Question

Write short notes on Hindbrain.

Answer 1

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$\huge{ \blue{ \bf{Hind \: Brain : }}}$
✔Hind Brain , also called Rhombencephalon, comprises cerebellum, pons Varolii and Medulla oblongata.

$\large {\red{\bf{Cerebellum : }}}$
✴ It's also called as The little brain.

✴It is the second largest part of the brain.

✴It consists of two cerebellar hemisphere and a central vermis.

✴Each cerebellar hemisphere consists of three lobes namely ANTERIOR , POSTERIOR and FLOCCULAR LOBES.

✴It has a branching tree -like white matter called ARBOR VITAE(Tree of LIFE) surrounded by a sheath of grey matter (cerebellar cortex).

$\boxed{ \bf{Note : }}$
Cerebellum is responsible for the control and coordination of locomotor movements. The cerebellum is called the gyroscope of the body because it maintains equilibrium. Damage to cerebellum often results in ataxia (uncoordinated voluntary muscle movements)


$\large{ \purple{ \bf{Pons \: Varolii : }}}$
✴ It lies in front of the cerebellum below the mid brain and above the medulla oblongata.

✴It consists of nerve fibres which form the bridge between the two cerebellar hemispheres.

✴ It's a relay station between cerebellum ,spinal cord and rest of the brain .

✴Pons has the pneumotaxic centre involved in the control of the respiratory muscles as it regulates the amount of air a person can take in(rate of breathing and depth of breathing).

$\large { \orange{ \bf{Medulla \: Oblongata : }}}$

✴ It is the posterior most part of the brain.

✴It extends from the pons Varolii above and continuous with the spinal cord below.

✴It has a very thin, vascular folded structure called POSTERIOR CHOROID PLEXUS.

✴ Medulla includes cardiovascular and respiratory centers, the centers for swallowing, vomiting, coughing, sneezing and hiccupping.

✴ The mid brain, pons and medulla Oblongata are together referred to as THE BRAIN STEM .

✴The medulla oblongata passes out of the cranium through the foramen magnum and joins the spinal cord.

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$\huge{ \boxed{ \boxed { \green{BeBrainly}}}}$