Abacwaningi Izikhungo zezempilo zikazwelonke (NIH) ithole ukuthembela okukhulu komzimba emini ngama-80s. Ucwaningo lwabo lwaqinisekisa ngokuphawulekayo ukuthi ukuntuleka kokukhanya ebusika kungase kubangele ukuphazamiseka kwemizwelo. Ukukhanya kuvimbela ukukhiqizwa kwe-melatonin, ihomoni yokulala, futhi kukhuthaza ukukhiqizwa kwe-serotonin, ihomoni elisebenza ngokumelene nokucindezeleka. 

Namuhla, ngaphezu kwe-18% yabantu baseQuebec kanye nangaphezulu kwe-15% yabantu baseFrance bahlushwa blues yasebusika, okuthi lapho izimpawu ziqhubeka, kungaba ukucindezeleka kwesizini.

Izimpawu ze-blues zasebusika zenza impilo yansuku zonke ibe buhlungu kakhulu. Ukukhathala, ukuntula umdlandla, ukuthambekela kokuhlala uvalelwe, ubuvila, ubumnyama, ukudangala kanye nesithukuthezi kuvame ukuzwakala… kodwa akulungiseki. Zitholele izeluleko zethu zokulwa ne-blues encane yasebusika.