Involuntary memory

A famous example of involuntary memory is when, in his book In Search of Lost Time, Marcel Proust is reminded of his childhood by the taste of a madeleine cake dunked in tea.

Involuntary memory is a sub-component of memory that occurs when cues encountered in everyday life evoke recollections of the past without conscious effort. Voluntary memory, its opposite, is characterized by a deliberate effort to recall the past.