diencephalon

 Diencephalon 

Deep part of brain connecting midbrain with cerebral hemisphere. It houses third ventricle and is composed of-

Thalamus 

Hypothalamus

Epithalamus; pineal gland

1. Thalamus

This consists of two mases of grey and white mater situated with cerebral hemisphere just below corpus callosum, one on each side third ventricle.

Main function of thalamus is relay motor and sensory signals to cerebral cortex. It also regulates sleep, alertness and wakefulness.

Learning and memory.

2. Hypothalamus

It lies directly under thalamus, hypothalamus include control of; autonomic control center

Thirst center

Water and electrolyte balance

Sleep wake pattern; waking cycle

Appetite

Respiration

Sexual behavior

Temperature regulation; body temperature

Emotional reaction

preoptic area; coordinate sleep and body temperature.

Hormone control; pituitary gland

Pleasure/ fear