WordNet

the spatial relation between something and the course along which it points or moves; "he checked the direction and velocity of the wind"
a message describing how something is to be done; "he gave directions faster than she could follow them" (同)instruction
a line leading to a place or point; "he looked the other direction"; "didnt know the way home" (同)way
a general course along which something has a tendency to develop; "I couldnt follow the direction of his thoughts"; "his ideals determined the direction of his career"; "they proposed a new direction for the firm"
involuntary movements of the eyeballs; its presence or absence is used to diagnose a variety of neurological and visual disorders
marked by continuous change or effective action (同)ever-changing

PrepTutorEJDIC

〈C〉〈U〉『方向』,方角;方面 / 〈C〉(思想・行動の)『傾向』,(事態が向かう)方向,(情報の)線 / 〈U〉『監督』,管理;指揮,指導 / 〈C〉《通例複数形で》(…についての)『指示』,指図,命令《+『for』(『about』)+『名』/+『asto』『名』(『wh-句』)》 / 〈U〉(音楽・演劇・映画などの)『指揮』,演出,監督

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Choi JY1,2, Lee SH3, Kim JS1,2.
Current opinion in neurology.Curr Opin Neurol.2018 Feb;31(1):81-89. doi: 10.1097/WCO.0000000000000511.
PMID 29084063

Direction-fixed and Direction-changing Positional Nystagmus in Ramsay Hunt Syndrome.

Kim CH1, Choi JW2, Han KJ1, Lee YS1, Shin JE1.
Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology.Otol Neurotol.2018 Jan 16. doi: 10.1097/MAO.0000000000001711. [Epub ahead of print]
PMID 29342047

Kim MB1, Hong SM2, Choi H3, Choi S3, Pham NC3, Shin JE3, Kim CH3.
Journal of audiology & otology.J Audiol Otol.2018 Jan;22(1):1-5. doi: 10.7874/jao.2017.00234. Epub 2017 Oct 24.
PMID 29061034

晝間清,大原章裕,肥塚泉
耳鼻咽喉科臨床 114(2), 97-102, 2021
… A 52-year-old man with SSNHL showed persistent geotropic direction-changing positional nystagmus (DCPN) in the head-roll test, which was at first thought to occur due to "a light cupula in the horizontal semicircular canal on the affected side." Six days later, the positional nystagmus changed to left beating direction fixed nystagmus (paralytic nystagmus). …
NAID 130007979484

滝本泰光,今井貴夫,山戸彰行,増村千佐子,原斉
Ｅｑｕｉｌｉｂｒｉｕｍ　Ｒｅｓｅａｒｃｈ 78(3), 185-191, 2019
… On clinical neurological examination, the Romberg test was positive, and he had spontaneous nystagmus toward the left side and direction-changing positional nystagmus. … Two months after the treatment, the vestibular symptoms resolved and the abnormal nystagmus disappeared completely.</p> …
NAID 130007687307

False-negative Magnetic Resonance Imaging Results in a Case of Cerebellar Infarction Presenting with Horizontal Direction-changing Ageotropic Positional Nystagmus

Kato Tomohisa,Kouzaki Hideaki,Owaki Shigehiro,Shimizu Takeshi
耳鼻咽喉科臨床　補冊 148(0), 8-9, 2017
… <p>We report false-negative magnetic resonance imaging (MRI) results in a case of cerebellar infarction presenting with horizontal direction-changing ageotropic positional nystagmus. … Physical examination revealed direction-changing positional nystagmus and gait disorder. …
NAID 130006789281