At the end of the article, you will able to describe cerebellum function, anatomy, facts.
In proportion to the size of the body, the human brain is the largest of all animals. The brain is a very delicate organ well protected inside the brain box (cranium) of the skull. The adult brain weighs about 1.35 kg and constitutes about 2% of the total body weight. It is 80% water and consumes more than 25% (one-fourth) of the total oxygen taken into the body.
The brain has three main parts visible externally,
- Cerebellum and
- Medulla Oblongata.
The brain is protected by 3 membranous coverings called meninges (meninx: membrane) which continue backward on the spinal cord.
- Dura mater – the outermost tough fibrous membrane (dura: tough, mater: mother)
- Arachnoid – the thin delicate middle layer giving a web-like cushion (Arachne: spider).
- Pia mater – the innermost highly vascular membrane, richly supplied with blood (pia: tender).
(Meningitis is the inflammation of the meninges).
The space between the covering membranes is & filled with a watery fluid – cerebrospinal fluid which acts as a cushion to protect the brain from shocks). The same fluid also fills the central spaces (ventricles) of the brain and the central canal of the spinal cord.
The cerebellum is a much smaller area of the brain located just at the base and under the large cerebrum. It has no convolutions but has numerous furrows. This also has an outer cortex made of gray matter. Centrally, it has white matter which, in a median section, appears like a branching tree (diagram above).
What if Cerebellum Damage?
The movement still possible. However, it will be going to cause the disorders in fine motor control, posture and motor learning.
The main function of the cerebellum is to maintain ‘balance’ of the body and coordinate muscular activity. The impulse for performing a muscular act originates in the cerebrum and not in the cerebellum.
For example, if you stand up and walk, the impulse for this activity arises in the cerebrum (conscious part). The act of walking involves coordinated working of many muscles. Proper coordination and timing of their contraction and relaxation is the responsibility of the cerebellum.
An alcoholic person when drunk generally walks clumsily. The cerebellum, due to the effect of alcohol, is unable to coordinate muscular movements properly.
- The cerebellum Latin for the little brain.
- It’s involved in coordination of movement (in other words motor control).
- It receives sensory input from the body and then it coordinates the motor output.
- Cerebellum involved in posture precision and accurate timing.
This is all about the Basics of Cerebellum Function, Anatomy, Facts.