{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T02:43:05Z","timestamp":1784256185193,"version":"3.55.0"},"reference-count":44,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2023,8,28]],"date-time":"2023-08-28T00:00:00Z","timestamp":1693180800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Aging Neurosci."],"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>It is well known that motor features of Parkinson\u2019s disease (PD) commonly begin on one side of the body and extend to the other side with disease progression. The onset side generally remains more severely affected over the course of the disease. However, the pathophysiology underlying the asymmetry of motor manifestations remains unclear. The purpose of the present study is <jats:bold>t<\/jats:bold>o examine whether alterations in neuronal activity in the subthalamic nucleus (STN) associate with PD severity.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Microelectrode recording was performed in the STN during targeting for 30 patients in the treatment of deep brain stimulation. The mean spontaneous firing rate (MSFR), power density spectral analysis, and correlations were calculated. Characteristics of subthalamic oscillatory activity were compared between two hemispheres. UPDRS III scores during \u201cOff\u201d and \u201cOn\u201d states were obtained for the body side of initial symptoms (BSIS) and the body side of extended symptoms (BSES).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>There were significant differences of MSFR (41.3 \u00b1 11.0 Hz <jats:italic>vs<\/jats:italic> 35.2 \u00b1 10.0 Hz) and percentage of \u00df frequency oscillatory neurons (51.3% <jats:italic>vs<\/jats:italic> 34.9%) between BSIS and BSES. The percentage of \u00df frequency oscillatory neurons correlated with the bradykinesia\/rigidity scores for both sides (<jats:italic>p<\/jats:italic> &amp;lt; 0.05). In contrast, the percentage of tremor frequency oscillatory neurons was significantly higher in the BSES than that in the BSIS. In particular, these neurons only correlated with the tremor scores of the BSES (<jats:italic>p<\/jats:italic> &amp;lt; 0.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The results suggest that increased neuronal firing rate and \u00df frequency oscillatory neurons in the STN are associated with contralateral side motor severity and its progression. Tremor frequency oscillatory neurons are less observed in the STN of the BSIS suggesting that \u00df oscillatory activity dominates and tremor frequency oscillatory activity reciprocally declines.<\/jats:p><\/jats:sec>","DOI":"10.3389\/fnagi.2023.1185348","type":"journal-article","created":{"date-parts":[[2023,8,28]],"date-time":"2023-08-28T12:19:53Z","timestamp":1693225193000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Differences in subthalamic oscillatory activity in the two hemispheres associated with severity of Parkinson\u2019s disease"],"prefix":"10.3389","volume":"15","author":[{"given":"Xuemin","family":"Zhao","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ping","family":"Zhuang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark","family":"Hallett","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuqing","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianyu","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi","family":"Wen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiping","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yunpeng","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yongsheng","family":"Hu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yongjie","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2023,8,28]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"366","DOI":"10.1016\/0166-2236(89)90074-x","article-title":"The functional anatomy of basal ganglia disorders.","volume":"12","author":"Albin","year":"1989","journal-title":"Trends Neurosci"},{"key":"B2","doi-asserted-by":"publisher","first-page":"507","DOI":"10.1152\/jn.1994.72.2.507","article-title":"The primate subthalamic nucleus. 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