นักวิทยาศาสตร์ตะวันตกใช้ EEG วัดคลื่นสมองสมาธิ ขั้นสูง ฌาน 1-4
Summary
The teaching is sanditthiko and paccattaṃ — to be seen for oneself, known by oneself — which is exactly what makes external measurement interesting.
Dennison’s 2019 work recorded EEG from twenty-nine advanced practitioners and found distinct patterns by jhāna level.
The striking results: in the second jhāna the brainwaves run slower than in coma while the practitioner remains fully aware, and in the third the alpha rhythm present in every waking person disappears.
Key points
The levels the texts distinguish show up on the instrument
The interesting part is not that meditation is good for you but that the sutta ordering matches the data.
Slower than coma while fully aware is hard to explain
Within ordinary neuroscience that degree of slowing should come with loss of consciousness.
The vanishing alpha is a checkable marker
Alpha is present in every waking person, so its absence is unambiguously anomalous.
Measurability does not make brainwaves the goal
The data confirms something is happening. It does not change what jhāna is for.