The brain is one of the most largest and important component of our body and the entire nervous system. Without it, dendrites and axons wouldn't be able to perform their tasks due to lack of commandments. Because the brain is responsible for telling our nerves to avoid danger. Our brain is mainly composed of cerebrum, cerebellum, and the brain stem. Cerebrum has a surface broken by ridges and grooves and is divided into longitudinal (right hemisphere) and fissure (left hemisphere). It is also divided into four sections : frontal(posterior), parietal(posterior), occipital(posterior), and temporal(inferior). Inside the temporal is the insula which is known for its coordinate autonomic function. Cerebellum is posterior to the brain. Its function is to monitor out sensory, motor coordination, and balance. It is also known as the "little brain". Brain stem is inferior covered by the cerebrum receiving sensory information. It has three sections : medulla oblongata, pons, and midbrain.
Inside the brain, we can find diencephalon. It is mainly divided into four parts : thalamus (for information to the cerebrum), hypothalamus (hormone level, temperature, water-balance, thirst, appetite, and emotion regulation), pineal body (for secretion of melatonin), and pituitary gland(for secretion of other hormones).
Here are the following common disorders of the nervous system :
*Myasthenia gravis - disorder in which the immune system attacks & destroys receptors at the neuromuscular junction.
*Guillain-Barre Syndrome - form of peripheral neuropathy caused by inflammation of pheripheral nerves
*Botulism - form of paralysis caused by toxins produced by the bacterium Clostridium botilinum.
*Meningitis - the disease of the meninges which is responsible for protecting the nerves.
a. Viral - milder disease caused by viruses entering the mouth and travel to the meninges
b. Bacterial - fatal infection causing bacteria to enter the upper respiratory system to the meninges
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