01:830:340 Lecture Notes - Lecture 2: Central Nervous System, Autonomic Nervous System, Axon Terminal
14 Jul 2016
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Document Summary
Overactive autonomic nervous system can lead to some anxiety disorders. Underactive ans can lead to conduct disordered behavior. Selective serotonin reuptake inhibitor (ssri)- blocks reabsorption of serotonin allowing it to remain in the synaptic cleft for receptors. Serotonin (5ht): tryptophan is the precursor to serotonin and is found in food; reason why anorexic people may be depressed. Norepinephrine (ne)- released in stressful situations, prepares the body for action. Dopamine (da)- coordinates the systems: low amounts depression. Central nervous system (cns: brain, spinal column. Peripheral nervous systems (pns: autonomic- involuntary actions. Sympathetic ns activates during fight or flight response to real or perceived danger. Parasympathetic- rest and digest : somatic- voluntary actions. Medulla & pons- responsible for numerous autonomic actions: breathing, heart rate. Frontal lobe- ability to problem solve, impulse control center, moral reasoning, broca"s area- verbal responses. Motor strip- motor functions, ability to articulate. Sensory strip- senses hot/cold & different textures, maintains physical perception.
