PSYC 101 Lecture Notes - Lecture 3: Positron Emission Tomography, Auditory Cortex, Cerebellum

• School: Towson University
• Department: Psychology
• Course: PSYC 101
• Professor: Alexa J.Doerr

Document Summary

Terminal buttons: end of axon, stores neurotransmitters when not in use. All or none law: neurons fire or not fire, there is no in between. Action potential: +40 mv travels down the neuron for it to fire. Resting state: -70mv positive ions rush in. Refractory period: cannot fire again (time when you swallow) Dopamine: brain only, movement, reward, attention (parkinzon"s. Acetylcholine: skeletal movement, heart, and memory all over (alzheimer"s) Efferent neurons: motor, away from brain (als if they die) Excitatory: increases the likelihood of firing next neuron. Inhibitory: decreases the likelihood of firing next neuron. Heritability: the amount by which differences among people are because of genes. Interaction: how genes affect your environment (attractiveness and respect) Huntington"s disease: after age 40 muscle impairment ( basal ganglia deteriorates) Cat scan: uses x rays at angles to look at structures. Mri: powerful magnets, better look at detailed structures. Pet scan: uses radioactive substances to monitor brain activity.