welcome to health care magic!
Your question is vague.
To predict the possibility of your kids getting affected ,first we need to know the exact diagnosis of the congenital neurological disorder
affecting your sibs,
.Each disorder behaves in a different way - some are called autosomal recessive,some are dominant.
Some have mitochondrial
inheritance which is passe through mothers.
Some are random multifactorialinhertance.
So knowing the diagnosis in affected persons will help in predicting the possibilities of recurrence.
Hope and pray that your baby is normal!