As I see it there are a number of problems with this
Case Study of Ecstatic Meditation: fMRI and EEG Evidence of Self-Stimulating a Reward System.
1] It is nice to know that they used the term 'Ecstatic Meditation,'because as far as I know I coined the term, and I have used it extensively.
2] However, they are using terminology that relates to me without referencing me. That is a problem for their credibility on the topic of Ecstatic Meditation.
3] The article refers to access concentration. There is no place in the sutta pitaka of the Pali Canon where the concept of access concentration appears.
4] If the sutta pitaka of the Pali Canon does not refer to the concept of access concentration, then either: the sutta pitaka of the Pali Canon is an imperfect record of the meditation experience; the Abidhamma is a better record; or the Abidhamma is a flawed interpretation of the meditation experience.
5] While they claim that they used meditation subjects who could access all 8 stages of samadhi on demand, the claim is outrageous.