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Published in: Trials 1/2024

Open Access 01-12-2024 | Deep Brain Stimulation | Study protocol

A multicenter double-blind randomized crossover study comparing the impact of dorsal subthalamic nucleus deep brain stimulation versus standard care on apathy in Parkinson’s disease: a study protocol

Authors: T. J. C. Zoon, G. van Rooijen, M. F. Contarino, S. van der Gaag, R. Zutt, J. T. van Asseldonk, P. van den Munckhof, P. R. Schuurman, D. A. J. P. Denys, R. M. A. de Bie

Published in: Trials | Issue 1/2024

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Abstract

Background

Neuroimaging studies suggest an association between apathy after deep brain stimulation (DBS) and stimulation of the ventral part of the subthalamic nucleus (STN) due to the associative fibers connected to the non-motor limbic circuits that are involved in emotion regulation and motivation. We have previously described three patients with severe apathy that could be fully treated after switching stimulation from a ventral electrode contact point to a more dorsal contact point.

Objectives

To determine whether more dorsal stimulation of the STN decreases apathy compared to standard care in a multicenter randomized controlled trial with a crossover design.

Methods

We will include 26 patients with a Starkstein Apathy Scale (SAS) score of 14 or more after subthalamic nucleus (STN) deep brain stimulation (DBS) for refractory Parkinson’s disease. This is a multicenter trial conducted in two teaching hospitals and one university medical center in the Netherlands after at least 3 months of STN DBS. Our intervention will consist of 1 month of unilateral dorsal STN stimulation compared to treatment as usual. The primary outcome is a change in SAS score following 1 month of DBS on the original contact compared to the SAS score following 1 month of DBS on the more dorsal contact. Secondary outcomes are symptom changes on the Movement Disorders Society-Unified Parkinson’s Disease Rating Scale motor part III, Montgomery-Åsberg Depression Rating Scale, 39-item Parkinson’s disease questionnaire, Parkinson’s disease impulsive-compulsive disorders questionnaire, changes in levodopa-equivalent daily dosage, apathy rated by the caregiver, and burden and quality of life of the caregiver.

