A sick intubated neonate is having bilateral jerk of both right and left upper limbs with some occasional twitching of neck as well. Likely type of seizures:-

Though most common type of neonatal seizure is subtle seizure, subtle seizures are very difficult to recognise, and might manifest as just some lip smacking movements, or cyclical movement of limbs. However, in the given scenario, the newborn has bilateral jerk of both right and left upper limbs with some occasional twitching of neck. This is suggestive of multifocal clonic seizures.