Under normal brain functioning, activation of the reticular activating system (RAS) produces consciousness.

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The reticular activating system (RAS) plays a key role in regulating wakefulness, arousal, and attention, and it is thought to be essential for the maintenance of consciousness. Activation of the RAS can be influenced by various internal and external factors, such as sensory input, emotional states, and neurotransmitter release. Therefore, it is generally accepted that the activation of the RAS is necessary for the production of consciousness.

Under Normal Brain Functioning, Activation of the Reticular Activating System