Question

briefly mention about diencephalon

Answer 1

It is present in the head region
It controls emotions
Site for reflex actions of some activities

Answer 2

The diencephalon is a division of the forebrain (embryonic prosencephalon), and is situated between the telencephalon and the midbrain (embryonic mesencephalon). It consists of structures that are on either side of the third ventricle, including the thalamus, the hypothalamus, the epithalamus and the subthalamus.

The diencephalon is one of the main vesicles of the brain formed during embryo-genesis. During the third week of development a neural tube is created from the ectoderm, one of the three primary germ layers. The tube forms three main vesicles during the third week of development: the prosencephalon, the mesencephalon and the rhombencephalon. The prosencephlon gradually divides into the telencephalon and the diencephalon.

Function :

The diencephalon is the region of the embryonic vertebrate neural tube that gives rise to anterior forebrain structures including the thalamus, hypothalamus, posterior portion of the pituitary gland, and pineal gland. The diencephalon encloses a cavity called third ventricle. Thalamus serves as a relay centre for sensory and motor impulses from Spinal cord and medulla oblongata to cerebrum. It recognises sensory impulses of heat, cold, pain, pressure etc. The floor of the third ventricle is called hypothalamus. It possesses control centres for control of eye movement and hearing responses.

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