White matter of the cerebral hemisphere

Contains Info about association and commissural fibers, internal capsule (draw scheme of tracts in internal capsule)

White matter, composed of myelinated fibers, serves as a crucial component within the brain's architecture. Let's delve into its intricate structures:

1. Centrum Semiovale:

• Present in each hemisphere

2. Corpus Callosum:

• This vital structure connects both centrum semiovale regions, facilitating communication between the brain hemispheres.

There are 3 types of white matter fibers:

a) Association Fibers

b) Commisural fibers

c) Projecting Fibers

Association Fibers

- These fibers link cortical areas within the same hemisphere, fostering communication between adjacent gyri. - Short Association Fibers: Connecting nearby gyri.

- Long Association Fibers:

Association Fibers

1. Uncinate Fasciculus: Links the inferior frontal lobe, crucial for motor speech, to the temporal lobe.
2. Cingulum: Characterized by long curves, it connects the frontal and parietal lobes with parahippocampal and adjacent temporal cortical regions.
3. Superior Longitudinal Fasciculus: - Among the largest, it connects the frontal lobe to the occipital and temporal lobes.
4. Inferior Longitudinal Fasciculus: situated deep within the cerebral hemisphere's lateral border. Facilitates communication from the occipital lobe to the temporal lobe, subsequently connecting to the fronto-occipital fasciculus.
5. Fronto-Occipital Fasciculus: Extending from the frontal to the occipital lobes.
6. Perpendicular fasciculus: A bundle of association fibers running vertically and interconnecting regions of the temporal, occipital, and parietal lobes.

Understanding these structures provides insights into the brain's intricate connectivity, essential for various cognitive functions.