Damage to which of the following areas would result in unconsciousness or even coma?

Question

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The reticular activating system is responsible for maintaining consciousness and if it is damaged, it can result in unconsciousness or coma. The cerebellum is responsible for coordination and balance, the corpus callosum connects the two hemispheres of the brain, and the blood-brain barrier regulates the passage of substances between the brain and blood vessels, but damage to these areas alone would not necessarily result in unconsciousness or coma.

Damage to Which of the Following Areas Would Result in Unconsciousness