meow

alpha waves 

10 hz

alpha= routing mechanism, shutting down regions actively that are not needed 

By attending to something, alpha has an increase on the other side, because it's inhibited, you don't pay attention to that region, and alpha goes down on the attended side 

artifact

muscle, movement, or bones that block the eeg signal 

intracranial eeg

places electrodes directly into the brain

more localised signal in real time

demyelination

e.g multiple sclerosis

no swan cells or myelin sheaths for the axon 

Issue; conductivity, communication of the neuron breaks down 

Results in vision loss, communication issues, etc

parameters of a wave

• amplitude/ power

• frequency

• speed

• height

beta waves

13-30 hz

theta waves

4-8 hz

most commonly associated with motor cortex, but also with concentration, executive functioning, frontal cortex jobs 

• Specific fingerprint of highly concentrated top down thinking 

delta

0.5-4 hz

slow wave sleep 

spontaneous synchrony

slow oscillation= synchrony 

Oscillation is when they fire in a rhythmic pattern 

alpha oscillations prevent firing in a phasic manner

• ‘pulsed inhibition’  

Rhythmic pattern that has cumulative input onto the intake neuron and post synaptic neurons, so they get enough energy to create an action potential and fire, then pass it along to the next one 

TIME-FREQUENCY PLOTS.

• the x axis is time

• the y axis is the frequency

• the increase and/or decrease is shown in the colour temperature (blue vs red)