Introverted individuals are in possession of a more easily stimulated reticular formation and so are less likely to seek out stimulation, while extroverts actively seek out stimulation because theirreticular formation is somewhat underactive. It could be hypothesised that addicted patients are in possession of an underactive reticular formation and so therefore crave stimulation.
Reticular Formation (RF): area of neurons running through middle of medulla and pons and slightly beyond. Play role of general arousal, alertness, sleep.
A Prayer Service for a Family Celebrating a Baptismal Anniversary (from Loyola Press)
Mudulla: Regulates unconscious functions such as breathing and circulation. Controls life-sustaining functions (heartbeat, breathing, swallowing, digestion, coughing, vomiting). Located at the top of the spinal column, base of the head/skull.
The reticular formation is a set of interconnected nuclei. This “web of gray matter” runs vertically throughout the brainstem and has connections with the cerebrum. This has over 100 neural networks that use different neurotransmitters that function in: Somatic motor control, Cardiovascular control, Pain modulation, Sleep and consciousness, and Habituation. The two components of this formation are the ascending and descending reticular formation.