This week, the World Service marked World Alzheimer's Day with a BBC Music and Memory project, exploring the power of music to reach sufferers with the disease. It launched a website of global tracks to trigger memories, compiled with the help of the BBC's language services. Behzad Bolour compiled BBC Persian's list, his father suffered from dementia, but still sang with him. He also explores Iran’s complex relationship with music.

But what tracks does the rest of the world dance and remember to? We hear from BBC Arabic's Nahed Najjar, Adedayo Owolabi of BBC Yoruba, Kateryna Khinkulova of BBC Russian and Partha Prasad from the Indian languages hub in Delhi about some of the tracks they contributed to the world music database, and why.

Image: Elderly Indian lady listening on headphones looking at smartphone