PSYCH 454 Study Guide - Midterm Guide: Binary Code

• School: UW-Madison
• Department: Psychology
• Course: PSYCH 454
• Professor: Yuri B.Saalmann

Document Summary

Ex: if you want to record single neuron, need high impedance in order to isolate spikes from individual neurons. ** large exposure area of contact= lower impedance= unable to record single ap ** Electrode tip: needs to be close to neuron to record spike. Closer to cell body electrode is= higher the amplitude of ap bring electrode near soma to maximize electron potential. Ex: typical ecog surface cortex, epilepsy monitoring) surface electrode = large; not able to isolate individual neurons. Understanding total population neuron activity eeg or fmri. Fmri = worst for temporal resolution (no meaningful time frame) Neural codes fall into two main categories: Spike rate code # of spikes in a given interval; not based on timing of spikes within an interval. Increasing stimulus activity, increase # of spikes. Pooled response code: # of spikes from multiple cells in given time. Reduces noise from variability of individual cells.