RAS SYSTEM

• Where is the Reticular Activating System (RAS) located?

  In the brain stem
• What is the main function of the RAS?

  To regulate sleep/wake transitions
• How does the RAS contribute to selective attention processes?

  It is involved in our selective attention processes
• What role does the RAS play in filtering sensory stimuli?

  It dampens the effect of repeated stimuli to prevent sensory overload
• How does the RAS affect introverts and extroverts differently?

  Introverts have high levels of arousal due to a weak RAS filter, while extroverts have low levels of arousal as the RAS reduces sensory stimuli effects
• What types of sensory input does the Reticular Activating System process?

  • Special sensory input
  • General cranial or spinal nerve input
• What is the reticular formation?

  • A network of neurons located in the brain stem
  • Involved in regulating wakefulness and sleep