<prompt> Lucid Interval may be seen inIntracerebral haemorrhageInsanitySubdural haemorrhageAlcohol  <response>: Lucid interval- This is a period occurring in insanity during which all the symptoms of insanity disappear completely. Lucid interval refers to a brief period during which an insane person regains sanity that is sufficient to regain the legal capacity to contract and to act on hisher own behalf. Ref ganongs review of medical physiology 25e 