Flashcards in Chapter 4,5,6 Vocab Deck (294)
Regular, 8 to 12 second, high amplitude waves that are associated with relaxed wakefulness.
Event Related Potentials
Waves that accompany certain psychological events.
Sensory Evoked Potential
A type of the event related potentials, the change in the cortical EEG signal that is elicited by the momentary presentation of a sensory stimulation.
A method used to reduce the noise of the background EEG
Threshold of Excitation
The level of depolarization necessary to generate an action potential, usually about -65 mV
Average Evoked Potentials
Focuses on the various waves in the averaged signal. When presented a stimulus, the average response time. Plotted then the background EEG is canceled.
A massive momentary reversal of a neurons membrane potential from about -70 mV to about +50 mV
This wave occurs only if the stimulus has meaning for the subject. Ex: gets a reward
Responses that are not graded, that either occur in their full extent or not at all
The portion of the evoked potential when the stimulus is not influenced by the meaning of the stimulus for the subject.
Adding or combing a number of individual signals into one overall signal
Usual procedure for the measuring muscle tension.
The integration of signals that occur at different sites on the neurons membrane
Electrophysiological technique for recording eye movement
The integration of neural signals that occur at different times at the same synapse
Skin Conductance Level
One of the most common to assess the above. Measure of the background level of skin conductance that is associated with a particular situation
Voltage-Activated Ion Channels
Ion channels that open and close in response to changes in the level of the membrane potential
Skin Conductance Response
One of the electrodermal activity tests, is a measure of the transient changes in the skin conductance that are associated with discrete experiences.
During the rising phase of an action potential, the membrane potential changes from negative to positive, a depolarization
Recording of the heart beat by placing electrodes on the chest. Average is 70/min
Re-polarization refers to the change in membrane potential that returns the membrane potential to a negative value after the depolarization phase of an action potential has just previously changed the membrane potential to a positive value
A chronic blood pressure of more than 140/90 mmHg.
Absolute Refractory Period
A brief period after the initiation of an action potential during which it is impossible to elicit another action potential in the same neuron
Device composed of a hollow cuff, a rubber bulb for inflating, and a pressure gauge. Measures blood pressure.
Relative Refractory Period
A period after the absolute refractory period during which a higher-than-normal amount of stimulation is necessary to make a neuron f ire
Brain surgery using a stereotaxic apparatus to position an electrode or cannula in a specified position of the brain
The conduction of action potentials along an axon
The various techniques for measuring changes in the volume of blood in a particular part of the body
Axonal conduction opposite to the normal direction; conduction from axon terminals back toward the cell body