<;P>;PROBLEM TO BE SOLVED: To obtain a polynucleotide etc. for detecting sleep deprivation, sleep disorder. <;P>;SOLUTION: The polynucleotide is hybridized with a polynucleotide sequence of transthyretin gene or its complementary sequence and is used for detecting sleep deprivation or sleep disorder. <;P>;COPYRIGHT: (C)2007,JPO&INPIT