PSY-B - Psychology PSY-B 320 Chapter Notes - Chapter 5.2,5.4: Central Nervous System, Autonomic Nervous System, Serotonergic
9 Feb 2017
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Four activating systems in the central nervous system: activating system. Neural pathways that coordinate brain activity through a single neurotransmitter. Cell bodies are located in a nucleus in the brainstem and their axons are distributed through a wide region of the brain. Four systems: cholinergic, dopaminergic, noradrenergic, and serotonergic. Systems in the central nervous system: cholinergic system (ach) Involved in normal waking behavior and is thought to function in attention and memory. Plays a role in learning by stimulating neurons to change their structure. Plays a role in wakefulness and learning. Imbalances associated with depression, schizophrenia, obsessive-compulsive disorder, sleep apnea. Neurotransmission in the somatic nervous system: cholinergic neuron. Neuron that uses acetylcholine (ach) as its main neurotransmitter. Excites skeletal muscles to cause contractions: nicotinic ach receptor. When ach (or nicotine) binds to this receptor, its pore opens to permit ion flow, thus depolarizing the muscle fiber.
