The presence of consciousness in the absence of the cerebral cortex.

Hydranencephaly is a rare neurological condition in which the cerebral hemispheres are either absent or severely compromised. It is widely believed that children with hydranencephaly are not conscious; and therefore, are routinely classified into the diagnostic criteria of vegetative state. However, there are several pieces of behavioral evidence clearly indicating the presence of consciousness in such patients. Here, I review these behavioral evidence and argue how misclassification of these patients and assigning them a lack of consciousness have far-reaching implications in terms of both clinical and theoretical neuroscience.