A lumbar puncture or a spinal tap is a neurological procedure that involves your lower back. The doctor inserts a needle in the middle of two lumbar bones (vertebrae) to extract a cerebrospinal fluid sample.
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A stroke generally occurs when there is an obstruction to the blood flowing to the brain. When this happens, the brain cells start to die. However, the symptoms can vary depending on the area that is deprived of the blood supply.