PSY100H1 Lecture Notes - Lecture 3: Conjoined Twins, Prefrontal Cortex, Motor Planning
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PSY100H1 Full Course Notes
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Behavior is determined by multiple factors 1: biological foundations. Single-cause explanations may be accurate, but they are generally always incomplete. Behavior is governed by a complex network of interacting factors (multifactorial causation): Culture: where you grow up, where you are now. Central nervous system (cns) (50 million nerve cells in the brain 99%) The basic unit of the nervous system. Communicate with other neurons through chemical signals. Dendrites: receive the electrochemical signals from other neurons. Terminal buttons (axon terminals): releases the neurotransmitters and passes it along through the synapse to the connecting neuron. Synapse: connects the neurons and releases the signal. Myelin sheath: waxy/fatty substances that surrounds the axon, makes the signal move faster through the axon. Excitatory signals: increase the likelihood that the neuron will fire (less negative, more positive) Inhibitory signals: decrease the likelihood that the neuron will fire. They do this be affecting the polarization of the cell.
