Tanja Singer is the taughter of word renowned brain scientist Wolf Singer. Tania Singer also worked with the French Buddhist monk Matthieu Ricard to investigate brain activity during meditation: https://en.wikipedia.org/wiki/Tania_Singer If we look at google scholar for «breath mediation» https://scholar.google.com/scholar?start=10&q=breath+meditation&hl=de&as_sdt=0,5 We can find there a paper of Tanja Singer: Is meditation always relaxing? Investigating heart …