here< /a> . < /p>
Following up on their previous research (Hamdan et al. , 2009) , Dr. Hamdan and his team sequenced samples from 50 new individuals with non-syndromic intellectual disability (NSID) . They identified one 21-year-old individual with a de novo< /em>  mutation (not found in either parent) in the STXBP1< /em>gene. Unlike their previous findings (where two individuals were reported to have non-specific epilepsy were found to have STXBP1 < /em>mutations) , the newly identified individual did not have a reported history of epilepsy. He was reported to have a diagnosis of severe intellectual disability (ID) , but had no history abnormal EEGs or brain imaging. The individual did not experience any muscle weakness (hypotonia) , but did have a history of tremors. This finding supports the idea that the STXBP1 < /em>gene may be linked to a wider range or spectrum of features than previously understood. < /p>
< /p>
< /p>