Below are some artists that use memory or the loss of it within their work...

Claire Tindale
http://www.axisweb.org/seCVWK.aspx?ARTISTID=15536
http://www.bankley.org.uk/Artist-Claire-Tindale

Beautiful images of found objects and manipulated everyday things, such as 'Memory Loss' - an artists book depicting an absent photo album.

Charlotte Donovan and Marie Brett

http://create-ireland.ie/evaluations-and-case-studies/case-study-memory-dress-by-charlotte-donovan-and-marie-brett.html

"The aim of the project was to involve different individuals and communities associated with St. Finbarr’s Hospital in the creation of unique, evocative artworks that celebrate and commemorate lives lived but not forgotten. Memory Dress afforded participants an opportunity for creative collaboration in an unlikely setting, creating a sense of community and empowerment within the hospital."

http://www.mariebrett.ie/index.html

http://www.mariebrett.ie/files/Unravelling_Arts_+_Health_Practice-Marie_Brett.pdf