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Electrophysiological and structural MRI correlates of dystonic head rotation in drug-naïve patients with torticollis
- Source :
- Parkinsonism & related disorders 21 (2015): 1415–1420. doi:10.1016/j.parkreldis.2015.09.050, info:cnr-pdr/source/autori:Bono, Francesco; Salvino, Dania; Cerasa, Antonio; Vescio, Basilio; Nigro, Salvatore; Quattrone, Aldo/titolo:Electrophysiological and structural MRI correlates of dystonic head rotation in drug-naive patients with torticollis/doi:10.1016%2Fj.parkreldis.2015.09.050/rivista:Parkinsonism & related disorders/anno:2015/pagina_da:1415/pagina_a:1420/intervallo_pagine:1415–1420/volume:21
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- Introduction We tested whether a change in head/neck position initiates head deviation in drug-naive patients with cervical dystonia and to identify the electrophysiological and neuroanatomical correlates of dystonic head rotation. Methods Twenty-five consecutive drug-naive patients with cervical dystonia and 25 healthy controls underwent the simultaneous surface electromyographic (EMG) recording of sternocleidomastoid (SCM) muscle contractions during head/neck position changes, blink reflex recovery cycle (BRrc), DAT-SPECT, and advanced structural neuroimaging analysis using voxel-based morphometry (VBM). Results Surface EMG recordings of SCM muscle activity during changes in head/neck position demonstrated an insignificant asymmetric low amplitude of the SCM muscle contractions in the horizontal position in both patients and controls, but an asymmetric high amplitude in SCM muscle contractions leading to abnormal head movements in vertical positions in patients with cervical dystonia. All controls had a symmetric low increase in amplitude of SCM muscle contractions in response to changes in head/neck position. VBM analysis in 19 patients showed abnormal decreases of gray matter (GM) volume in the bilateral motor (localized in the homunculus of the head) and premotor cortices when compared to controls. In addition, the side of these neuroanatomical changes was asymmetrically related to abnormal head deviations in these patients. All subjects had normal results during BRrc and DAT-SPECT. Conclusions The passage from inactive horizontal position to active vertical head/neck posture initiates head deviation in drug-naive patients with cervical dystonia, and the anatomical correlates of this dystonic head rotation is a restricted abnormal pattern of GM changes in the motor cortices.
- Subjects :
- Adult
Male
Dynamic dystonic disorder
Rotation
Posture
Neuroimaging
Electromyography
Neck Muscles
mental disorders
medicine
Humans
Cervical dystonia
Corneal reflex
Gray Matter
Torticollis
Tomography, Emission-Computed, Single-Photon
Dopamine Plasma Membrane Transport Proteins
Blinking
Reflex, Abnormal
medicine.diagnostic_test
business.industry
Motor Cortex
Magnetic resonance imaging
Anatomy
Middle Aged
medicine.disease
Magnetic Resonance Imaging
Electrophysiology
medicine.anatomical_structure
Neurology
Case-Control Studies
Head Movements
Isolated cervical dystonia
Female
sense organs
Neurology (clinical)
Geriatrics and Gerontology
medicine.symptom
business
Muscle Contraction
Muscle contraction
Motor cortex
Subjects
Details
- ISSN :
- 13538020
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- Parkinsonism & Related Disorders
- Accession number :
- edsair.doi.dedup.....376e4ff0db525db1f6b76661ffbabe98