Ongoing IS (and hypsarrhythmia) have the potential to adversely impact all aspects of brain development.
[childneurologyfoundation.org]
Results: All six affected boys had myoclonic seizures and TCS; two had infantile spasms, but only one had hypsarrhythmia.
[neurology.org]
Infantile spasm, IS, X-linked infantile spasm syndrome, X-linked infantile spasms, West's syndrome, Tonic spasms with clustering, arrest of psychomotor development and hypsarrhythmia
[rarediseases.info.nih.gov]