Describe the structure and function of midbrain.

1.	Describe the structure and function of midbrain.
Answer» 1. Structure of midbrain: Midbrain is the middle part of the brain situated between the forebrain and the hindbrain. It is present between the pons varolii and diencephalon. It has two distinct regions : Corpora quadrigemina and crura cerebri. Corpora quadrigemina consists of two pairs of lobes, viz., superior colliculi and inferior colliculi. These are located in the thick wall of midbrain. Crura cerebri are thick bands of longitudinal nerve fibres, present on the floor of midbrain. 2. Functions of midbrain: Inferior colliculi control and coordinate auditory reflexes. Superior colliculi control head and eye movements. Crura cerebri connect the cerebrum to cerebellum and spinal cord.

Answer»

1. Structure of midbrain:

Midbrain is the middle part of the brain situated between the forebrain and the hindbrain. It is present between the pons varolii and diencephalon.
It has two distinct regions : Corpora quadrigemina and crura cerebri.
Corpora quadrigemina consists of two pairs of lobes, viz., superior colliculi and inferior colliculi. These are located in the thick wall of midbrain.
Crura cerebri are thick bands of longitudinal nerve fibres, present on the floor of midbrain.

2. Functions of midbrain:

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