Trial registration

ClinicalTrials.gov NL8279. Registered on January 10, 2020.
Appendix
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Literature
1.
go back to reference Odekerken VJ, van Laar T, Staal MJ, Mosch A, Hoffmann CF, Nijssen PC, et al. Subthalamic nucleus versus globus pallidus bilateral deep brain stimulation for advanced Parkinson’s disease (NSTAPS study): a randomised controlled trial. Lancet Neurol. 2013;12(1):37–44.PubMedCrossRef Odekerken VJ, van Laar T, Staal MJ, Mosch A, Hoffmann CF, Nijssen PC, et al. Subthalamic nucleus versus globus pallidus bilateral deep brain stimulation for advanced Parkinson’s disease (NSTAPS study): a randomised controlled trial. Lancet Neurol. 2013;12(1):37–44.PubMedCrossRef
2.
go back to reference Krack P, Batir A, Van Blercom N, Chabardes S, Fraix V, Ardouin C, et al. Five-year follow-up of bilateral stimulation of the subthalamic nucleus in advanced Parkinson’s disease. N Engl J Med. 2003;349(20):1925–34.PubMedCrossRef Krack P, Batir A, Van Blercom N, Chabardes S, Fraix V, Ardouin C, et al. Five-year follow-up of bilateral stimulation of the subthalamic nucleus in advanced Parkinson’s disease. N Engl J Med. 2003;349(20):1925–34.PubMedCrossRef
3.
go back to reference Lhommee E, Wojtecki L, Czernecki V, Witt K, Maier F, Tonder L, et al. Behavioural outcomes of subthalamic stimulation and medical therapy versus medical therapy alone for Parkinson’s disease with early motor complications (EARLYSTIM trial): secondary analysis of an open-label randomised trial. Lancet Neurol. 2018;17(3):223–31.PubMedCrossRef Lhommee E, Wojtecki L, Czernecki V, Witt K, Maier F, Tonder L, et al. Behavioural outcomes of subthalamic stimulation and medical therapy versus medical therapy alone for Parkinson’s disease with early motor complications (EARLYSTIM trial): secondary analysis of an open-label randomised trial. Lancet Neurol. 2018;17(3):223–31.PubMedCrossRef
4.
go back to reference Zoon TJC, van Rooijen G, Balm G, Bergfeld IO, Daams JG, Krack P, et al. Apathy induced by subthalamic nucleus deep brain stimulation in Parkinson’s disease: a meta-analysis. Mov Disord. 2021;36(2):317–26.PubMedCrossRef Zoon TJC, van Rooijen G, Balm G, Bergfeld IO, Daams JG, Krack P, et al. Apathy induced by subthalamic nucleus deep brain stimulation in Parkinson’s disease: a meta-analysis. Mov Disord. 2021;36(2):317–26.PubMedCrossRef
5.
go back to reference Santangelo G, Trojano L, Barone P, Errico D, Grossi D, Vitale C. Apathy in Parkinson’s disease: diagnosis, neuropsychological correlates, pathophysiology and treatment. Behav Neurol. 2013;27(4):501–13.PubMedPubMedCentralCrossRef Santangelo G, Trojano L, Barone P, Errico D, Grossi D, Vitale C. Apathy in Parkinson’s disease: diagnosis, neuropsychological correlates, pathophysiology and treatment. Behav Neurol. 2013;27(4):501–13.PubMedPubMedCentralCrossRef
6.
go back to reference Martinez-Fernandez R, Pelissier P, Quesada JL, Klinger H, Lhommee E, Schmitt E, et al. Postoperative apathy can neutralise benefits in quality of life after subthalamic stimulation for Parkinson’s disease. J Neurol Neurosurg Psychiatry. 2016;87(3):311–8.PubMedCrossRef Martinez-Fernandez R, Pelissier P, Quesada JL, Klinger H, Lhommee E, Schmitt E, et al. Postoperative apathy can neutralise benefits in quality of life after subthalamic stimulation for Parkinson’s disease. J Neurol Neurosurg Psychiatry. 2016;87(3):311–8.PubMedCrossRef
7.
go back to reference Ricciardi L, Morgante L, Epifanio A, Zibetti M, Lanotte M, Lopiano L, Morgante F. Stimulation of the subthalamic area modulating movement and behavior. Parkinsonism Relat Disord. 2014;20(11):1298–300.PubMedCrossRef Ricciardi L, Morgante L, Epifanio A, Zibetti M, Lanotte M, Lopiano L, Morgante F. Stimulation of the subthalamic area modulating movement and behavior. Parkinsonism Relat Disord. 2014;20(11):1298–300.PubMedCrossRef
8.
