The Central Nervous System

The Central Nervous System

Our nervous system is divided into 2 parts; the central nervous system and the Peripheral nervous system.

In this article we will focus on the central nervous system

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What are the components of the central nervous system?

Components of the central nervous system :

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The central nervous system is made up of two parts; the brain and the spinal cord, but how about the brain parts ?

I – ForeBrain / Prosencephalon :

 The forebrain is the largest region of the brain and it is structured in 2 parts :

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  • Telencephalon that contains the cerebral hemispheres (right and left) which are connected by a structure called corpus callosum (right picture) which contains 200 million white fibers.
  • Each hemisphere contains 4 lobes ; Frontal, Temporal, Parietal and Occipital lobes.
  • Diencephalon which contains the thalamus, hypothalamus, epithalamus, and subthalamus.

II – The Midbrain / Mesencephalon :

The midbrain is a portion of the brainstem, positioned above the pons, at the very top of the brainstem, directly underneath the cerebellum.

The midbrain is associated with many functions and systems of the nervous system, some of those functions being the management of visual and auditory sensory information.

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III – Hindbrain / Rhombencephalon

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Located at the lower back part of the brain. It includes most of the brainstem and a dense coral-shaped structure called the cerebellum.The brainstem is one of the most important parts of the entire central nervous system, because it connects the brain to the spinal cord and coordinates many vital functions, such as breathing and heartbeat.

The hindbrain is composed by :

  • Metencephalon (Cerebellum and Pons)
  • Myelencephalon (Medulla)

There is no scientific study more vital to man than the study of his own brain. Our entire view of the universe depends on it. Francis Crick

Walid SOULA

Sources :

  • Picture of central nervous system http://www.cancerhelpfranciscanlafayette.org/Cancer_Types/child_cns_germ_cell_277406E2_01.html
  • The Corpus Callosum picture https://www.facebook.com/DailyAnatomy/photos/a.165931116911609/946160908888622/
  • The Midbrain picture : https://brainmadesimple.com/midbrain/
  • Hindbrain : https://qbi.uq.edu.au/brain/brain-anatomy/hindbrain

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