Bendii Syndrome - Debilitating disease that affects the Vulcan race on the sci-fi adventure STAR TREK: THE NEXT GENERATION/SYN/1987-94. Bendii Syndrome, (a rare form of senile dementia) wreaks havoc on Vulcans over 200 years of age by breaking down their hold on logic which leads to irrational swings in emotion (something that Vulcans strive to suppress). On episodes No. 71 "Sarek" Ambassador Sarek (Mark Lenard) the father of Mr. Spock (Leonard Nimoy) was diagnosed with this mental malady. Sarek's disease made him cry and project intense emotions that caused crew members of the Enterprise to begin arguing/fighting among themselves. A Vulcan mind-meld with Captain Jean Luc Picard (Patrick Stewart) helped stabilize Sarek's mind long enough to finish his diplomatic negotiations. On episodes NO.108/109 "Unification" Sarek dies on Vulcan in 2368 from degenerative complications from Bendii Syndrome.