my mother is 60.she has no apparant medical conditions.her ct scan and mri are clear. from last 3 months or so she have had 4 episodes where she uncontrollably went into sleep while talking. she complained that somethings not right,dificulty in moving her tongue during talking,then got asleep with bp and pulse normal. she remains asleep for 48 to 72 hours but do keep drinking milk and eating soft things oraly but with close eyes and with assistance. neuro doc gave her cipralex but its still kinda undiagnosed as she had an episode again. she feels weakness after waking up for around 12 hours then she is fully active again. can anyone help please?