Background: Patients with Parkinson's disease (PD) and rest tremor may also have tremor during posture holding, with tremor being transiently suppressed during the transition between resting and posture holding. Other PD patients show no tremor suppression between resting and posture holding. The mechanisms responsible for tremor suppression in PD are unknown. Understanding the mechanisms of tremor suppression would expand our knowledge of tremor pathophysiology in PD.Objective: To investigate whether tremor suppression reflects the activity of the primary motor cortex (M1) and assess whether tremor features are different in patients with and without tremor suppression.Methods: We compared corticomuscular coherence (CMC) at tremor frequency and transcranial magnetic stimulation tremor resetting between 10 PD patients with tremor suppression and 10 patients without suppression. We also compared tremor spectral features between the two groups.Results: Patients with tremor suppression had higher CMC at tremor frequency during both rest tremor and postural tremor, and a higher postural tremor resetting index and stability when compared with patients without tremor suppression. Rest tremor frequency was similar between the two groups, but postural tremor frequency was lower in patients with tremor suppression as compared to patients without.Conclusion: M1 plays a major role in tremor suppression in PD, and the mechanisms of postural tremor may differ between patients with and without tremor suppression.

The Role of the Motor Cortex in Tremor Suppression in Parkinson's Disease / Leodori, Giorgio; De Bartolo, Maria Ilenia; Fabbrini, Andrea; Costanzo, Matteo; Mancuso, Marco; Belvisi, Daniele; Conte, Antonella; Fabbrini, Giovanni; Berardelli, Alfredo. - In: JOURNAL OF PARKINSON'S DISEASE. - ISSN 1877-7171. - 12:6(2022), pp. 1957-1963. [10.3233/JPD-223316]

The Role of the Motor Cortex in Tremor Suppression in Parkinson's Disease

Leodori, Giorgio
Primo
;
De Bartolo, Maria Ilenia;Fabbrini, Andrea;Costanzo, Matteo;Mancuso, Marco;Belvisi, Daniele;Conte, Antonella;Fabbrini, Giovanni;Berardelli, Alfredo
2022

Abstract

Background: Patients with Parkinson's disease (PD) and rest tremor may also have tremor during posture holding, with tremor being transiently suppressed during the transition between resting and posture holding. Other PD patients show no tremor suppression between resting and posture holding. The mechanisms responsible for tremor suppression in PD are unknown. Understanding the mechanisms of tremor suppression would expand our knowledge of tremor pathophysiology in PD.Objective: To investigate whether tremor suppression reflects the activity of the primary motor cortex (M1) and assess whether tremor features are different in patients with and without tremor suppression.Methods: We compared corticomuscular coherence (CMC) at tremor frequency and transcranial magnetic stimulation tremor resetting between 10 PD patients with tremor suppression and 10 patients without suppression. We also compared tremor spectral features between the two groups.Results: Patients with tremor suppression had higher CMC at tremor frequency during both rest tremor and postural tremor, and a higher postural tremor resetting index and stability when compared with patients without tremor suppression. Rest tremor frequency was similar between the two groups, but postural tremor frequency was lower in patients with tremor suppression as compared to patients without.Conclusion: M1 plays a major role in tremor suppression in PD, and the mechanisms of postural tremor may differ between patients with and without tremor suppression.
2022
Parkinson’s disease; clinical neurophysiology; motor cortex; tremor; Humans; Posture; Transcranial Magnetic Stimulation; Tremor; Motor Cortex; Parkinson Disease
01 Pubblicazione su rivista::01a Articolo in rivista
The Role of the Motor Cortex in Tremor Suppression in Parkinson's Disease / Leodori, Giorgio; De Bartolo, Maria Ilenia; Fabbrini, Andrea; Costanzo, Matteo; Mancuso, Marco; Belvisi, Daniele; Conte, Antonella; Fabbrini, Giovanni; Berardelli, Alfredo. - In: JOURNAL OF PARKINSON'S DISEASE. - ISSN 1877-7171. - 12:6(2022), pp. 1957-1963. [10.3233/JPD-223316]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1660642
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