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Abnormal tactile temporal discrimination in psychogenic dystonia.
Morgante, F; Tinazzi, M; Squintani, G; Martino, D; Defazio, G; Romito, L; Albanese, A; Di Matteo, A; Quartarone, A; Girlanda, P; Fiorio, M; Berardelli, A.
Afiliación
  • Morgante F; Dipartimento di Neuroscienze, Scienze Psichiatriche ed Anestesiologiche, Università di Messina, AOU G. Martino, Via Consolare Valeria 1, 98125 Messina, Italy. fmorgante@gmail.com
Neurology ; 77(12): 1191-7, 2011 Sep 20.
Article en En | MEDLINE | ID: mdl-21900627
ABSTRACT

OBJECTIVE:

Neurophysiologic studies demonstrated that patients with primary torsion dystonia (PTD) and with psychogenic dystonia (Psy-D) share similar abnormalities in the motor system. In this study, we evaluated somatosensory function in Psy-D by testing temporal discrimination threshold (TDT), and compared the results with those obtained in patients with PTD.

METHODS:

TDT of tactile stimuli was assessed in 10 patients with Psy-D, 10 patients with PTD, and 16 control subjects. The 2 groups of patients were matched for age, gender, disease duration, and distribution of dystonia. Tactile stimuli consisted of pairs of non-noxious electrical shocks delivered to the right or left hand at interstimulus interval increasing from 0 to 400 msec, in 10-msec steps. TDT was defined as the value at which subjects recognized the 2 stimuli as asynchronous.

RESULTS:

TDT was higher in Psy-D and PTD compared to control subjects, for both the right and the left hand. In a subgroup of patients with unilateral dystonia (Psy-D = 4, PTD = 5), TDT did not differ between the affected and the unaffected side in both groups of patients. Disease duration was not correlated to the increased TDT value.

CONCLUSIONS:

Our study suggests an impaired processing of somatosensory inputs in both Psy-D and PTD. These abnormalities might represent a neurophysiological trait predisposing to develop a dystonic posture triggered by psychiatric and psychological factors.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Umbral Sensorial / Percepción del Tiempo / Tacto / Trastornos Distónicos / Discriminación en Psicología Tipo de estudio: Clinical_trials / Diagnostic_studies / Prognostic_studies Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: Neurology Año: 2011 Tipo del documento: Article País de afiliación: Italia

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Umbral Sensorial / Percepción del Tiempo / Tacto / Trastornos Distónicos / Discriminación en Psicología Tipo de estudio: Clinical_trials / Diagnostic_studies / Prognostic_studies Límite: Adult / Female / Humans / Male / Middle aged Idioma: En Revista: Neurology Año: 2011 Tipo del documento: Article País de afiliación: Italia