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The brain is the control center of all activities performed by your body. The functional ability of the brain is mind-boggling; it takes in input and sends out instructions for numerous body functions with precision and in less than a second.

To perform so many non-stop activities, the brain requires a continuous supply of blood. Any interference in this supply may lead to a condition called stroke, when the area of the brain devoid of blood supply stops working.

Strokes and the Brain

A stroke happens when blood supply to the brain is disrupted by either a ruptured blood vessel or a clot formation that blocks blood from getting to a portion of the brain. When the supply of oxygen and nutrients is disrupted, brain cells can become damaged and quickly die. Because these brain cells, called neurons, cannot regenerate, strokes can cause damage beyond repair. That’s why stroke is considered a medical emergency and needs immediate medical attention.

There are three categories of stroke:

  • Ischemic stroke: this is the most common stroke is, it is caused when a blood clot blocks a blood vessel and prevents blood from reaching the brain.
  • Hemorrhagic stroke: caused by a leaking or ruptured blood vessel that bleeds into the brain.
  • Transient ischemic attack (TIA): a temporary interruption of the blood supply to the brain, it is sometimes called a mini-stroke.


Effects of a Stroke

Strokes exhibit different physical effects depending on the part of the brain that is affected. The four parts of the brain include the right hemisphere, the left hemisphere, the cerebellum at the back of the brain, and the brain stem connecting the brain to the spinal cord.

If you have a stroke, you could have a sudden numbness or weakness on one side of the body involving the face, arm, or leg. You might feel sudden confusion and have difficulty speaking or understanding speech. Your eyesight could suddenly become poor. You could feel dizzy or not be able to walk properly. You might be unable to control your actions. Some people might also have a sudden, severe headache with no known cause. If you experience these symptoms, call an ambulance immediately. The time factor is very important in preventing damage to the brain.

Repercussions of a stroke depend on the amount of damage to the brain. They can vary from paralysis to severe mood swings to a change in perception to problems with speech, eating, or thinking. With rehabilitation many of these effects can improve over time and may even disappear completely.

 

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