go back to reference Crespo-Burillo JA, Rivero-Celada D, Saenz-de Cabezon A, Casado-Pellejero J, Alberdi-Vinas J, Alarcia-Alejos R. Deep brain stimulation for patients with Parkinson’s disease: effect on caregiver burden. Neurologia. 2018;33(3):154–9.PubMedCrossRef Crespo-Burillo JA, Rivero-Celada D, Saenz-de Cabezon A, Casado-Pellejero J, Alberdi-Vinas J, Alarcia-Alejos R. Deep brain stimulation for patients with Parkinson’s disease: effect on caregiver burden. Neurologia. 2018;33(3):154–9.PubMedCrossRef
9.
go back to reference Pagonabarraga J, Kulisevsky J, Strafella AP, Krack P. Apathy in Parkinson’s disease: clinical features, neural substrates, diagnosis, and treatment. Lancet Neurol. 2015;14(5):518–31.PubMedCrossRef Pagonabarraga J, Kulisevsky J, Strafella AP, Krack P. Apathy in Parkinson’s disease: clinical features, neural substrates, diagnosis, and treatment. Lancet Neurol. 2015;14(5):518–31.PubMedCrossRef
10.
go back to reference Starkstein SE, Leentjens AF. The nosological position of apathy in clinical practice. J Neurol Neurosurg Psychiatry. 2008;79(10):1088–92.PubMedCrossRef Starkstein SE, Leentjens AF. The nosological position of apathy in clinical practice. J Neurol Neurosurg Psychiatry. 2008;79(10):1088–92.PubMedCrossRef
11.
go back to reference Groenewegen HJ, Wright CI, Uylings HB. The anatomical relationships of the prefrontal cortex with limbic structures and the basal ganglia. J Psychopharmacol. 1997;11(2):99–106.PubMedCrossRef Groenewegen HJ, Wright CI, Uylings HB. The anatomical relationships of the prefrontal cortex with limbic structures and the basal ganglia. J Psychopharmacol. 1997;11(2):99–106.PubMedCrossRef
12.
go back to reference Mega MS, Cummings JL, Salloway S, Malloy P. The limbic system: an anatomic, phylogenetic, and clinical perspective. J Neuropsychiatry Clin Neurosci. 1997;9(3):315–30.PubMedCrossRef Mega MS, Cummings JL, Salloway S, Malloy P. The limbic system: an anatomic, phylogenetic, and clinical perspective. J Neuropsychiatry Clin Neurosci. 1997;9(3):315–30.PubMedCrossRef
13.
go back to reference Thobois S, Ardouin C, Lhommee E, Klinger H, Lagrange C, Xie J, et al. Non-motor dopamine withdrawal syndrome after surgery for Parkinson’s disease: predictors and underlying mesolimbic denervation. Brain. 2010;133(Pt 4):1111–27.PubMedCrossRef Thobois S, Ardouin C, Lhommee E, Klinger H, Lagrange C, Xie J, et al. Non-motor dopamine withdrawal syndrome after surgery for Parkinson’s disease: predictors and underlying mesolimbic denervation. Brain. 2010;133(Pt 4):1111–27.PubMedCrossRef
14.
go back to reference Thobois S, Lhommee E, Klinger H, Ardouin C, Schmitt E, Bichon A, et al. Parkinsonian apathy responds to dopaminergic stimulation of D2/D3 receptors with piribedil. Brain. 2013;136(Pt 5):1568–77.PubMedCrossRef Thobois S, Lhommee E, Klinger H, Ardouin C, Schmitt E, Bichon A, et al. Parkinsonian apathy responds to dopaminergic stimulation of D2/D3 receptors with piribedil. Brain. 2013;136(Pt 5):1568–77.PubMedCrossRef
15.
go back to reference Brown RG, Pluck G. Negative symptoms: the ‘pathology’ of motivation and goal-directed behaviour. Trends Neurosci. 2000;23(9):412–7.PubMedCrossRef Brown RG, Pluck G. Negative symptoms: the ‘pathology’ of motivation and goal-directed behaviour. Trends Neurosci. 2000;23(9):412–7.PubMedCrossRef
16.
go back to reference Stefurak T, Mikulis D, Mayberg H, Lang AE, Hevenor S, Pahapill P, et al. Deep brain stimulation for Parkinson’s disease dissociates mood and motor circuits: a functional MRI case study. Mov Disord. 2003;18(12):1508–16.PubMedCrossRef Stefurak T, Mikulis D, Mayberg H, Lang AE, Hevenor S, Pahapill P, et al. Deep brain stimulation for Parkinson’s disease dissociates mood and motor circuits: a functional MRI case study. Mov Disord. 2003;18(12):1508–16.PubMedCrossRef
17.
