Reticular activating system
From Psy3241
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Reticular Activating System
The Reticular Activating System (RAS) is located near the medulla oblongata and the midbrain at the core of the brain. The RAS is believed to be fundamental for human and animal consciousness as well as arousal and motivation. The RAS also is believed to be vital in controlling circadian rhythms and other covert body functions such as respiration.
Damage
The Reticular Activating System is one of the most resilient areas of the brain, and will be supplied oxygen and blood longer than other areas of the brain. Damage to the RAS can lead to Coma due to its function in controlling respiration and arousal. Damage can be caused by direct lesion or by oxygen deficiency as well as drug use.
Effect of Drugs
Drugs that are believed to directly effect the function of the RAS are called Psychoactive Drugs, which also directly effect the central nervous system. Stimulants such as cocaine, caffeine, and Adderall all increase the activity of the RAS and CNS. Analgesics which are more commonly known as pain killers, generally slow down the activity of the RAS and increase the activation of dopamine receptors in the RAS.
ADHD
New research suggests the RAS plays an important role in Attention deficit disorder and Hyperactive attention deficit disorder. Studies suggest that children with an overly active RAS likely is managing ADD or ADHD
