| Christopher was born with a rare form of epilepsy known as gelastic epilepsy which causes seizures combined with involuntary and fearful uncontrollable bouts of laughing. |
| Examples of neurological causes of PLC are pseudo-bulbar palsy, gelastic seizures, Alzheimer's disease, multi-infarct dementia, Parkinson's disease and Down syndrome. |
| From birth he has suffered from gelastic epilepsy in which seizures cause uncontrollable bouts of laughing. |
| Later, it turned out, that he was suffering from a rare form of epileptic episode called gelastic seizure, reports the New York Daily News. |