go back to reference Higuchi MA, Tsuboi Y, Inoue T, Fukuyama K, Abe H, Baba Y, Yamada T. Predictors of the emergence of apathy after bilateral stimulation of the subthalamic nucleus in patients with Parkinson’s disease. Neuromodulation. 2015;18(2):113–7.PubMedCrossRef Higuchi MA, Tsuboi Y, Inoue T, Fukuyama K, Abe H, Baba Y, Yamada T. Predictors of the emergence of apathy after bilateral stimulation of the subthalamic nucleus in patients with Parkinson’s disease. Neuromodulation. 2015;18(2):113–7.PubMedCrossRef
18.
go back to reference Zoon TJ, de Bie RM, Schuurman PR, van den Munckhof P, Denys D, Figee M. Resolution of apathy after dorsal instead of ventral subthalamic deep brain stimulation for Parkinson’s disease. J Neurol. 2019;266(5):1267–9.PubMedCrossRef Zoon TJ, de Bie RM, Schuurman PR, van den Munckhof P, Denys D, Figee M. Resolution of apathy after dorsal instead of ventral subthalamic deep brain stimulation for Parkinson’s disease. J Neurol. 2019;266(5):1267–9.PubMedCrossRef
19.
go back to reference Starkstein SE, Mayberg HS, Preziosi TJ, Andrezejewski P, Leiguarda R, Robinson RG. Reliability, validity, and clinical correlates of apathy in Parkinson’s disease. J Neuropsychiatry Clin Neurosci. 1992;4(2):134–9.PubMedCrossRef Starkstein SE, Mayberg HS, Preziosi TJ, Andrezejewski P, Leiguarda R, Robinson RG. Reliability, validity, and clinical correlates of apathy in Parkinson’s disease. J Neuropsychiatry Clin Neurosci. 1992;4(2):134–9.PubMedCrossRef
20.
go back to reference Goetz CG, Tilley BC, Shaftman SR, Stebbins GT, Fahn S, Martinez-Martin P, et al. Movement Disorder Society-sponsored revision of the Unified Parkinson’s Disease Rating Scale (MDS-UPDRS): scale presentation and clinimetric testing results. Mov Disord. 2008;23(15):2129–70.PubMedCrossRef Goetz CG, Tilley BC, Shaftman SR, Stebbins GT, Fahn S, Martinez-Martin P, et al. Movement Disorder Society-sponsored revision of the Unified Parkinson’s Disease Rating Scale (MDS-UPDRS): scale presentation and clinimetric testing results. Mov Disord. 2008;23(15):2129–70.PubMedCrossRef
21.
go back to reference Montgomery SA, Asberg M. A new depression scale designed to be sensitive to change. Br J Psychiatry. 1979;134:382–9.PubMedCrossRef Montgomery SA, Asberg M. A new depression scale designed to be sensitive to change. Br J Psychiatry. 1979;134:382–9.PubMedCrossRef
22.
go back to reference Jenkinson C, Fitzpatrick R, Peto V, Greenhall R, Hyman N. The Parkinson’s disease questionnaire (PDQ-39): development and validation of a Parkinson’s disease summary index score. Age Ageing. 1997;26(5):353–7.PubMedCrossRef Jenkinson C, Fitzpatrick R, Peto V, Greenhall R, Hyman N. The Parkinson’s disease questionnaire (PDQ-39): development and validation of a Parkinson’s disease summary index score. Age Ageing. 1997;26(5):353–7.PubMedCrossRef
23.
go back to reference Weintraub D, Hoops S, Shea JA, Lyons KE, Pahwa R, Driver-Dunckley ED, et al. Validation of the questionnaire for impulsive-compulsive disorders in Parkinson’s disease. Mov Disord. 2009;24(10):1461–7.PubMedPubMedCentralCrossRef Weintraub D, Hoops S, Shea JA, Lyons KE, Pahwa R, Driver-Dunckley ED, et al. Validation of the questionnaire for impulsive-compulsive disorders in Parkinson’s disease. Mov Disord. 2009;24(10):1461–7.PubMedPubMedCentralCrossRef
24.
go back to reference Tomlinson CL, Stowe R, Patel S, Rick C, Gray R, Clarke CE. Systematic review of levodopa dose equivalency reporting in Parkinson’s disease. Mov Disord. 2010;25(15):2649–53.PubMedCrossRef Tomlinson CL, Stowe R, Patel S, Rick C, Gray R, Clarke CE. Systematic review of levodopa dose equivalency reporting in Parkinson’s disease. Mov Disord. 2010;25(15):2649–53.PubMedCrossRef
25.
go back to reference Marin RS, Biedrzycki RC, Firinciogullari S. Reliability and validity of the Apathy Evaluation Scale. Psychiatry Res. 1991;38(2):143–62.PubMedCrossRef Marin RS, Biedrzycki RC, Firinciogullari S. Reliability and validity of the Apathy Evaluation Scale. Psychiatry Res. 1991;38(2):143–62.PubMedCrossRef
26.
