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Research in Vestibular Science > Volume 11(3); 2012 > Article
Research in Vestibular Science 2012;11(3): 105-109.
교뇌 경색에 의한 원지성 방향전환성 두위안진
손혜란, 정재윤, 서명환
단국대학교의과대학 이비인후‐두경부외과학교실
Apogeotropic Positional Nystagmus in Pontine Infarction
Hye Ran Son, Jae Yun Jung, Myung Whan Suh
Department of Otorhinolaryngology-Head and Neck Surgery, Dankook University College of Medicine, Cheonan, Korea. drmung@naver.com
ABSTRACT
It is thought that horizontal canal benign paroxysmal positional vertigo (BPPV) is the most common cause of apogeotropic direction-changing positional nystagmus (DCPN). But there are many reports about cerebellar or brainstem lesions as the cause of apogeotropic DCPN. We also report a 72-year-old male patient who showed apogeotropic DCPN, but was proven to have a pontine infarction. The patients complained of disequilibrium which has lasted for 3-4 years and aggravated recently. The symptom was present only when he stood up, and was absent as soon as he sat down. He was not able to successfully perform the Romberg test and tandem gait on physical examination. Vestibular function test revealed apogeotropic DCPN without spontaneous nystagmus. Rotation chair test and caloric test results were all within normal limit. On the brain magnetic resonance imaging, newly detected infarction in the left basal ganglia, pons and right parietal lobe was found. Although horizontal canal BPPV is the most common cause of apogeotropic DCPN, we should be aware that there can be patients with central origin DCPN. In this report, we present the detailed history of this patient and tried to point out the clues to suspect central lesion in patients with apogeotropic DCPN.
Keywords: Positional nystagmus; Central origin vertigo
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