuron]]s contained within the [[nucleus (neuroanatomy)|nucleus]] form a visible bump called the '''gracile tubercle''' on the posterior side of the closed medulla at the floor of the [[fourth ventricle]]. | The [[neuron]]s contained within the [[nucleus (neuroanatomy)|nucleus]] form a visible bump called the '''gracile tubercle''' on the posterior side of the closed medulla at the floor of the [[fourth ventricle]]. | ||
The gracile nucleus and [[Fasciculus gracilis|fasciculus]] carry | The gracile nucleus and [[Fasciculus gracilis|fasciculus]] carry epicritic, [[kinesthetic]], and conscious [[proprioceptive]] information from the lower part of the body (below the level of T6 in the spinal cord). The counterpart to the gracile nucleus and fasciculus is the [[cuneate nucleus]] and [[Fasciculus cuneatus|fasciculus]], which carries the same type of information, but from the upper body (above T6, excepting the [[face]] and [[ear]] - the information from the face and ear is carried by the primary sensory trigeminal nucleus). | ||
==Additional images== | ==Additional images== | ||
| Line 48: | Line 48: | ||
{{Rhombencephalon}} | {{Rhombencephalon}} | ||
[[Category:Central nervous system]] | [[Category:Central nervous system]] | ||
[[Category:Perception]] | [[Category:Perception]] | ||
{{WH}} | {{WH}} | ||
{{WikiDoc Sources}} | {{WikiDoc Sources}} | ||
Latest revision as of 15:38, 9 August 2012
|
WikiDoc Resources for Gracile nucleus |
|
Articles |
|---|
|
Most recent articles on Gracile nucleus Most cited articles on Gracile nucleus |
|
Media |
|
Powerpoint slides on Gracile nucleus |
|
Evidence Based Medicine |
|
Clinical Trials |
|
Ongoing Trials on Gracile nucleus at Clinical Trials.gov Trial results on Gracile nucleus Clinical Trials on Gracile nucleus at Google
|
|
Guidelines / Policies / Govt |
|
US National Guidelines Clearinghouse on Gracile nucleus NICE Guidance on Gracile nucleus
|
|
Books |
|
News |
|
Commentary |
|
Definitions |
|
Patient Resources / Community |
|
Patient resources on Gracile nucleus Discussion groups on Gracile nucleus Patient Handouts on Gracile nucleus Directions to Hospitals Treating Gracile nucleus Risk calculators and risk factors for Gracile nucleus
|
|
Healthcare Provider Resources |
|
Causes & Risk Factors for Gracile nucleus |
|
Continuing Medical Education (CME) |
|
International |
|
|
|
Business |
|
Experimental / Informatics |
Overview
Located in the medulla oblongata, the gracile nucleus is one of the dorsal column nuclei that participates in the sensation of fine touch and proprioception. It contains second-order neurons of the dorsal column-medial lemniscus system which receive inputs from sensory neurons of the dorsal root ganglia and send axons that synapse in the thalamus.
The neurons contained within the nucleus form a visible bump called the gracile tubercle on the posterior side of the closed medulla at the floor of the fourth ventricle.
The gracile nucleus and fasciculus carry epicritic, kinesthetic, and conscious proprioceptive information from the lower part of the body (below the level of T6 in the spinal cord). The counterpart to the gracile nucleus and fasciculus is the cuneate nucleus and fasciculus, which carries the same type of information, but from the upper body (above T6, excepting the face and ear - the information from the face and ear is carried by the primary sensory trigeminal nucleus).
Additional images
-
Decussation of pyramids.
-
Dissection of brain-stem. Lateral view.
-
Deep dissection of brain-stem. Lateral view.
-
Superior terminations of the posterior fasciculi of the medulla spinalis.
-
Section of the medulla oblongata at about the middle of the olive.
-
Diagram showing the course of the arcuate fibers.
-
The formatio reticularis of the medulla oblongata, shown by a transverse section passing through the middle of the olive.
-
Scheme showing the course of the fibers of the lemniscus; medial lemniscus in blue, lateral in red.
-
Transverse section passing through the sensory decussation.
-
Deep dissection of cortex and brain-stem.
-
The sensory tract.
External links
Template:Rhombencephalon Template:WH Template:WikiDoc Sources