For the female genital structure, see Posterior commissure of labia majora.
Posterior commissure
Sagittal cross-section of the human brain. The posterior commissure is labelled at center top.
The posterior commissure labelled on a human brain
Details
Part of
Human brain
Identifiers
Latin
commissura posterior
MeSH
D066243
NeuroNames
484
NeuroLex ID
birnlex_1026
TA98
A14.1.08.416
TA2
5749
FMA
62072
Anatomical terms of neuroanatomy
[edit on Wikidata]
The posterior commissure (also known as the epithalamic commissure) is a rounded band of white fibers crossing the middle line on the dorsal aspect of the rostral end of the cerebral aqueduct. It is important in the bilateral pupillary light reflex.[citation needed] It constitutes part of the epithalamus.[1]
Its fibers acquire their medullary sheaths early, but their connections have not been definitively determined. Most of them have their origin in a nucleus, the nucleus of the posterior commissure (nucleus of Darkschewitsch), which lies in the periaqueductal grey at rostral end of the cerebral aqueduct, in front of the oculomotor nucleus. Some are thought to be 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.
For the pupillary light reflex, the olivary pretectal nucleus innervates both Edinger-Westphal nuclei. To reach the contralateral Edinger-Westphal nucleus, the axons cross in the posterior commissure.
^Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42 ed.). p. 501. ISBN 978-0-7020-7707-4. OCLC 1201341621.
and 27 Related for: Posterior commissure information
another commissure, the posterior labial commissure, which is also the posterior boundary of the vulva. The interval between the posteriorcommissure and...
The posteriorcommissure (also known as the epithalamic commissure) is a rounded band of white fibers crossing the middle line on the dorsal aspect of...
anterior commissure, which is below the mons pubis and above the clitoris. To the posterior, the labia majora join at the posteriorcommissure, which is...
are the anterior commissure, posteriorcommissure, corpus callosum, commissure of fornix (hippocampal commissure), habenular commissure, ventral supraoptic...
labia minora (fourchette or posteriorcommissure of the labia minora) is a frenulum where the labia minora meet posteriorly. The fourchette may be torn...
tracts that include the corpus callosum, the anterior commissure, and the posteriorcommissure. The corpus callosum is the largest commissural tract in...
the sense of smell and chemoreception. The anterior commissure works with the posteriorcommissure to link the two cerebral hemispheres of the brain and...
medullaris, the anterior and posterior paraventricular nuclei, the posteriorcommissure, and the pineal gland. The function of the epithalamus is to connect...
levels. Caudal of the pineal gland is the posterior commissure; nerve fibres reach the posteriorcommissure from the adjacent midbrain, but their onward connection...
large bundle of nerve fibers. Smaller commissures, including the anterior commissure, the posteriorcommissure and the fornix, also join the hemispheres...
clitoral hood, frenulum clitoridis, and the clitoral glans. Posterior to it is the posteriorcommissure of the labia minora and the frenulum of labia minora...
through the midline of the scrotum (scrotal raphe) and upwards through the posterior midline aspect of the penis (penile raphe). It also exists deeper through...
interhemispheric communication is still possible via the anterior commissure and posteriorcommissure. "Efficacy and relatively low permanent morbidity in corpus...
which interfere with the basic functions of neurons Posterior cortical atrophy: In the most posterior area of the brain lies the visual cortex, the area...
vulva. The labia majora meet at the front of the mons pubis, and meet posteriorly at the urogenital triangle (the anterior part of the perineum) between...
Labial commissures may refer to: Anterior commissure of labia majora (commissura labiorum anterior) Posteriorcommissure of labia majora (commissura labiorum...
aqueduct. The name of the SCO comes from its location beneath the posteriorcommissure, a bundle of nerve fibers interconnecting parts of the two hemispheres...
nuclei Medial and lateral habenular nuclei Stria medullaris thalami Posteriorcommissure Pineal body Subthalamus The optic nerve (CNII) attaches to the diencephalon...
between the bottom of the vulval vestibule and the labia majora. The posterior ends (bottom) of the labia minora are usually joined across the middle...
body from moving inferiorly and anteriorly. The round ligaments restrict posterior movement of the uterus. The cardinal ligaments also prevent the inferior...
grey commissure is a thin strip of grey matter that surrounds the central canal of the spinal cord and, along with the anterior white commissure, connects...
provide support for the inverted skin flap. A drain was left in the posteriorcommissure and, finally, excess scrotal skin was resected to obtain a good appearance...
Global Information
