PSYC 2200H Lecture Notes - Lecture 3: Parasympathetic Nervous System, Medial Lemniscus, Sympathetic Nervous System

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How thoughts can influence the physiology of the brain. Orbitofrontal area amygdala hypothalamus lateral medulla spinal cord. Orbitofrontal- hyperactive when responding to emotional stimuli. Spinal cord- allows you to interact and move your body. Pns autonomic nervous system sympathetic and parasympathetic. Somatic nervous system sensory (afferent) and motor (efferent) Autonomic nervous system (communicates with internal organs and glands) Motor neurons found in ventral portion of the spinal cord. Motor information comes from the ventral side (movement) Sensory information through the dorsal side (extracting and processing sensory information) For the spinal cord, the target is affected directly. Every part of the body can be sympathetically active or parasympathetically active. Sympathetic arousal- pupil dilation (ex. seeing something you like) In the evening, you become more parasympathetically dominant. Cold air activates the parasympathetic nervous system. Neurons exit from craniosacral region of the cns. Concerned with conservative vegetative function states (rest and repair) Neurotransmitter at postganglionic nerve endings is acetylcholine.

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