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Ascending reticular activating system. Reticular formation labeled near center. The ascending reticular activating system (ARAS), also known as the extrathalamic control modulatory system or simply the reticular activating system (RAS), is a set of connected nuclei in the brains of vertebrates that is responsible for regulating wakefulness and ...
It is a part of the reticular activating system. The locus coeruleus, which in Latin means "blue spot", is the principal site for brain synthesis of norepinephrine (noradrenaline). The locus coeruleus and the areas of the body affected by the norepinephrine it produces are described collectively as the locus coeruleus-noradrenergic system or LC ...
The reticular activating system is the part of the brain that controls wakefulness. It’s part of the brain stem, which controls automatic bodily functions like the heart, lungs, digestion, and ...
The reticular activating system controls arousal and awareness of the cerebral cortex. Damage here can result from many potential factors, such as: traumatic brain injuries, such as those caused ...
One such example is the heterogeneous collection of more than two dozen nuclei on each side of the upper brainstem (pons, midbrain and in the posterior hypothalamus), collectively referred to as the reticular activating system (RAS). Their axons project widely throughout the brain.
The swelling may eventually cause the brain to push down on the brain stem, which can damage the reticular activating system (RAS)—a part of the brain that's responsible for arousal and awareness.
The reticular formation is a netlike system that stretches across all three zones of the brainstem. The part within the medulla oblongata helps regulate blood pressure, heart rate, and respiration.
The pedunculopontine nucleus ( PPN) or pedunculopontine tegmental nucleus ( PPT or PPTg) is a collection of neurons located in the upper pons in the brainstem. [1] [2] It is involved in voluntary movements, [3] arousal, and provides sensory feedback to the cerebral cortex and one of the main components of the reticular activating system.