01:830:310 Lecture Notes - Lecture 11: Slow-Wave Sleep, Evoked Potential, Lecture Recording
30 Jul 2016
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Document Summary
Membrane potential - voltage difference between the interior and exterior environment of a cell. Negatively charged and positively charged elemental ions (e. g. chloride, sodium, potassium, calcium) provide the concentration gradients responsible for voltage difference across the cell membrane. An electrode is inserted into the brain, adjacent to a neuron, the neurons activity is recorded. Most commonly done with animals (non-human primates - cats, rodents) Many individual neurons can be recorded simultaneously. Can record a single action potential or many action potentials. Discovered by hans berger in the 1930s. Eeg records electrical potentials or brain waves in the brain. Reflects the collective (and synchronous) activity of neurons in the cortex. Electrodes are attached to the skull corresponding to specific areas of the brain. Brief change in a slow-wave eeg signal in response to a discrete sensory stimulus is classified as an erp. Often referred to as evoked potentials (e. g. auditory evoked potential)
