{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,5]],"date-time":"2025-02-05T23:40:37Z","timestamp":1738798837907,"version":"3.37.0"},"reference-count":0,"publisher":"American Academy of Audiology","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["j am acad audiol"],"published-print":{"date-parts":[[2006,2,1]]},"abstract":"<jats:p>Audiometric, electrophysiologic, and radiographic findings for a 68-year-old male with an \"imbalance\" concern are presented. This paper has a two-fold purpose: (1) to present an unusual electronystagmography case study and (2) to highlight the importance of test conditions\n in lesion localization. The specific disease pathophysiology remains obscure. Repeated hearing tests documented a known hearing impairment with worsening word-recognition ability of the right ear. An initial electronystagmographic exam was normal except for a mild ageotropic direction-changing\n positional nystagmus with eyes open and fixed. No repeatable click-evoked auditory brainstem response waveforms could be collected. A magnetic resonance imaging of the brain documents diffuse ischemic white matter disease. A repeated vestibular examination some months later supports the initial\n findings. The case illustrates the importance of following diagnostic protocol, of repeated measures, and of using both a visual fixation and a nonfixation condition for select electronystagmographic subtests. Se presentan los hallazgos audiom\u00e9tricos, electrofisiol\u00f3gicos y radiogr\u00e1ficos\n de un hombre de 68 a\u00f1os con una \"preocupaci\u00f3n\" en cu\u00e1nto a su equilibrio. Este art\u00edculo tiene un doble prop\u00f3sito: (1) presentar un estudio de caso electronistagmogr\u00e1fico inusual, y (2) destacar la importancia de las condiciones de la prueba\n en la localizaci\u00f3n de la lesi\u00f3n. La fisiopatolog\u00eda espec\u00edfica de la enfermedad en este caso sigue siendo obscura. Las pruebas auditivas repetidas documentaron un trastorno ya conocido de la audici\u00f3n, con una capacidad en deterioro del reconocimiento del lenguaje\n en el o\u00eddo derecho. El examen electronistagmogr\u00e1fico inicial fue normal excepto por un nistagmo de posici\u00f3n ageotr\u00f3pico leve de direcci\u00f3n cambiante, con los ojos abiertos y fijos. No se pudieron registrar ondas repetibles de respuesta auditiva del tallo cerebral\n evocadas por clic. Una resonancia magn\u00e9tica del cerebro document\u00f3 una enfermedad isqu\u00e9mica difusa de la sustancia blanca, desde el tallo cerebral a la corteza. Un nuevo examen vestibular, meses despu\u00e9s, apoy\u00f3 los hallazgos iniciales. El caso ilustra la importancia\n de seguir un protocolo diagn\u00f3stico, de las mediciones repetidas, y del uso tanto de condiciones visuales de fijaci\u00f3n y de no fijaci\u00f3n para seleccionar las sub-pruebas electronistagmogr\u00e1ficas.<\/jats:p>","DOI":"10.3766\/jaaa.17.2.2","type":"journal-article","created":{"date-parts":[[2008,4,22]],"date-time":"2008-04-22T23:54:28Z","timestamp":1208908468000},"page":"85-92","source":"Crossref","is-referenced-by-count":3,"title":["Positional Nystagmus of Central Origin"],"prefix":"10.3766","volume":"17","author":[{"given":"Frederick E.","family":"Cobb","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lauren B.","family":"Friedman","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2087","container-title":["Journal of the American Academy of Audiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ingentaconnect.com\/content\/aaa\/jaaa\/2006\/00000017\/00000002\/art00002","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,2,5]],"date-time":"2025-02-05T23:15:11Z","timestamp":1738797311000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ingentaconnect.com\/content\/10.3766\/jaaa.17.2.2"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2006,2,1]]},"references-count":0,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2006,2,1]]}},"alternative-id":["1050-0545(20060201)17:2L.85;1-"],"URL":"https:\/\/doi.org\/10.3766\/jaaa.17.2.2","relation":{},"ISSN":["1050-0545"],"issn-type":[{"type":"print","value":"1050-0545"}],"subject":[],"published":{"date-parts":[[2006,2,1]]}}}