Psychology 1000 Lecture Notes - Lecture 6: Positron Emission Tomography, Functional Magnetic Resonance Imaging, Ct Scan

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

*drug doesn"t affect neuron, most don"t stop action potentials. Prevents re-uptake (dopamine stays in the synapse and isn"t taken back by the presynaptic neuron) Too much venom will cause muscles to move faster. Nicotine --> agonist (increases action at post synaptic membrane) Caffeine -->antagonist (decreases action at post synaptic membrane) Blocks adenosine receptors sites (adenosine makes you feel tired) Influence of receptor sites (i. e. opening sodium or potassium channel) Hyperpolarizes postsynaptic membrane, opens potassium channel, ipsp a. Epsps and ipsps are additive across space and time a. Graded potentials (adding epsps and ipsps, which determines whether neuron produces action potential or not) i. Constant inhibition effectively raises threshold a. b. c. Constant ipsps raises threshold of the neuron, ex. A single neuron might synapse with many others. White matter - more myelinated neurons than grey matter (higher order thinking processes) However increased size of cells, myelination, and glial cells make brain heavier when you"re an adult.