出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2016/01/03 20:33:07」(JST)
Ganglion | |
---|---|
Micrograph of a ganglion. H&E stain.
|
|
Details | |
Latin | ganglion |
Identifiers | |
TA | A14.2.00.002 |
FMA | 5884 |
Anatomical terminology |
In anatomy, a ganglion (/ˈɡæŋɡliən/ GANG-glee-ən; plural ganglia) is a nerve cell cluster[1] or a group of nerve cell bodies located in the autonomic nervous system.[2][3] Ganglia house the cell bodies of afferent nerves.
In neurological contexts, ganglia are composed mainly of somata and dendritic structures which are bundled or connected. Ganglia often interconnect with other ganglia to form a complex system of ganglia known as a plexus. Ganglia provide relay points and intermediary connections between different neurological structures in the body, such as the peripheral and central nervous systems.
Among vertebrates there are three major groups of ganglia:
In the autonomic nervous system, fibers from the central nervous system to the ganglia are known as preganglionic fibers, while those from the ganglia to the effector organ are called postganglionic fibers.
The term "ganglion" refers to the peripheral nervous system.[4]
However, in the brain (part of the central nervous system), the "basal ganglia", or basal nuclei, is a group of nuclei interconnected with the cerebral cortex, thalamus and brainstem, associated with a variety of functions: motor control, cognition, emotions, and learning.
Partly due to this ambiguity, the Terminologia Anatomica recommends using the term basal nuclei instead of basal ganglia; however, this usage has not been generally adopted.
A pseudoganglion is a localized thickening of the main part or trunk of a nerve that has the appearance of a ganglion[5] but has only nerve fibres and no nerve cell bodies.
Pseudoganglia are found in the teres minor muscle[6] and radial nerve.[citation needed]
In the CNS, such a group is called a nucleus and in the peripheral nervous system (PNS), a ganglion.
全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.
リンク元 | 「節」「node」「nodal」「knot」「ganglionic」 |
拡張検索 | 「basal ganglia disease」「basal ganglia disorder」「parasympathetic ganglia」 |
.