Guides
A score tells you what happened. These are about why — written plainly, and honest about the places where the evidence is genuinely mixed rather than only about the places where it is convenient.
Understanding EEG
Ninug measures brain activity, so these come first. What the signal is, what it can honestly show, and where the popular claims run ahead of the evidence.
Electroencephalography measures the brain at the speed it works. What the signal is, where it comes from, and the three questions that separate a real claim from a marketing one.
Read the guide →
The five bands are slices of the frequency spectrum, not moods. What each is associated with, and why every one of them is looser than the charts suggest.
Read the guide →
A headband is not a small clinical system. What dry contacts, few channels and a forehead position cost — and what is still genuinely measurable.
Read the guide →
Almost every bad recording is a contact problem. Why silver–silver chloride, what impedance really costs you, and why matching matters more than magnitude.
Read the guide →
One letter apart and about a thousand times different in size. What each measures, and why the heart turns up in brain recordings but never the other way round.
Read the guide →
Sleep stages are an EEG definition, not a heart-rate inference. What spindles and slow waves are, and which stages a wearable can honestly claim.
Read the guide →
Attention has real EEG correlates and no reliable single-number readout. What the research supports, where neurofeedback stands, and why focus scores overreach.
Read the guide →
Readiness scores are HRV with a wrapper. What the brain adds, graded honestly from well supported to not established.
Read the guide →
Decades old in research, almost absent in practice, and mostly held back by fur. What differs between dogs, horses and ruminants.
Read the guide →
Why two devices give different deep sleep numbers for the same night, and which parts of the reading are worth acting on.
Read the guide →
The post-lunch dip appears in people who ate nothing. What actually causes it, and why it lands at a different hour for different people.
Read the guide →
What the research found, where it is genuinely contested, and the intervention that costs nothing and takes five minutes.
Read the guide →
A busy road costs less than one audible conversation. Why speech is the expensive kind of noise, and what helps.
Read the guide →
The shift to a later body clock at puberty is biological and measurable. What helps when the timetable will not move.
Read the guide →
The most over-interpreted number on any wearable. Why comparing yours to anyone else is meaningless.
Read the guide →
Almost nobody knows they do it until a dentist says so. Why the jaw is loud to a forehead sensor and invisible to a wrist.
Read the guide →
A horse can doze standing but cannot reach REM without lying down. Why recumbency matters and what stops it.
Read the guide →