Objective: To investigate the possible correlations between clinico-radiological features and pathophysiological mechanisms in patients with dystonia secondary to focal brain lesions. Methods: Single and paired-pulse transcranial magnetic stimulation was used to assess corticospinal excitability in 10 patients (4 females; mean age 61) and a group of normal controls. Active threshold, latency and amplitude of motor evoked potentials (MEPs), silent period (SP) duration and short-interval intracortical inhibition (SICI) were evaluated. Results: Patients with lesions involving the putamen and caudate presented with dystonic postures at rest. TMS assessment in these subjects showed increased MEP amplitude on the affected side and a bilateral decrease of SP duration and SICI. When the lesion spared the putamen and caudate, mainly involving the thalamus, the clinical picture was dominated by slow repetitive involuntary movements and tremor. In the affected side of these subjects the MEP amplitude was reduced and the MEP threshold was increased. Conclusions: When putamen and caudate were lesioned, the patients presented with dystonic postures at rest; furthermore the patients showed changes of corticospinal excitability in comparison to both healthy subjects and other dystonic patients. Significance: There are correlations between type of dystonia, site of the lesion and neurophysiological findings

Corticospinal excitability in patients with secondary dystonia due to focal lesions of the basal ganglia and thalamus.

TROMPETTO, CARLO;AVANZINO, LAURA;MARINELLI, LUCIO;MORI, LAURA;PELOSIN, ELISA;ROCCATAGLIATA, LUCA;ABBRUZZESE, GIOVANNI
2012-01-01

Abstract

Objective: To investigate the possible correlations between clinico-radiological features and pathophysiological mechanisms in patients with dystonia secondary to focal brain lesions. Methods: Single and paired-pulse transcranial magnetic stimulation was used to assess corticospinal excitability in 10 patients (4 females; mean age 61) and a group of normal controls. Active threshold, latency and amplitude of motor evoked potentials (MEPs), silent period (SP) duration and short-interval intracortical inhibition (SICI) were evaluated. Results: Patients with lesions involving the putamen and caudate presented with dystonic postures at rest. TMS assessment in these subjects showed increased MEP amplitude on the affected side and a bilateral decrease of SP duration and SICI. When the lesion spared the putamen and caudate, mainly involving the thalamus, the clinical picture was dominated by slow repetitive involuntary movements and tremor. In the affected side of these subjects the MEP amplitude was reduced and the MEP threshold was increased. Conclusions: When putamen and caudate were lesioned, the patients presented with dystonic postures at rest; furthermore the patients showed changes of corticospinal excitability in comparison to both healthy subjects and other dystonic patients. Significance: There are correlations between type of dystonia, site of the lesion and neurophysiological findings
File in questo prodotto:
File Dimensione Formato  
Trompetto 2012 Corticospinal excitability in patients with secondary dystonia due to focal lesions of the basal ganglia and thalamus.pdf

accesso chiuso

Descrizione: ARTICOLO PRINCIPALE
Tipologia: Documento in versione editoriale
Dimensione 404.14 kB
Formato Adobe PDF
404.14 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
21945153.pdf

accesso aperto

Descrizione: green open access full text
Tipologia: Documento in Post-print
Dimensione 523.6 kB
Formato Adobe PDF
523.6 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/284187
Citazioni
  • ???jsp.display-item.citation.pmc??? 16
  • Scopus 38
  • ???jsp.display-item.citation.isi??? 34
social impact