DIANCEPHALON -

Less visible.

Occupies only 1% of brain's volume.

Its lumen is diocoel or III ventricle.

Roof is epithalamus.

On it pineal body is present.

Floor is hypothelamus. It has optic chiasma.

Here on it infundibulum, pituitary gland & corpus mammary are present.

Diocoel is attached to 4th ventricle by Iter or aqua duct of sylvius.

FUNCTIONS -

1.       Help to cerebrum to control voluntary actions.

2.       To control feeling of cold, hot & pain.

3.       Hunger centre.

4.       Thermoregulatory centre.

5.       To control sweatening, thrusting, sleeping & fatigueness.

6.       Emotions as love / hate/ revange.

7.       Water balance & blood pressure.

8.       To control sexual desire.