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I found this article on www.epilepsy.com
“CRAZY? THINK AGAIN…” WHEN SEIZURES LOOK LIKE PSYCHIATRIC DISEASE
Many people in the community have seen or heard of a "grand mal" seizure, otherwise known a generalized tonic-clonic seizure. These are the types of seizures that are obvious and usually portrayed in films and on television. People who have epilepsy, as well as their friends and family members, understand that not all seizures are as dramatic as grand mal seizures or the ones portrayed in the media. Many seizures are much more minor things, such as staring spells or lip smacking. These slight physical changes may be the only outward manifestation of the seizure. Even less commonly recognized and diagnosed as seizures are some rare types of seizures where patients may have only psychological or psychiatric symptoms, at least at first.
One type of epilepsy – frontal lobe epilepsy – is notorious for causing strange behaviors that frequently go misdiagnosed as psychiatric disease. Patients can have unexplained behaviors that cannot be explained by a prior psychiatric history or family history of psychiatric problems. They may even be diagnosed with pseudoseizures, or psychiatric non-epileptic attacks, because the behavior caused by the seizure is not typical seizure behavior. For example: one of our patients was sent for evaluation because she began to have episodes of inappropriate behavior at work: giggling, dancing, and speaking gibberish. Another patient sent to us had been having the obsessive-compulsive behavior of checking their blood glucose. Yet another who has chronic headaches began to have episodes of crying out in agonizing pain. Upon monitoring in our epilepsy monitoring unit, we found that all of them had seizures which were causing the abnormal behavior.
An additional type of rare seizure becomes more prevalent in the summertime (or year-round in the subtropics of Florida), when mosquitoes abound. It is not an uncommon occurrence for some of our patients to be eventually diagnosed with a viral infection of the brain, called encephalitis. Many of the patients we have seen have personality changes or memory problems for two to three weeks, but have not seen a Neurologist because it is not initially clear that the brain has a problem. They may not even have symptoms of a viral illness (flu-like symptoms such as a headache, fever, or body aches). When they are eventually evaluated for their memory problems or personality changes, they would have brain imaging (MRI) and brain wave testing (EEG); these are usually abnormal with encephalitis. The MRI may confirm that they have abnormalities in the temporal lobe of the brain, which can affect memory. EEG may show what is known as "subclinical seizures" (seizures that are not obvious but that can cause personality changes and memory problems). When a spinal tap is done, it can reveal laboratory findings of encephalitis. Sometimes, we are able to find the virus responsible (for example, West Nile Virus) – but many times, at the end of the day, we are unable to identify the virus responsible.
The lesson is that there is a sudden onset of personality changes, or changes over two to three weeks in a person who does not have a history of abnormal behavior or psychiatric illness, and especially in a patient with no family history of psychiatric illness, the cause of the personality change should be further investigated by a Neurologist. The workup for this would generally be an MRI and an EEG to identify seizures that are not the typical types of seizures, and sometimes a spinal tap to attempt to identify any signs of an infectious cause (encephalitis).