<prompt> All are features in our of seizure over syncope exceptNo precipitating factorsBecame immediately unconsciousnessTonicor clonic seizures lasting more than 60 secondsNausea, tunneling of vision  <response>: Features That Distinguish Generalized Tonic-Clonic Seizure from SyncopeFeaturesSeizureSyncopeImmediate precipitating factorsUsually none Emotional stress, Valsalva, ohostatic hypotension, cardiacetiologiesPremonitory symptoms None or aura e.g., odd odorTiredness, nausea, diaphoresis, tunnelling of visionPosture at onset VariableUsually erectTransition to unconsciousnessOften immediateGradual over secondsDuration of unconsciousnessMinutes SecondsDuration of tonic or clonic movements30-60 sNever more than 15 sFacial appearance during eventCyanosis, frothing at mouthPalorDisorientation and sleepiness after eventMany minutes to hours 5minAching of muscles after eventOftenSometimesBiting of tongueSometimesRarelyIncontinenceSometimesSometimesHeadacheSometimesRarelyRef: Harrison 19e 2547 