go back to reference Ware JE Jr, Sherbourne CD. The MOS 36-Item Short-Form Health Survey (SF-36). I. Conceptual framework and item selection. Med Care. 1992;30(6):473–83.PubMedCrossRef Ware JE Jr, Sherbourne CD. The MOS 36-Item Short-Form Health Survey (SF-36). I. Conceptual framework and item selection. Med Care. 1992;30(6):473–83.PubMedCrossRef
27.
go back to reference Odekerken VJ, Boel JA, Schmand BA, de Haan RJ, Figee M, van den Munckhof P, et al. GPi vs STN deep brain stimulation for Parkinson disease: three-year follow-up. Neurology. 2016;86(8):755–61.PubMedCrossRef Odekerken VJ, Boel JA, Schmand BA, de Haan RJ, Figee M, van den Munckhof P, et al. GPi vs STN deep brain stimulation for Parkinson disease: three-year follow-up. Neurology. 2016;86(8):755–61.PubMedCrossRef
28.
go back to reference Holewijn RA, Verbaan D, van den Munckhof PM, Bot M, Geurtsen GJ, Dijk JM, et al. General anesthesia vs local anesthesia in microelectrode recording-guided deep-brain stimulation for parkinson disease: the GALAXY randomized clinical trial. JAMA Neurol. 2021;78(10):1212–9.PubMedCrossRef Holewijn RA, Verbaan D, van den Munckhof PM, Bot M, Geurtsen GJ, Dijk JM, et al. General anesthesia vs local anesthesia in microelectrode recording-guided deep-brain stimulation for parkinson disease: the GALAXY randomized clinical trial. JAMA Neurol. 2021;78(10):1212–9.PubMedCrossRef
29.
go back to reference Geraedts VJ, van Ham RAP, Marinus J, van Hilten JJ, Mosch A, Hoffmann CFE, et al. Intraoperative test stimulation of the subthalamic nucleus aids postoperative programming of chronic stimulation settings in Parkinson’s disease. Parkinsonism Relat Disord. 2019;65:62–6.PubMedCrossRef Geraedts VJ, van Ham RAP, Marinus J, van Hilten JJ, Mosch A, Hoffmann CFE, et al. Intraoperative test stimulation of the subthalamic nucleus aids postoperative programming of chronic stimulation settings in Parkinson’s disease. Parkinsonism Relat Disord. 2019;65:62–6.PubMedCrossRef
30.
go back to reference Czernecki V, Schupbach M, Yaici S, Levy R, Bardinet E, Yelnik J, et al. Apathy following subthalamic stimulation in Parkinson disease: a dopamine responsive symptom. Mov Disord. 2008;23(7):964–9.PubMedCrossRef Czernecki V, Schupbach M, Yaici S, Levy R, Bardinet E, Yelnik J, et al. Apathy following subthalamic stimulation in Parkinson disease: a dopamine responsive symptom. Mov Disord. 2008;23(7):964–9.PubMedCrossRef
32.
go back to reference Leentjens AF, Dujardin K, Marsh L, Martinez-Martin P, Richard IH, Starkstein SE, et al. Apathy and anhedonia rating scales in Parkinson’s disease: critique and recommendations. Mov Disord. 2008;23(14):2004–14.PubMedCrossRef Leentjens AF, Dujardin K, Marsh L, Martinez-Martin P, Richard IH, Starkstein SE, et al. Apathy and anhedonia rating scales in Parkinson’s disease: critique and recommendations. Mov Disord. 2008;23(14):2004–14.PubMedCrossRef
33.
go back to reference Davidson J, Turnbull CD, Strickland R, Miller R, Graves K. The Montgomery-Asberg Depression Scale: reliability and validity. Acta Psychiatr Scand. 1986;73(5):544–8.PubMedCrossRef Davidson J, Turnbull CD, Strickland R, Miller R, Graves K. The Montgomery-Asberg Depression Scale: reliability and validity. Acta Psychiatr Scand. 1986;73(5):544–8.PubMedCrossRef
34.
go back to reference Tan LC, Luo N, Nazri M, Li SC, Thumboo J. Validity and reliability of the PDQ-39 and the PDQ-8 in English-speaking Parkinson’s disease patients in Singapore. Parkinsonism Relat Disord. 2004;10(8):493–9.PubMedCrossRef Tan LC, Luo N, Nazri M, Li SC, Thumboo J. Validity and reliability of the PDQ-39 and the PDQ-8 in English-speaking Parkinson’s disease patients in Singapore. Parkinsonism Relat Disord. 2004;10(8):493–9.PubMedCrossRef
35.
