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December 2, 2008
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Brain Tumor

Glioma Brain Tumor: Senator Ted Kennedy, What Does It Mean?

Medical Author: Benjamin C Wedro, MD, FAAEM
Medical Editor: Melissa Stoppler, M.D.

Seizures Affect the BrainWhen one of our political leaders becomes ill, it makes headline news. Senator Ted Kennedy suffered a seizure on Saturday, May 17, 2008 which led to a quick visit to Cape Cod Hospital and a medical helicopter flight to Massachusetts General Hospital, home base for Harvard Medical School. On May 20, 2008 doctors announced that a tumor had been identified as the cause of the seizure. Tissue samples taken at biopsy revealed that Senator Kennedy has a malignant glioma of the parietal lobe of his brain.

Seizures occur when the brain becomes irritable and abnormal electrical firings cause alterations in normal brain function. Usually, the patient becomes temporarily unresponsive and the exact location of the electrical short circuits will determine what abnormal physical findings are witnessed. If they involve the part of the brain that deals with movement, there may be rhythmic shaking or jerking. The seizure may involve just a mild absence or staring spell. It may be preceded by an aura in which the patient knows that a seizure is about to occur. There may be a post-ictal or recovery phase, in which the patient slowly returns to normal function as the brain resets itself. There are many different variants of seizures, and eventually a neurologist will get involved with the diagnosis and treatment.

Seizures are pretty common. The chance of having a seizure in your lifetime is almost 10%.

What is the brain?

The brain is a soft, spongy mass of tissue. It is protected by the bones of the skull and three thin membranes called meninges. Watery fluid called cerebrospinal fluid cushions the brain. This fluid flows through spaces between the meninges and through spaces within the brain called ventricles.

A network of nerves carries messages back and forth between the brain and the rest of the body. Some nerves go directly from the brain to the eyes, ears, and other parts of the head. Other nerves run through the spinal cord to connect the brain with the other parts of the body. Within the brain and spinal cord, glial cells surround nerve cells and hold them in place.

The brain directs the things we choose to do (like walking and talking) and the things our body does without thinking (like breathing). The brain is also in charge of our senses (sight, hearing, touch, taste, and smell), memory, emotions, and personality.

The three major parts of the brain control different activities:

  • Cerebrum - The cerebrum is the largest part of the brain. It is at the top of the brain. It uses information from our senses to tell us what is going on around us and tells our body how to respond. It controls reading, thinking, learning, speech, and emotions.

The cerebrum is divided into the left and right cerebral hemispheres, which control separate activities. The right hemisphere controls the muscles on the left side of the body. The left hemisphere controls the muscles on the right side of the body.

  • Cerebellum - The cerebellum is under the cerebrum at the back of the brain. The cerebellum controls balance and complex actions like walking and talking.

  • Brain Stem - The brain stem connects the brain with the spinal cord. It controls hunger and thirst. It also controls breathing, body temperature, blood pressure, and other basic body functions.

Picture of the Brain and Nearby Structures
The brain and nearby structures

Picture of the Major Parts of the Brain
Major parts of the brain



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