The pathways emanating from the Reticular Activating System activate the cortex by increasing the

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The Reticular Activating System plays a crucial role in regulating the brain's arousal and wakefulness level. It does so by filtering incoming sensory information and selectively activating the cortex through its pathways. The activation of the cortex results in an increase in the signal-to-noise ratio, which allows for more efficient processing of sensory information. This, in turn, leads to a state of wakefulness and alertness. None of the other options mention this activation of the cortex by the Reticular Activating System.

The Pathways Emanating from the Reticular Activating System Activate the Cortex