go back to reference Probst CC, Winter LM, Moller B, Weber H, Weintraub D, Witt K, et al. Validation of the questionnaire for impulsive-compulsive disorders in Parkinson’s disease (QUIP) and the QUIP-rating scale in a German speaking sample. J Neurol. 2014;261(5):936–42.PubMedPubMedCentralCrossRef Probst CC, Winter LM, Moller B, Weber H, Weintraub D, Witt K, et al. Validation of the questionnaire for impulsive-compulsive disorders in Parkinson’s disease (QUIP) and the QUIP-rating scale in a German speaking sample. J Neurol. 2014;261(5):936–42.PubMedPubMedCentralCrossRef
36.
go back to reference Brazier JE, Harper R, Jones NM, O’Cathain A, Thomas KJ, Usherwood T, Westlake L. Validating the SF-36 health survey questionnaire: new outcome measure for primary care. BMJ. 1992;305(6846):160–4.PubMedPubMedCentralCrossRef Brazier JE, Harper R, Jones NM, O’Cathain A, Thomas KJ, Usherwood T, Westlake L. Validating the SF-36 health survey questionnaire: new outcome measure for primary care. BMJ. 1992;305(6846):160–4.PubMedPubMedCentralCrossRef
37.
go back to reference Ishihara L, Brayne C. A systematic review of depression and mental illness preceding Parkinson’s disease. Acta Neurol Scand. 2006;113(4):211–20.PubMedCrossRef Ishihara L, Brayne C. A systematic review of depression and mental illness preceding Parkinson’s disease. Acta Neurol Scand. 2006;113(4):211–20.PubMedCrossRef
38.
go back to reference Schuepbach WM, Rau J, Knudsen K, Volkmann J, Krack P, Timmermann L, et al. Neurostimulation for Parkinson’s disease with early motor complications. N Engl J Med. 2013;368(7):610–22.PubMedCrossRef Schuepbach WM, Rau J, Knudsen K, Volkmann J, Krack P, Timmermann L, et al. Neurostimulation for Parkinson’s disease with early motor complications. N Engl J Med. 2013;368(7):610–22.PubMedCrossRef
39.
go back to reference Czernecki V, Pillon B, Houeto JL, Welter ML, Mesnage V, Agid Y, Dubois B. Does bilateral stimulation of the subthalamic nucleus aggravate apathy in Parkinson’s disease? J Neurol Neurosurg Psychiatry. 2005;76(6):775–9.PubMedPubMedCentralCrossRef Czernecki V, Pillon B, Houeto JL, Welter ML, Mesnage V, Agid Y, Dubois B. Does bilateral stimulation of the subthalamic nucleus aggravate apathy in Parkinson’s disease? J Neurol Neurosurg Psychiatry. 2005;76(6):775–9.PubMedPubMedCentralCrossRef
40.
go back to reference Funkiewiez A, Ardouin C, Krack P, Fraix V, Van Blercom N, Xie J, et al. Acute psychotropic effects of bilateral subthalamic nucleus stimulation and levodopa in Parkinson’s disease. Mov Disord. 2003;18(5):524–30.PubMedCrossRef Funkiewiez A, Ardouin C, Krack P, Fraix V, Van Blercom N, Xie J, et al. Acute psychotropic effects of bilateral subthalamic nucleus stimulation and levodopa in Parkinson’s disease. Mov Disord. 2003;18(5):524–30.PubMedCrossRef
41.
go back to reference Fabbri M, Coelho M, Abreu D, Guedes LC, Rosa MM, Godinho C, et al. Dysphagia predicts poor outcome in late-stage Parkinson’s disease. Parkinsonism Relat Disord. 2019;64:73–81.PubMedCrossRef Fabbri M, Coelho M, Abreu D, Guedes LC, Rosa MM, Godinho C, et al. Dysphagia predicts poor outcome in late-stage Parkinson’s disease. Parkinsonism Relat Disord. 2019;64:73–81.PubMedCrossRef
43.
go back to reference Drapier D, Drapier S, Sauleau P, Haegelen C, Raoul S, Biseul I, et al. Does subthalamic nucleus stimulation induce apathy in Parkinson’s disease? J Neurol. 2006;253(8):1083–91.PubMedCrossRef Drapier D, Drapier S, Sauleau P, Haegelen C, Raoul S, Biseul I, et al. Does subthalamic nucleus stimulation induce apathy in Parkinson’s disease? J Neurol. 2006;253(8):1083–91.PubMedCrossRef
Metadata
Title
A multicenter double-blind randomized crossover study comparing the impact of dorsal subthalamic nucleus deep brain stimulation versus standard care on apathy in Parkinson’s disease: a study protocol
Authors
T. J. C. Zoon
G. van Rooijen
M. F. Contarino
S. van der Gaag
R. Zutt
J. T. van Asseldonk
P. van den Munckhof
P. R. Schuurman
D. A. J. P. Denys
R. M. A. de Bie
Publication date
01-12-2024
Publisher
BioMed Central
Published in
Trials / Issue 1/2024
Electronic ISSN: 1745-6215
DOI
https://doi.org/10.1186/s13063-024-07938-9

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