وضعیت عصبی با بررسی معاینه و شناخت و رفتار در 4 سالگی بررسی شده است

At age 4, complex MND assessed with the Hempel assessment was not associated with cognition and behaviour, presumably due to a ceiling effect in the Hempel domain of fine motor function. A more optimal neurological condition was associated with higher IQ and better behaviour.