The presence of consciousness in the absence of the cerebral cortex

Area of Science:

• Neurology
• Neuroscience
• Developmental Disorders

Background:

• Hydranencephaly is a rare neurological condition characterized by absent or severely compromised cerebral hemispheres.
• Patients with hydranencephaly are often presumed to lack consciousness and are classified within the vegetative state criteria.

Purpose of the Study:

• To review behavioral evidence suggesting consciousness in patients with hydranencephaly.
• To argue against the routine misclassification of these patients as lacking consciousness.
• To explore the implications of misclassification in clinical and theoretical neuroscience.

Main Methods:

• Review of existing behavioral evidence in patients diagnosed with hydranencephaly.
• Analysis of diagnostic criteria for vegetative state.
• Discussion of the impact of consciousness assessment in neurological conditions.

Main Results:

• Several pieces of behavioral evidence indicate the presence of consciousness in patients with hydranencephaly.
• Current classifications may inaccurately assign a lack of consciousness to these individuals.
• Misclassification has significant consequences for patient care and understanding of consciousness.

Conclusions:

• The assumption of unconsciousness in hydranencephaly patients warrants re-evaluation based on behavioral indicators.
• Accurate assessment of consciousness is crucial for appropriate clinical management and ethical considerations.
• Further research is needed to refine diagnostic approaches and understand consciousness in severe brain malformations.