Items tagged “neuroanatomy”
116 results found
Article
Basilar artery fenestration
Basilar artery fenestration (or more simply, basilar fenestration) is the most common intracranial arterial fenestration and most common congenital anomaly of the basilar artery. This anatomic variant is characterized by duplication of a portion of the artery that are connected proximally and di...
Article
Posterior communicating artery
The posterior communicating artery (PCom) makes up the posterior linkage in the circle of Willis.
Gross anatomy
Course
The posterior communicating artery originates from the posterior aspect of the C7 (communicating) segment of the internal carotid artery and extends posteromedially to anasto...
Article
Supraoptic recess
The supraoptic recess, also known as the optic recess or chiasmatic recess, is a small angular recess or diverticulum that sits at the junction of the floor and anterior wall of the third ventricle, immediately above the optic chiasm.
Related pathology
When the third ventricle is expanded due ...
Article
Commissural fibers of the brain
Commissural fibers of the brain, also known as commissural tracts of the brain or commissures are a type of white matter tract that cross the midline, connecting the same cortical area in opposite hemispheres (right-left hemispheric connections 3).
Commissural fibers include:
corpus callosum (...
Article
Mesial temporal lobe
The mesial temporal lobe, also known as the medial temporal lobe, is, as the name suggests, located on the medial aspect of the temporal lobe and is distinct from the rest of the lobe, which is composed of neocortex.
The term comprises five structures:
amygdala
hippocampus
uncus
dentate g...
Article
Callososeptal interface
The callososeptal interface is located on the inferior surface of the corpus callosum, where the septum pellucidum abuts it.
It came to radiological attention when T2 hyperintense lesions affecting this region were believed to be specific for multiple sclerosis. This has, as is usually the cas...
Article
Cavum veli interpositi
A cavum veli interpositi (CVI), often incorrectly termed a cavum velum interpositum, is an anatomic variation where there is a dilatation of the normal cistern of the velum interpositum. When larger than 1 cm in axial transverse measurement, with outwardly bowed margins and positive mass effect,...
Case
Ependymitis granularis
Published
30 Sep 2010
62% complete
MRI
Article
Empty sella
An empty sella, also known as an empty pituitary fossa, refers to the appearance of the sella turcica when the pituitary gland appears shrunken or invisible and CSF fills the space instead. It is commonly an incidental finding of no clinical significance, but there exists a well-established asso...
Case
Cavum septum pellucidum
Published
25 May 2013
65% complete
CT
Case
Cavum vergae and cavum septum pellucidum
Published
25 May 2013
77% complete
CT
Case
PICA termination of hypoplastic vertebral artery
Published
10 Aug 2013
87% complete
MRI
Article
Aberrant arachnoid granulations
Aberrant arachnoid granulations, also known as arachnoid pits, are arachnoid granulations that penetrated the dura but failed to migrate normally in the venous sinus. They are most often located in the greater wing of the sphenoid bone and may be seen in idiopathic intracranial hypertension. Occ...
Article
Arachnoid mater
The arachnoid mater forms the middle layer of the meninges and together with the pia mater is sometimes referred to as the leptomeninges.
Gross anatomy
The arachnoid mater is a membrane that comes into direct contact with the dura mater and is separated from the pia mater by a CSF-filled spac...
Article
Falx cerebri
The falx cerebri (plural: falxes/falces cerebrorum) is the largest of the four main folds (or septa) of the intracranial dura mater, separating the cerebral hemispheres 1.
Gross anatomy
The falx cerebri is a double-fold of dura mater that descends through the interhemispheric fissure in the m...
Article
Tentorium cerebelli
The tentorium cerebelli (plural: tentoria cerebellorum) is the second largest dural fold after the falx cerebri. It lies in the axial plane attached perpendicularly to the falx cerebri and divides the cranial cavity into supratentorial and infratentorial compartments 1. It has free and attached ...
Article
Falx cerebelli
The falx cerebelli is a small infolding of the dura in the sagittal plane over the floor of the posterior cranial fossa. It partially separates the two cerebellar hemispheres 1.
Gross anatomy
The falx cerebelli is attached posteriorly in the midline to the internal occipital crest of the occip...
Article
Cranial meninges
The cranial meninges (singular: meninx) surround the brain and are made up of four layers (from outermost to innermost):
dura mater
arachnoid mater
subarachnoid lymphatic-like membrane
pia mater
Terminology
The dura mater can also be known as the pachymeninx. The arachnoid mater and pia ma...
Article
Pia mater
The pia mater is the innermost layer of the meninges and together with the arachnoid mater is referred to as the leptomeninges. It is closely related to the surface of the brain and unlike the arachnoid mater extends into the sulci 1.
Gross anatomy
The pia mater is separated from the arachnoid...
Article
Blood supply of the meninges
The blood supply of the meninges generally concerns the blood supply of the outer layer of dura mater rather than the inner layer of dura mater, arachnoid or pia mater which do not require a large blood supply. There are several arteries that supply the dura in the anterior, middle, and posterio...
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