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<p><b>New page</b></p><div>{{Short description|Neuroanatomical structure in the brain}}<br />
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==Striosome==<br />
The '''striosome''', also known as the '''striosomal compartment''', is a distinct anatomical and functional region within the [[striatum]], a subcortical part of the [[forebrain]]. The striosome is characterized by its unique neurochemical composition and connectivity, distinguishing it from the surrounding [[matrix (neuroanatomy)|matrix]] compartment.<br />
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[[File:Matrix_Striosomes_mar5.jpg|Striosomes and matrix compartments in the striatum|thumb|right]]<br />
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==Anatomy==<br />
The striosomes are patch-like structures that are interspersed within the matrix of the striatum. They are identifiable by their high levels of [[mu-opioid receptor]] binding and distinct patterns of [[neurotransmitter]] expression. The striosomes are rich in [[substance P]] and [[enkephalin]], which are neuropeptides involved in modulating [[dopaminergic]] activity.<br />
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==Function==<br />
Striosomes play a crucial role in the regulation of [[dopamine]] signaling within the striatum. They receive input from the [[prefrontal cortex]] and are involved in processing [[reward]] and [[emotion]]. The striosomal compartment is thought to influence decision-making processes and the evaluation of [[risk]] and [[reward]].<br />
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==Connectivity==<br />
Striosomes have distinct connections compared to the matrix. They project to the [[substantia nigra pars compacta]], influencing dopaminergic neurons that project back to the striatum. This forms a feedback loop that is essential for the modulation of motor and cognitive functions.<br />
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==Development==<br />
During [[embryonic development]], striosomes are among the first structures to form within the striatum. They are believed to guide the development of the surrounding matrix and establish the initial framework for striatal organization.<br />
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==Clinical Significance==<br />
Alterations in striosomal function have been implicated in various [[neurological disorders]], including [[Parkinson's disease]], [[Huntington's disease]], and [[Tourette syndrome]]. Dysregulation of striosome-matrix interactions may contribute to the motor and cognitive symptoms observed in these conditions.<br />
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==Research==<br />
Ongoing research aims to further elucidate the role of striosomes in [[neuropsychiatric disorders]] and their potential as targets for therapeutic intervention. Advanced imaging techniques and genetic models are being used to study the specific contributions of striosomes to brain function.<br />
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==Related pages==<br />
* [[Striatum]]<br />
* [[Basal ganglia]]<br />
* [[Dopamine]]<br />
* [[Substantia nigra]]<br />
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[[Category:Neuroanatomy]]<br />
[[Category:Basal ganglia]]</div>Prab