31. The only synesthetes who ever complain about synesthesia , 32. Many of his characters have a distinct " sensory appetite " reminiscent of synesthesia . 33. She is a co-founder of and consultant to the American Synesthesia Association. 34. Synesthesia ( stimulation of one sense experienced in a second sense ) may transpire.35. Both synesthesia and mitempfindung develop in early childhood and are highly variably among individuals. 36. Furthermore, synesthesia and mitempfindung are both unidirectional. 37. Note the spelling, also; it can be spelled synaesthesia, or synesthesia . 38. Both consistency studies and fMRI scans have validated JIW s lexical-gustatory synesthesia . 39. A possible resolution of these issues would involve defining synesthesia on a neurological basis. 40. Difficulties have been recognized in adequately defining synesthesia .