(i) Maintains connections between forebrain and hindbrain.
(ii) It combines visual and auditory information.
(iii) It generates reports.

The fluid-filled narrow tube in the midbrain is called cerebral aqueduct. It connects the 3rd and 4th ventricles.

Two cylindrical parts on the lateral side are called cerebral peduncle.

The two spherical parts on the surface are called corpora quadrigemina. It is divided transversely to form four segments.

The small and compact area between the hypothalamus and the cerebellum is called the midbrain or mesencephalon. The midbrain consists of two spherical parts on the dorsal side and two cylindrical parts on the dorsal side.

The small and compact area between the hypothalamus and the cerebellum is called the midbrain or mesencephalon. The midbrain consists of two spherical parts on the dorsal side and two cylindrical parts on the dorsal side. It consists of three parts. namely-
1. Corpora quadrigemina: The two spherical parts on the surface are called corpora quadrigemina. It is divided transversely to form four segments.
2. Cerebral peduncle: Two cylindrical parts on the lateral side are called cerebral peduncle.
3. Cerebral Aqueduct: The fluid-filled narrow tube in the midbrain is called cerebral aqueduct. It connects the 3rd and 4th ventricles.
Functions of the Mesencephalon
(i) Maintains connections between forebrain and hindbrain.
(ii) It combines visual and auditory information.
(iii) It generates reports.

(i) It acts as a center of the autonomic nervous system.
(ii) acts as the center of hunger, thirst, sweat, sleep, anger, suffering, hatred, love, anxiety etc.
(iii) It regulates body heat.
(iv) It secretes ADH.
(v) It secretes two types of neurohormones namely vasopressin and oxytocin.
(vi) It regulates tropic hormone secretion with the help of neurohormones.

A dozen separate regions below the thalamus are collectively called the hypothalamus. It is made up of gray matter. The hypothalamus is connected to the pituitary gland by a narrow part.

(i) It acts as a center for sensation of pressure, touch, pain etc.
(ii) It reveals human personality and social behavior.
(iii) It wakes up the sleeping person suddenly and alerts them to the environment.

Two oval-shaped regions located in the cerebral medulla are called thalamus. It is made up of gray matter. Each thalamus is accompanied by a pinna basal ganglia. The two thalamus are connected by a junction. The length of the thalamus is 4 cm. Each thalamus contains 1 oval ganglion.