PSYC 1100 Study Guide - Comprehensive Final Exam Guide - Working Memory, Sigmund Freud, Genetics
Document Summary
Interneurons can only found in spinal cord and peripheral nervous system. Sensory and motor neurons are linked by interneurons: proteins with negative charge are only found in intracellular fluid. Sodium ions have a negative charge in extracellular fluid. In its resting state, an axon has mostly negative inside and positive outside. When neuron fires, positively charged sodium ions flood in, this called depolarization causes the next axon channel to open and so on, called action potential. Refractory period when the neuron pumps the positively charged ions back outside. Older brain structures fmri scan: tracks successive images of brain tissue to show brain function: pet scan tracks radioactive glucose to reveal brain activity, ex. Looking at someone as a friend or stranger: mri uses magnetic waves and radio waves to shoe brain anatomy, eeg recording of electrical activity waves across brains surface, these waves are measured by electrodes placed on the scalp.
