The Brain, anatomy revision (brain stem and cerebellum)

The brain is dominated by the cerebral hemispheres.
Their highly convoluted outer mantle consists of grey matter; the inner core of white matter.
The hemispheres are separated by the great longitudinal fissure.

braindiagram

THE BRAIN STEM.

Consists of the medulla oblongata, pons and midbrain.
Acsending and descending nerve fibres ass through it linking the spinal cord to the brain.

Midbrain – most superior part of brain stem.

Pons – anterior projection of the brain stem, above medulla oblongata.

Medulla oblongata – meets the spinal cord, lowest part of the brain stem.

brainstem-300px

CEREBELLUM.

Posterior to the brain stem.
Attached to the brain stem by a large mass of nerve fibres, which is split in to 3 parts:
– Inferior
– Middle
– Superior

This mass carries nerve fibres between the medulla, pons, midbrain and cerebellum.

The outer layer (cerebral cortex) consists of grey matter.
Cortex surface is highly convoluted, forming a regular pattern of narrow parallel folds or folia.

The central core consists of white matter, nerve fibres running to and from the cortex.
Tree like arrangement.

Cerebellum is responsible for coordination of movement on an entirely unconscious level.

f15-22a_cerebellum_mids_c

Please note this will be updated in more detail once the relevant and reliable sources of information become available to me.

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