The National Institute of Neurological Disorders and Stroke (NINDS) describes the presentation of this condition as follows: "A baby born with<unk>  is usually blind, deaf, unaware of its surroundings and unable to feel pain. Although some individuals with<unk>  may be born with a main brain stem, the lack of a functioning cerebrum permanently rules out the possibility of ever gaining awareness of their surroundings. Reflex actions such as breathing and responses to sound or touch may occur." Due to the presence of the brainstem, children with<unk>  have almost all the primitive reflexes of a newborn, responding to auditory, vestibular and painful stimuli. This means that the child can move, smile, suckle and breathe without the aid of devices.
Anencephaly
Exencephaly
Hydranencephaly
Hemihydranencephaly
Megalencephaly
Schizencephaly
Microhydranencephaly
Lissencephaly