Substantia nigra

Brain: Substantia nigra

Section through superior colliculus showing path of oculomotor nerve. The superior colliculus ( Latin, higher hill) is a paired structure that is part of the Brain 's tectal area. The oculomotor nerve is the third of twelve paired Cranial nerves.

Coronal slices of human brain showing the basal ganglia, globus pallidus: external segment (GPe), subthalamic nucleus (STN), globus pallidus: internal segment (GPi), and substantia nigra (SN, red). A coronal plane (also known as the frontal plane) is any vertical plane that divides the body into Anterior and Posterior (belly and back sections The basal ganglia (or basal nuclei) are a group of nuclei in the Brain interconnected with the Cerebral cortex, Thalamus and The globus pallidus ( Latin for "pale globe" is a sub- cortical structure of the Brain. The subthalamic nucleus is a small lens-shaped nucleus in the Brain where it is a part of the Basal ganglia system The globus pallidus ( Latin for "pale globe" is a sub- cortical structure of the Brain. The right section is the deeper one, closer to the back of the head.
Gray's	subject #188 802
Part of	Midbrain, Basal ganglia
NeuroNames	hier-527
MeSH	Substantia+Nigra

The substantia nigra (Latin for "black substance", Sömmering) or locus niger is a heterogeneous portion of the midbrain, separating the pes (foot) from the tegmentum (covering), and an accessory to the basal ganglia system. This is a list of the subjects in Gray's Anatomy: IX Neurology In biological anatomy the mesencephalon (or midbrain) comprises the Tectum (or corpora quadrigemini Tegmentum, the ventricular mesocoelia (or "iter" The basal ganglia (or basal nuclei) are a group of nuclei in the Brain interconnected with the Cerebral cortex, Thalamus and NeuroNames is a system of nomenclature for the human and/or macaque Brain. Medical Subject Headings ( MeSH) is a huge Controlled vocabulary (or metadata system for the purpose of indexing journal articles and books Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. Samuel Thomas von Sömmerring ( 28 January 1755 &ndash 2 March 1830) was a German Physician, Anatomist, In biological anatomy the mesencephalon (or midbrain) comprises the Tectum (or corpora quadrigemini Tegmentum, the ventricular mesocoelia (or "iter" The basal ganglia (or basal nuclei) are a group of nuclei in the Brain interconnected with the Cerebral cortex, Thalamus and

1 Components
2 Additional images
3 See also
4 References
5 External links

Components

It consists of two strongly contrasted ensembles, the pars compacta and adjacent dopaminergic groups, and another ensemble made up of the pars reticulata and the pars lateralis. The pars compacta is a portion of the Substantia nigra. Anatomy The pars compacta contains Neurons which in humans are coloured black by the The pars reticulata is a portion of the Substantia nigra. Anatomy Neurons in the pars reticulata are much less densely packed than those in the compacta (they The latter two, along with the pallidal nuclei, are elements of the core of the basal ganglia. The basal ganglia (or basal nuclei) are a group of nuclei in the Brain interconnected with the Cerebral cortex, Thalamus and Although intricate and interconnected, the two ensembles must imperatively be distinguished.

The substantia nigra compacta and surrounding is responsible for dopamine production in the brain, and therefore plays a vital role in reward and addiction. Dopamine is a Hormone and Neurotransmitter occurring in a wide variety of animals including both vertebrates and invertebrates In neuroscience the reward system is a collection of brain structures which attempts to regulate and control behavior by inducing pleasurable effects The term " addiction " is used in many contexts to describe an obsession compulsion or excessive Physical dependence or psychological dependence such as

Additional images

Schematic representation of the chief ganglionic categories (I to V).	Deep dissection of brain-stem. Lateral view.	Deep dissection of brain-stem. Ventral view.	Coronal section through mid-brain.
Transverse section of mid-brain at level of inferior colliculi.	Transverse section of mid-brain at level of superior colliculi.	Coronal section of brain immediately in front of pons.	Human brain frontal (coronal) section
Dopamine and serotonin

References

External links

The basal ganglia (or basal nuclei) are a group of nuclei in the Brain interconnected with the Cerebral cortex, Thalamus and The brain stem (or brainstem) is the lower part of the Brain, adjoining and structurally continuous with the Spinal cord. The cerebral peduncle, by most classifications is everything in the Mesencephalon except the Tectum. Dopamine is a Hormone and Neurotransmitter occurring in a wide variety of animals including both vertebrates and invertebrates In biological anatomy the mesencephalon (or midbrain) comprises the Tectum (or corpora quadrigemini Tegmentum, the ventricular mesocoelia (or "iter" Anatomical regions of the brain are listed vertically following hierarchies that are standard in Neuroanatomy. Parkinson's disease (also known as Parkinson disease or PD) is a degenerative disorder of the Central nervous system that often impairs the sufferer's BrainMaps is an NIH -funded interactive zoomable high-resolution digital brain atlas and virtual microscope that is based on more than 20 million megapixels (50 terabytes

Dictionary

-noun

The name given to the dopaminergic pars in the tegmentum, which is naturally colored black.
Another part is the pars reticulata GABAergic close to pallidum
The nucleus which is damaged in the brain of Parkinson's and Parkinsonian patients.

© 2009 citizendia.org; parts available under the terms of GNU Free Documentation License, from http://en.wikipedia.org
network: | |

Contents