HypothalamusHypothalamus

position

Floor of third ventricle(Tuber cinerum andMamillary bodies)

M M

TC

Tuber cinerum:infundibulumMedian EminenceLat. EminencePostinfundibular Eminenece

Hypothalamus zones

By fornix and mamillothalamic tract

1- medial zone 2- lateral zone

Medial zone

1- suprachiasmatic region 2- tuber cinerum region 3- mamillary region

Lateral zone

1- Lateral nucleus 2-Lateral tuberal nuclei

Lateral zone

Functions of hypothalamic nuclei

1-contol of endocrine glands via pituitary gland

Two ways of control

1- Tuberoinfundibular tract (related to ant lobe or adenohypophys)

2- Hypothalamohypophyseal tract( related to post lobe or neurohypophys)

Functions of hypothalamic nuclei

1-contol of body tempreture

Ant. nucleus

post. nucleus

Functions of hypothalamic nuclei

1-contol of behavior

Functions of hypothalamic nuclei

1- water balance Lateral nucleus

Functions of hypothalamic nuclei

1- circadian cycle Suprachiasmatic nucleus

Functions of hypothalamic nuclei

1-Control of autonomic system Postro-lateral (sympathetic response) Antro-medial (parasympathetic response)