5. Kluver–Bucy Syndrome
At age 19, “Kevin” (probably not his real name) was a law-abiding citizen who began to experience “attacks” of deja vu as often as 20 times a day. Other symptoms included sharp chest pains, breathlessness, and even musical hallucinations.
All of this was diagnosed to be a result of epilepsy, which was found to be caused by the right mesial temporal lobe in his brain. At age 39, Kevin underwent surgery to remove the part of his brain that was causing the issues.
About a month after the surgery, he experienced serious behavioral changes. He developed an insatiable appetite for food and sex and eventually began downloading and viewing child porn.
Kevin was diagnosed with Kluver–Bucy syndrome. After his arrest, the defense argued that he was not in control of his actions due to his condition. As a result, he was given a reduced sentence.
4. Guillain–Barre Syndrome
When you have Guillain–Barre syndrome, your immune system attacks your peripheral nervous system, which carries information between your central nervous system (your spinal cord and brain) and the rest of your body. Guillain–Barre leads to weakness, numbness, and tingling throughout your body. Eventually, this can lead to paralysis.
Although the cause is unknown, this disorder is believed to be triggered by a stomach flu or lung infection. Luckily, it only affects about 1 in 100,000 people, so there’s no need to worry too much.