Items tagged “neuroanatomy”
116 results found
Article
Innervation of the meninges
The sensory innervation of the meninges is primarily by meningeal branches of both the trigeminal and vagus nerves with a smaller contribution from the upper cervical spinal nerves 1,2. The supratentorial dura mater is mainly supplied by the ophthalmic division of the trigeminal nerve 3. Like th...
Article
Foramen magnum
The foramen magnum is the largest foramen of the skull and is part of the occipital bone 1. It is oval in shape with a large anteroposterior diameter 2.
Gross anatomy
The foramen magnum is found in the most inferior part of the posterior cranial fossa 3. It is traversed by vital structures inc...
Article
Extradural space
The extradural (epidural) space is a potential space between the cranial bones and the endosteal layer of the dura mater, which is otherwise adherent to the cranial bone.
Gross anatomy
The extradural space is a potential space inside the cranial vault and is not normally appreciable unless th...
Article
Subdural space
The subdural space (epiarachnoid space) is a potential space that exists between the meningeal layer of the dura mater and the inner arachnoid mater of the leptomeninges which are adherent to each other 1.
Gross anatomy
The meningeal layer of dura mater is usually adherent to the underlying ar...
Article
Diaphragma sellae
The diaphragma sellae is one of the folds (or reflections) of the dura mater. It covers the sella turcica and forms the roof over the pituitary fossa 1.
Gross anatomy
The diaphragma sellae consists of two horizontal leaves of dura mater on the sphenoid bone. It extends from the tuberculum sell...
Article
Frontal lobe
The frontal lobe is by far the largest of the four lobes of the cerebrum (other lobes: parietal lobe, temporal lobe, and occipital lobe), and is responsible for many of the functions which produce voluntary and purposeful action.
Gross anatomy
The frontal lobe is the largest lobe accounting fo...
Article
Broca's area
Broca's area (Brodmann areas 44 and 45) is an area of the lateral frontal lobe in the dominant hemisphere concerned with the production of speech.
Gross anatomy
Broca's area is located in the posterior inferior frontal gyrus (pars opercularis (Brodmann area 44) and pars triangularis (Brodmann ...
Article
Gyrus rectus
The gyrus rectus, or straight gyrus, is located at the most medial margin of the inferior surface of the frontal lobe 1,2. Its function is unclear but it may be involved in higher cognitive function (e.g. personality) 3.
Gross anatomy
The gyrus rectus is bounded medially by the interhemispheri...
Article
Orbital gyrus
The orbital gyri are located on the inferior surface of the frontal lobe. There are four gyri and they are divided by the H-shaped orbital sulci. They have a role in the perception of odors.
Gross anatomy
The medial orbital gyrus is separated from the gyrus rectus (or straight gyrus) by the ...
Article
Cingulate gyrus
The cingulate gyrus lies on the medial aspect of the cerebral hemisphere. It forms a major part of the limbic system which has functions in emotion and behavior. The frontal portion is termed the anterior cingulate gyrus (or cortex) 1,2.
Gross anatomy
Location
The cingulate gyrus extends fro...
Article
Entorhinal cortex
The entorhinal cortex (plural: cortices) (a.k.a. Brodmann area 28) is located in the mesial temporal lobe and acts as the interface between the hippocampus and the neocortex. It has been considered part of the hippocampal formation (along with Ammon’s horn, subiculum and presubiculum), but is di...
Article
Foramen cecum (skull)
The foramen cecum of the anterior cranial fossa represents a primitive tract into the nasal space. It is located along the anterior cranial fossa, anterior to the cribriform plate of the ethmoid bone and posterior to the frontal bone, within the frontoethmoidal suture. It lies at a variable dist...
Article
Foramen lacerum
The foramen lacerum (plural: foramina lacera) is a triangular opening located in the middle cranial fossa formed by the continuation of the petrosphenoidal and petroclival fissures. Thus, it is a gap between bones, alternatively termed the sphenopetroclival synchondrosis, rather than a true for...
Article
Foramen rotundum
The foramen rotundum (plural: foramina rotunda) is located in the middle cranial fossa, inferomedial to the superior orbital fissure at the base of greater wing of the sphenoid bone. Its medial border is formed by lateral wall of sphenoid sinus. It runs downwards and laterally in an oblique path...
Article
Spinal epidural space
The spinal epidural (extradural) space is distinctly separate from and not continuous with the cranial epidural space. Its exact definition and description are contentious 3.
Gross anatomy
The spinal epidural space is located in the spinal canal between the spinal dura mater and the vertebral...
Article
Internal capsule
The internal capsule (TA: capsula interna) is a deep subcortical structure that contains a concentration of afferent and efferent white matter projection fibers. Anatomically, this is an important area because of the high concentration of both motor and sensory projection fibers 1,2. Afferent fi...
Article
Nervus intermedius
The nervus intermedius, also known as intermediate nerve of Wrisberg, is a part of the facial nerve (CN VII) which contains somatic sensory, special sensory, and visceral motor (secretomotor) fibers 1.
Gross anatomy
Nuclei
superior salivatory nucleus 7
forms the parasympathetic root (general...
Article
Axis (C2)
The axis is the second cervical vertebra, commonly called C2. It is an atypical cervical vertebra with unique features and important relations that make it easily recognisable. Its most prominent feature is the odontoid process (also know as the dens or peg), which is embryologically the body of...
Case
Amygdala anatomy (coronal T2WI MRI)
Published
18 Jan 2015
36% complete
Diagram
MRI
Article
Basal nucleus of Meynert
The basal nucleus of Meynert, also known as the nucleus basalis of Meynert, is formed by a group of cells that lies in the substantia innominata. It is rich in acetylcholine and its degeneration has been correlated to Alzheimer disease. It lies anterior to the anterior commissure.
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