PSY-2012 Lecture Notes - Lecture 3: Theta Wave, Circadian Rhythm, Sleep Spindle
Document Summary
She is exhausted but knows that she has to stay up and study in order to pass. What drug should she take: cocaine, amphetamines, lsd, quaalude. Axon- receives information covered the myelin sheath. Myelin sheath- fatty tissue that insulation and speeds up information. Terminal branches- releases information to the next neuron. Once a message gets to the axon terminal, neurotransmitters are released into the receptor site. Neurotransmitters= chemical messengers that neurons use to communicate with one another. Neurons respond to neurotransmitters by generating electrical activity. When there is no neurotransmitters acting on a neurons, it is at the resting potential. When there is enough of a charge inside the neuron (threshold), and action potential will occur. Action potential- abrupt waves of electrical discharge triggered by a change in charge inside the axon. In between firings, there is a brief absolute refractory period. When neurotransmitters are released, they bind with receptor sites of the next neurons.
