Brain
The brain is an organ in the cranium. It is the principal organ of the nervous system. Unlike most other organs, topology has a very major role in function.
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Structure
Gross Anatomy
Another way of dividing it is into the brainstem, cerebrum and cerebellum.
- The hindbrain continues into the spinal cord, which leaves the cranium through the foramen magnum.
- Overlying the nervous tissue of the brain, there are three protective coverings - the meninges.
- In addition, the brain also has its own blood supply. Movement between the blood and the brain is regulated by the blood-brain barrier.
- The brain is surrounded by cerebrospinal fluid (C.S.F). This serves the main purpose of cushioning the brain against physical shocks.
Microscopic Anatomy
The brain itself is composed of:
Physiology
The subject of brain physiology is covered by neurophysiology. In addition, the biochemistry of neurotransmitters is dealt with by neurochemistry.