rhinencephalon

Part of the cerebrum concerned with the reception and integration of olfactory impulses.

1. the part of the brain once thought to be concerned entirely with olfactory mechanisms, including olfactory nerves, bulbs, tracts and subsequent connections (all olfactory in function) and the limbic system (not primarily olfactory in function); homologous with olfactory portions of the brain in lower animals.
2. one of the parts of the embryonic telencephalon.

Brain: Rhinencephalon
Scheme of rhinencephalon
Gray's	subject #189 826
NeuroNames	ancil-241
MeSH	Rhinencephalon

In animal anatomy, the rhinencephalon is a part of the brain involved with olfaction.

Components

The term "Rhinencephalon" has been used to describe different structures at different points in time.^[1]

One definition includes the olfactory bulb, olfactory tract, anterior olfactory nucleus,anterior perforated substance, medial olfactory stria, lateral olfactory stria, parts of the amygdala and prepyriform area.^[2]

Some references classify other areas of the brain related to perception of smell as rhinencephalon, but the areas of human brains that receive fibers strictly from the olfactory bulb are limited to those of the paleopallium. As such, the rhinencephalon includes the olfactory bulb, the olfactory tract, the olfactory tubercle and striae, the anterior olfactory nucleus and parts of the amygdala and the piriform cortex.

References

1. ^ Terence R. Anthoney (1994). Neuroanatomy and the neurologic exam: a thesaurus of synonyms, similar-sounding non-synonyms, and terms of variable meaning. Boca Raton: CRC Press. pp. 311. ISBN 0-8493-8631-4. 
2. ^ http://braininfo.rprc.washington.edu/AncilDefinition.aspx?ID=2078&questID=2078

External links

• Cranial Nerves at Yale 1-5
• Rhinencephalon at eMedicine Dictionary

This neuroanatomy article is a stub. You can help Wikipedia by expanding it. v • d • e

v • d • e Human brain, cerebrum, Interior of the cerebral hemispheres - Rostral Basal ganglia and associated structures (TA A14.1.09.321-552, GA 9.832-837) Basal ganglia Grey matter Corpus striatum striatum: Putamen · Caudate nucleus lentiform nucleus: Putamen · Globus pallidus (GPe, GPi) Ventral striatum Nucleus accumbens · Olfactory tubercle · Islands of Calleja Other Amygdala · Claustrum White matter Semioval center Internal capsule (Anterior limb · Genu · Posterior limb, Optic radiation) Corona radiata · External capsule · Extreme capsule Pallidothalamic connections: Ansa lenticularis · Lenticular fasciculus · Subthalamic fasciculus · Thalamic fasciculus Rhinencephalon Grey matter Anterior olfactory nucleus · Anterior perforated substance · Olfactory bulb White matter Olfactory tract · Olfactory trigone Other basal forebrain Grey matter Substantia innominata (Basal optic nucleus of Meynert) · Nucleus of diagonal band White matter Diagonal band of Broca · Terminal stria Archicortex: Hippocampal formation/ Hippocampus anatomy Grey matter Hippocampus proper: CA1 · CA2 · CA3 · CA4 Dentate gyrus: Fascia dentata Subiculum White matter Alveus · Fimbria · Perforant path

v • d • e Sensory system: Olfactory system / Olfaction / Rhinencephalon (TA 15.1, GA 10.992) Path Olfactory glands Olfactory epithelium / Olfactory receptor / Olfactory mucosa / Olfactory receptor neurons → Olfactory nerve → Olfactory bulb (Mitral cells, Glomeruli) Olfactory tract → Piriform cortex → Entorhinal cortex → Amygdala → Brodmann area 34 Region Olfactory trigone olfaction navs: anatomy, symptoms/signs

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