Which of the following physiological mechanisms is thought to control overall cortical arousal?

Question

Quizplus · Accepted Answer

The ascending reticular activating system (ARAS) is responsible for controlling overall cortical arousal. It is a network of neurons that runs up from the spinal cord through the brainstem to the thalamus and hypothalamus, where it communicates with other brain regions to modulate wakefulness and alertness. The ARAS is regulated by various neurotransmitters, such as acetylcholine, noradrenaline, and serotonin, which can increase or decrease its activity and affect our level of consciousness. The parasympathetic nervous system, BIS, and BAS are all involved in regulating emotional responses and behaviour, but not directly involved in cortical arousal.

Which of the Following Physiological Mechanisms Is Thought to Control