Wiki Archives - Wiki Point

Area postrema – Wiki Point

July 19, 2022

Medullary structure in the brain that controls vomiting The area postrema, a paired structure in the medulla oblongata of the brainstem,[1] is a circumventricular organ having permeable capillaries and sensory neurons that enable its dual role to detect circulating chemical messengers in the blood and transduce them into neural signals and networks.[2][3][4] Its position adjacent… read more »

Arcuate nucleus – Wiki Point

July 19, 2022

The arcuate nucleus of the hypothalamus (also known as ARH,[1] ARC,[2] or infundibular nucleus[2][3]) is an aggregation of neurons in the mediobasal hypothalamus, adjacent to the third ventricle and the median eminence. The arcuate nucleus includes several important and diverse populations of neurons that help mediate different neuroendocrine and physiological functions, including neuroendocrine neurons, centrally… read more »

Arcuate line – Wiki Point

July 19, 2022

In anatomy, an arcuate line is any composition that is curvilinear. [edit] Subjects referred to by the very same expression

Arcopallium – Wiki Point

July 19, 2022

The arcopallium refers to locations of the avian brain which partially overlap regions homologous to the amygdala of mammals. These areas have formerly been referred to as archistriatum, and just before this epistriatum or amygdaloid complex,[1] and a the latest alter of nomenclature has divided the region into the arcopallium and posterior pallial amygdala.[2] The… read more »

Archicortex – Wiki Point

July 19, 2022

Phylogenetically oldest part of the cerebral cortex or pallium The archicortex, or archipallium, is the phylogenetically oldest region of the brain’s cerebral cortex. It is often considered contiguous with the olfactory cortex, but its extent varies among species. In older species, such as fish, the archipallium makes up most of the cerebrum. Amphibians develop an… read more »

Archicortex – Wiki Point

July 19, 2022

Phylogenetically oldest part of the cerebral cortex or pallium The archicortex, or archipallium, is the phylogenetically oldest region of the brain’s cerebral cortex. It is often considered contiguous with the olfactory cortex, but its extent varies among species. In older species, such as fish, the archipallium makes up most of the cerebrum. Amphibians develop an… read more »

Cerebellum – Wiki Point

July 19, 2022

Structure at the rear of the vertebrate brain, beneath the cerebrum This article is about the smaller region in the lower part of the brain. For the large region of the brain, see Cerebrum. The cerebellum (Latin for “little brain”) is a major feature of the hindbrain of all vertebrates. Although usually smaller than the… read more »

Arbor vitae (anatomy) – Wiki Point

July 19, 2022

White issue of the cerebellum The arbor vitae (Latin for “tree of life”) is the cerebellar white subject, so named for its branched, tree-like visual appeal. In some means it a lot more resembles a fern and is existing in both of those cerebellar hemispheres.[1] It delivers sensory and motor info to and from the… read more »

Arachnoid granulation – Wiki Point

July 19, 2022

Protrusions of the arachnoid mater for returning cerebrospinal fluid to circulation Arachnoid granulations (also arachnoid villi, and pacchionian granulations or bodies) are smaller protrusions of the arachnoid mater (the thin second layer masking the mind) into the outer membrane of the dura mater (the thick outer layer). They protrude into the dural venous sinuses of… read more »

Arachnoid mater – Wiki Point

July 19, 2022

Web-like middle layer of the three meninges The arachnoid mater (or simply arachnoid) is one of the three meninges, the protective membranes that cover the brain and spinal cord. It is so named because of its resemblance to a spider web. The arachnoid mater is a derivative of the neural crest mesectoderm in the embryo…. read more »