See the rhythm.
Count the cycles.
Learn the four core EEG frequency bands, then practice measuring and naming them with confidence.
Four bands. One simple idea.
Frequency is speed: the number of complete cycles in one second.
Slide through the bands
Watch the cycles tighten as frequency increases.
Fewer than 4 cycles per second. Slow does not automatically mean abnormal.
Name the speed—not the diagnosis. Band labels alone do not tell you if activity is normal, abnormal, cerebral, or artifact.
Measure before you label.
Use the same method every time: window → cycles → calculation → band.
Step 1 · Measure
How many cycles occur in this window?
Count peak to peak. Only include complete cycles.
Tech tip: Never assume the whole screen equals one second. Find the actual time marker before counting.
Lock in the skill.
Five quick questions. Score 4 of 5 to pass.
A short check—not a trick test.
You’ll measure, classify, and separate frequency from other EEG features.
Measurement
Nice work.
You can measure a known window, calculate hertz, and apply the core band labels.