Hypothalamus- The Functions

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The nuclei of hypothalamus are divided into three groups

(1)Anterior (or) Preoptic group

(2) Middle (or) tuberal group

(3)Posterior (or) mamillary group

Anterior group : – Preoptic nucleus

Paraventricular nucleus

Anterio nucleus

Supraoptic nucleus.

Middle group : – Dorsomedial nucleus

Ventromedial

Lateral nucleus

Arcuate nucles

Posterior group : -Posterior nucleus

Mamillary body

CONNECTIONS OF HYPOTHALAMUS

AFFERENT CONNECTIONS TO HYPOTHALAMUS

(1)Medial forebrain bundle : – From rhinencephalon to preoptic

nucleus, Lateral nucleus and mamillary body.

(2)Fornix : – From hippocamupus to mamillary body

(3) Strioterminalis : – From amygdaloid to preoptic nucleus

(4)Corticohypothalamus fibers: – From pre frontal area and

precentral area of cerebral cortex to the supra optic and

paraventricular nuclei of hypothalamus.

(5)Thalamohypothalamic fibers:- Dorsomedial and midline

nuclei of thalamus to diffused areas of hypothalamus.

(6) Fibers from reticular formation of brain stem diffused areas

of hypothalamus.

(7) Fibers from retina to supraoptic and ventromedial nuclei of

hypothalamus.

EFFERENT CONNECTIONS FROM HYPOTHALAMUS

(1)Mamillothalamic tract : From mamillary body to anterior

Thalamic nuclei

(2) Mamillotegmental tract : From mamillary body to the tegmental

nuclei of midbrain.

(3)Periventricular fibers : – Fibers from posterior supraoptic and

tuberal nuclei of hypothalamus pass through periventricular

gray matter and reach the following:-

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