{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T03:21:39Z","timestamp":1787714499533,"version":"build-2784847793"},"reference-count":13,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T00:00:00Z","timestamp":1778457600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T00:00:00Z","timestamp":1778457600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/100007594","name":"Comenius University in Bratislava","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100007594","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Doc Ophthalmol"],"published-print":{"date-parts":[[2026,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>\n                      Spinocerebellar ataxia type 27B (SCA27B) is an autosomal dominant late-onset cerebellar ataxia caused by a pathogenic GAA repeat expansion in the\u00a0\n                      <jats:italic>FGF14<\/jats:italic>\n                      \u00a0gene. Although oculomotor abnormalities, particularly downbeat nystagmus, are well recognized, afferent visual pathway involvement has not been systematically investigated.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case presentation<\/jats:title>\n                    <jats:p>We report a 67-year-old man with genetically confirmed SCA27B who presented with a two-year history of progressive cerebellar and somatosensory ataxia, with a Scale for the Assessment and Rating of Ataxia (SARA)\u00a0score of 13. Neurological examination revealed typical oculomotor abnormalities, including downbeat nystagmus elicited during head-shaking testing. Brain MRI showed mild cerebellar atrophy. Electrophysiological studies demonstrated axonal sensory polyneuropathy and prolonged central conduction times on somatosensory evoked potentials. Comprehensive ophthalmological examination, including optical coherence tomography, showed no structural abnormalities. Pattern-reversal visual evoked potentials, recorded according to ISCEV standards, demonstrated mild bilateral prolongation of P100 latency, measuring 116\u00a0ms in the left eye and 115\u00a0ms in the right eye, with preserved amplitudes. Compared with laboratory normative data from individuals aged 60\u201370\u00a0years, these values exceeded the upper age-related reference limit.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This case suggests possible subclinical functional involvement of the post-retinal afferent visual pathways in SCA27B. However, the findings should be interpreted cautiously and confirmed in larger, age-matched cohorts.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s10633-026-10111-z","type":"journal-article","created":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T12:35:44Z","timestamp":1778502944000},"page":"143-147","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Visual evoked potential abnormalities in spinocerebellar ataxia type 27B: a case report"],"prefix":"10.1007","volume":"153","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5630-9822","authenticated-orcid":false,"given":"Pavol","family":"Skacik","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0348-3082","authenticated-orcid":false,"given":"Stefan","family":"Sivak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0464-0497","authenticated-orcid":false,"given":"Milan","family":"Grofik","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1025-6830","authenticated-orcid":false,"given":"Egon","family":"Kurca","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,5,11]]},"reference":[{"issue":"5","key":"10111_CR1","doi-asserted-by":"publisher","first-page":"410","DOI":"10.1016\/j.neurol.2024.03.007","volume":"180","author":"G Cl\u00e9ment","year":"2024","unstructured":"Cl\u00e9ment G, Puisieux S, Pellerin D, Brais B, Bonnet C, Renaud M (2024) Spinocerebellar ataxia 27B (SCA27B), a frequent late-onset cerebellar ataxia. 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We confirm that we have read the Journal\u2019s position on issues involved in ethical publication and affirm that this work is consistent with those guidelines. Written informed consent was obtained from the patient for participation.","order":2,"name":"Ethics","label":"Ethical approval","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Written informed consent was obtained from the patient for publication of this case report and any accompanying images and video materials.","order":3,"name":"Ethics","label":"Consent for publication","group":{"name":"EthicsHeading","label":"Declarations"}}]}}