Corpus striatum

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Brain: Corpus striatum
Diagrammatic coronal section of brain to show relations of neopallium. Cs. Corpus striatum. Th. Thalamus.
Two views of a model of the striatum: A, lateral aspect; B, mesal aspect.
Gray's	subject #189 833
NeuroNames	ancil-255
MeSH	Corpus+Striatum

The corpus striatum (striated body) is a compound structure consisting of the striatum and the globus pallidus.^[1]

Contents 1 Definitions 2 Appearance 3 Anatomy 4 References 5 External links 6 See also

[edit] Definitions

The term has been used in a few different ways:

• It is sometimes used as another term for the basal ganglia.^{[citation needed]}

• It may also refer to both the basal ganglia and internal capsule collectively. ^[2]

• According to the 1917 version of Gray's Anatomy, it is the combination of the lentiform nucleus (also known as the lenticular nucleus) and the caudate nucleus

• According to BrainInfo it is a part of the basal ganglia comprising the globus pallidus and striatum.^[3]

[edit] Appearance

From lateral to medial, the corpus striatum is composed of the external capsule (white matter), the lentiform nucleus (gray matter), the internal capsule (white matter), and the caudate nucleus (gray matter). The alternating white and gray matter give it a striated appearance.

[edit] Anatomy

The corpus striatum has received its name from the striped appearance which a section of its anterior part presents, in consequence of diverging white fibers being mixed with the gray substance which forms its chief mass.

A part of the corpus striatum is imbedded in the white substance of the hemisphere, and is therefore external to the ventricle; it is termed the extraventricular portion, or the lenticular nucleus.

The remainder, however, projects into the ventricle, and is named the intraventricular portion, or the caudate nucleus.

[edit] References

[edit] External links

• University of Manitoba
• Definition of NDIF
• Image at Merck

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

[edit] See also

• striatum

v • d • e Brain - Basal ganglia Rostral, telencephalon (corpus striatum) striatum: Putamen - Caudate nucleus lentiform nucleus: Putamen - Globus pallidus (GPe, GPi) Caudal, diencephalon Subthalamic nucleus Caudal, mesencephalon Substantia nigra (Pars compacta, Pars reticulata) Paths direct: Motor cortex → Striatum → GPi → Subthalamic fasciculus → Thalamus → Motor cortex indirect: Motor cortex → Striatum → GPe → Subthalamic nucleus → GPi → Subthalamic fasciculus → Thalamus → Motor cortex nigrostriatal pathway: Pars compacta → Striatum note: nucleus accumbens, claustrum and amygdala are considered part of basal ganglia by some sources