Hi well comet to hcm.
In child hood what was the reason for convulsion,was it febrile convulsion or epileptic
feets is quite important to kow.At present convulsion may be in relation to child hood
convulsion,or may not be.Any way detail assesment with the help of EEG,CT brain,Lab
reports and at times CSF examintion may be needed to diagnose any convulsion.How
ever in your brothers case more likely to be epileptic convulsion
as already he had in
child hood.Better consult neurophysician he would explain you the course of disease.