There is a strong link between synesthesia and photographic memory (technically called eidetic memory) or at least heightened memory (hypermnesis). Many synesthetes used their synesthesia as a mnemonic aid.
Richard E. Cytowic
There is a strong link between synesthesia and photographic memory (technically called eidetic memory) or at least heightened memory (hypermnesis). Many synesthetes used their synesthesia as a mnemonic aid.