mental block

mental block
    n 1: an inability to remember or think of something you normally
         can do; often caused by emotional tension; "I knew his name
         perfectly well but I had a temporary block" [syn: {block},
         {mental block}]
    

21 Moby Thesaurus words for "mental block":
      agnosia, block, blocking, conversion, defense mechanism, delirium,
      delusion, delusion of persecution, disorientation, flight of ideas,
      hallucination, hallucinosis, mental confusion, nihilism,
      nihilistic delusion, paralogia, psychological block, repression,
      sublimation, suppression, symbolization