loading...| Preferred Name |
posterior commissure |
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| Synonyms |
epithalamic commissure caudal commissure commissura epithalamica commissura posterior posterior commissure (Lieutaud) commissura epithalami |
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| Definitions |
Rounded band of white fibers crossing the middle line on the dorsal aspect of the upper end of the cerebral aqueduct. It is important in the bilateral pupillary light reflex. Its fibers acquire their medullary sheaths early, but their connections have not been definitely determined. Most of them have their origin in a nucleus, the nucleus of the posterior commissure (nucleus of Darkschewitsch), which lies in the central gray substance of the upper end of the cerebral aqueduct, in front of the nucleus of the oculomotor nerve. Some are probably derived from the posterior part of the thalamus and from the superior colliculus, whereas others are believed to be continued downward into the medial longitudinal fasciculus. The posterior commissure interconnects the pretectal nuclei, mediating the consensual pupillary light reflex[WP]. Diencephalic tract which is located in the vicinity of the dorsal diencephalon and mesencephalon and connects the pretectal nuclei. From Neuroanatomy of the Zebrafish Brain[ZFA]. |
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| ID |
http://purl.obolibrary.org/obo/UBERON_0000936 |
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| connects | ||
| database_cross_reference |
Wikipedia:Posterior_commissure BM:MB-Tec-PC neuronames:484 TAO:0000320 NCIT:C33356 BIRNLEX:1026 ZFA:0000320 EMAPA:35695 UMLS:C0152327 BAMS:PC BAMS:pc DHBA:10567 DMBA:17787 FMA:62072 HBA:9229 MA:0002743 MBA:158 |
|
| definition |
Rounded band of white fibers crossing the middle line on the dorsal aspect of the upper end of the cerebral aqueduct. It is important in the bilateral pupillary light reflex. Its fibers acquire their medullary sheaths early, but their connections have not been definitely determined. Most of them have their origin in a nucleus, the nucleus of the posterior commissure (nucleus of Darkschewitsch), which lies in the central gray substance of the upper end of the cerebral aqueduct, in front of the nucleus of the oculomotor nerve. Some are probably derived from the posterior part of the thalamus and from the superior colliculus, whereas others are believed to be continued downward into the medial longitudinal fasciculus. The posterior commissure interconnects the pretectal nuclei, mediating the consensual pupillary light reflex[WP]. Diencephalic tract which is located in the vicinity of the dorsal diencephalon and mesencephalon and connects the pretectal nuclei. From Neuroanatomy of the Zebrafish Brain[ZFA]. |
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| delineatedBy | ||
| depiction |
http://upload.wikimedia.org/wikipedia/commons/d/d7/Gray715.png |
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| editor note |
add connects relationships and check these outside mammalia |
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| external_ontology_notes |
part_of brainstem in MA; midbrain tectum in NIF |
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| has exact synonym |
epithalamic commissure caudal commissure |
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| has_obo_namespace |
uberon |
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| has_related_synonym |
commissura epithalamica commissura posterior posterior commissure (Lieutaud) commissura epithalami |
|
| id |
UBERON:0000936 |
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| in_subset |
http://purl.obolibrary.org/obo/uberon/core#vertebrate_core |
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| label |
posterior commissure |
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| notation |
UBERON:0000936 |
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| only in taxon | ||
| part_of | ||
| prefLabel |
posterior commissure |
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| treeView | ||
| subClassOf |