Nervous System


The NERVOUS SYSTEM is a complex, highly specialised network. It organizes, explains, and directs interactions between you and the world around you. The nervous system controls sight, hearing, taste, smell, and sensation).Voluntary and involuntary functions such as movement, balance, and coordination The nervous system also regulates the actions of most other body systems, such as blood flow and blood pressure. The ability to think and reason The nervous system allows you to be conscious and have thoughts, memories, and language. The nervous system is divided into the brain and spinal cord (the “central nervous system, or CNS) and the nerve cells that control voluntary and involuntary movements (the “peripheral nervous system, or PNS). The symptoms of a nervous system problem depend on which area of the nervous system is involved and what is causing the problem. Nervous system problems may occur slowly and cause a gradual loss of function (degenerative). Or they may occur suddenly and cause life-threatening problems (acute). Symptoms may be mild or severe. Weak memory: many people experience memory lapses. Some memory problems are serious, and others are not. Lack of concentration may also be a reason for poor memory. People whose memories are very poor and who have noticeable changes in personality and behaviour may be suffering from a form of brain disease called dementia. It seriously affects a person’s ability to carry out daily activities. Common Causes of Weak Memory are Aging, Lack of Concentration, Depression, Anxiety, Alcoholism, Drug Abuse, Brain Tumors, Certain Medications, Seizures, etc.

Migraine headache: A migraine is a severe, painful headache that is often preceded or accompanied by sensory warning signs such as flashes of light, blind spots, tingling in the arms and legs, nausea, vomiting, and increased sensitivity to light and sound. The excruciating pain that migraines bring can last for hours or even days. Migraine headaches result from a combination of blood vessel enlargement and the release of chemicals from nerve fibres that coil around these blood vessels. During the headache, an artery enlarges that is located on the outside of the skull just under the skin of the temple (temporal artery). This causes a release of chemicals that cause inflammation, pain, and further enlargement of the artery. A migraine headache causes the sympathetic nervous system to respond with feelings of nausea, diarrhea, and vomiting. This response also delays the emptying of the stomach into the small intestine (affecting food absorption), decreases blood circulation (leading to cold hands and feet), and increases sensitivity to light and sound.

Epilepsy (also spelled fitts or mal) is a brain disorder that causes people to have recurring seizures. The seizures happen when clusters of nerve cells, or neurons, in the brain send out the wrong signals. People may have strange sensations and emotions or behave strangely. They may have violent muscle spasms or lose consciousness. Epilepsy has many possible causes, including illness, brain injury, and abnormal brain development. In many cases, the cause is unknown.

Alzheimer’s disease/senile dementia:
dementia is a loss of brain function that occurs with certain diseases. Alzheimer’s disease (AD) is one form of dementia that gradually gets worse over time. It affects memory, thinking, and behaviour. You are more likely to get Alzheimer’s disease (AD) if you have a close blood relative, such as a brother, sister, or parent with AD, or if you have certain genes linked to AD, such as the APOE epsilon4 allele. The following may also increase your risk, although this is not well proven: being female, Having had high blood pressure for a long time, History of head trauma, Dementia symptoms include difficulty with many areas of mental function, including: emotional behaviour or personality; language; memory; perception; thinking; and judgement (cognitive skills). Dementia usually first appears as forgetfulness.

Hyperhydriosis. Hyperhidrosis is a medical condition in which a person sweats excessively and unpredictably. Those with hyperhidrosis appear to have overactive sweat glands. The uncontrollable sweating can lead to significant discomfort, both physical and emotional. The sweating may be all over the body, or it may be in one area. Conditions that cause second- degree hyperhidrosis include: acromegaly, anxiety conditions, cancer, carcinoid syndrome, certain medications and substances of abuse, glucose control disorders, heart disease, hyperthyroidism, lung disease, menopause, Parkinson’s disease, pheochromocytoma, spinal cord injury, stroke, tuberculosis, or other infections. Parkinson’s disease is a disorder of the brain that leads to shaking (tremors) and difficulty with walking, movement, and coordination. Parkinson’s disease most often develops after age 50. It is one of the most common nervous system disorders in the elderly. Sometimes Parkinson’s disease occurs in younger adults. It affects both men and women. In some cases,

Parkinson’s disease runs in families. When a young person is affected, it is usually because of a form of the disease that runs in families. Nerve cells use a brain chemical called dopamine to help control muscle movement. Parkinson’s disease occurs when the nerve cells in the brain that make dopamine are slowly destroyed. Without dopamine, the nerve cells in that part of the brain cannot properly send messages. This leads to the loss of muscle function. The damage gets worse with time. Exactly why these brain cells waste away is unknown.