{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T19:51:58Z","timestamp":1791143518043,"version":"4.1.0"},"reference-count":36,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2012,6,12]],"date-time":"2012-06-12T00:00:00Z","timestamp":1339459200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Movement Disorders"],"published-print":{"date-parts":[[2012,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Postural disturbances in advanced Parkinson's disease are less responsive to therapy than other cardinal motor signs. The vestibulocollic reflex represents one brain\u2010stem neuronal circuit involved in postural adjustments. The objective of this study was to investigate the vestibulocollic reflex in parkinsonian patients and the effects of subthalamic stimulation and dopa by recording vestibular\u2010evoked myogenic potentials. After overnight withdrawal of medication, 20 patients with Parkinson's disease with (6 men, 4 women; mean age, 64.4 \u00b1 2.2 years) or without (8 men, 2 women; mean age, 62.7 \u00b1 3.9 years) implanted subthalamic electrodes in different treatment conditions were compared with 10 age\u2010matched controls (5 men, 5 women; mean age, 59.6 \u00b1 2.4 years). Vestibular\u2010evoked myogenic potentials were recorded by electromyographic surface electrodes applied to both sternocleidomastoid muscles (band\u2010pass filter, 8\u20131600 Hz; sampling rate, 5 kHz) and averaged in response to bilateral auditory tone bursts (120 dB SPL; sine waves, 7 ms; 1000 Hz) applied through earphones. Adjusted vestibular\u2010evoked myogenic potential amplitudes were significantly smaller in parkinsonian patients than in controls, in particular in patients without surgery. Administration of dopa, but not subthalamic stimulation, significantly increased amplitudes. Onset latencies were similar for all groups and treatment conditions. Decreased vestibular\u2010evoked myogenic potential amplitudes in parkinsonian patients suggest reduced vestibular nuclei excitability within the brain stem, which is modulated by dopa but not by subthalamic stimulation. This suggests different pathways for the action of both treatment modalities in Parkinson's disease and may explain clinical differences in terms of postural disturbances. \u00a9 2012 Movement Disorder Society<\/jats:p>","DOI":"10.1002\/mds.25061","type":"journal-article","created":{"date-parts":[[2012,6,12]],"date-time":"2012-06-12T10:22:42Z","timestamp":1339496562000},"page":"1268-1275","source":"Crossref","is-referenced-by-count":49,"title":["Differential effect of dopa and subthalamic stimulation on vestibular activity in Parkinson's disease"],"prefix":"10.1002","volume":"27","author":[{"given":"Monika","family":"P\u00f6tter\u2010Nerger","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin M.","family":"Reich","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James 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