PSYC 101 Lecture Notes - Lecture 5: Botulinum Toxin, Tegmentum, Latrodectus
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PSYC 101 Full Course Notes
Verified Note
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Document Summary
Lecture 5-7: human nervous system + textbook chapter 3. Brain and spinal cord: integrative and control centres (spine is the brains extension into the. Cranial and spinal nerves: communication lines b/w cns and rest of (cns) body) l (pns) body division. Somatic and visceral nerve fibers: motor nerve fibers: receptors to cns cns to effectors (muscles/glands) Visceral motor (involuntary): somatic motor (voluntary): cns to cardiac/smooth musc + glands cns skeletal muscles. Conserves energy, promotes housekeeping func during rest mobilizes body sys during activity (fight/flight) Autonomic nervous system: sympathetic division: fight or flight: stress activates this and puts other non-necessary systems on hold; releases cortisol and catecholamines (epinephrine and norepinephrine, parasympathetic division: rest or digest; reactivates suppressed actions. Activating the sympathetic nervous system: cortisol: stress hormone, incr levels can lead to organ damage, catecholamines: epinephrine and norepinephrine (ep: dilates pupil, incr hr) Somatic division (efferent signals): control voluntary movement: from brain to body via spinal cord.
