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Song Y, Zhang TJ, Li Y, Gao Y. Application of real-time shear wave elastography in the assessment of torsional cervical dystonia. Quant Imaging Med Surg 2019; 9:662-670. [PMID: 31143657 DOI: 10.21037/qims.2019.04.08] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background This study aimed to investigate the value of real-time shear wave elastography (SWE) in the assessment of torsional cervical dystonia (TCD). Methods Ninety healthy volunteers and 30 TCD patients were recruited, and elastography was performed at musculi sternocleidomastoideus (MSD) and musculi splenius capitis (MSC). Mean shear elastic modulus of right MSD and MSC in healthy controls and bilateral MSD and MSC in TCD patients was determined. The thickness of MSD and MSC of affected muscles was measured in TCD patients. Results In TCD patients, the mean shear elastic modulus of affected MSD and MSC was significantly higher than that of corresponding normal muscles (P<0.01) and that of controls (P<0.01). The diagnostic threshold was 24.9 kPa for MSD and 25.07 kPa for MSC (for MSD and MSC, the area under ROC was 0.979 and 0.979, with a sensitivity of 90% and 91.3%, and a specificity of 95.6% and 96.7%, respectively). The elastic modulus of neither affected nor normal MSD and MSC was significantly related to age and body mass index (P>0.05). The shear elastic modulus of affected MSD and MSC was positively related to the peak electromyography (r=0.83-0.73, P<0.01). The thickness of affected MSD and MSC was significantly thicker than that of corresponding normal muscles in TCD patients (P<0.01). Conclusions Real-time SWE can identify the difference in shear elastic modulus of MSD and MSC between the affected and normal side in TCD patients, indicating important diagnostic value in the assessment of muscular status for these patients.
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Affiliation(s)
- Ye Song
- Department of Ultrasonography, Zhoupu Hospital, Shanghai University of Medicine & Health Sciences, College of Medical Imaging, Shanghai 201318, China
| | - Tian-Jie Zhang
- Shanghai Huapukang Pediatric Clinic, Shanghai 310105, China
| | - Yuan Li
- Department of Ultrasonography, Zhoupu Hospital, Shanghai University of Medicine & Health Sciences, College of Medical Imaging, Shanghai 201318, China
| | - Yuan Gao
- Department of Surgery, Tongji Hospital of Tongji University, Shanghai 200065, China
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Movimenti anomali secondari (distonie, mioclonie, tremori, discinesie). Neurologia 2012. [DOI: 10.1016/s1634-7072(12)62644-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Viallet F, Vercueil L, Gayraud D, Bonnefoi B, Renie L. Mouvements anormaux secondaires (dystonies, myoclonies, tremblements, dyskinésies). ACTA ACUST UNITED AC 2012. [DOI: 10.1016/s0246-0378(12)57571-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jang SJ, Choi JY, Sung DH, Park KH, Lee JY, Cho SK, Yu J, Lee KH, Kim BT. Comparison between (18)F-FDG PET/CT and EMG Mapping for Identifying Dystonic Superficial Muscles in Primary Cervical Dystonia: Preliminary Results. Nucl Med Mol Imaging 2010; 44:33-8. [PMID: 24899935 DOI: 10.1007/s13139-009-0004-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2009] [Revised: 11/04/2009] [Accepted: 12/01/2009] [Indexed: 11/29/2022] Open
Abstract
PURPOSE This study was conducted to compare (18)F-FDG PET/CT and electromyography (EMG) mapping in patients with primary cervical dystonia (PCD) to find dystonic superficial cervical muscles. METHODS Ten consecutive patients with PCD (M:F = 5:5, age 44 ± 13 years) whose dystonic posture was not relieved with conventional muscle relaxant therapy were included. Target cervical muscles for the comparison between (18)F-FDG PET/CT and EMG mapping were four representative superficial bilateral cervical muscles: splenius capitis muscle, sternocleidomstoid muscle, upper trapezius muscle, and leavator scapulae muscle. The diagnostic efficacy was compared between (18)F-FDG PET/CT and EMG mapping using physical exam and measurement of rotation angle as the gold standard. RESULTS Among 80 muscles evaluated, there were 21 (26%) dystonic superficial cervical muscles assessed with physical exam and motion analysis. The sensitivity, specificity, and accuracy for localizing dystonic muscles were 76, 92, and 88% for (18)F-FDG PET/CT, and 95, 66, and 74% for EMG mapping, respectively. The sensitivity of EMG mapping was significantly higher than that of (18)F-FDG PET/CT. In contrast, (18)F-FDG PET/CT was significantly superior to EMG mapping for specificity and accuracy. CONCLUSIONS (18)F-FDG PET/CT is more specific and accurate than EMG mapping for finding superficial dystonic cervical muscles. The high sensitivity of EMG mapping suggests that (18)F-FDG PET/CT and EMG mapping are complementary for finding dystonic superficial cervical muscles.
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Affiliation(s)
- Su Jin Jang
- Department of Nuclear Medicine, Seoul National University Hospital, Seoul National University School of Medicine, Seoul, Korea
| | - Joon Young Choi
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkawn University School of Medicine, #50 Ilwon-dong, Gangnam-gu, Seoul, 135-710 Korea
| | - Duk Hyun Sung
- Department of Physical Medicine and Rehabilitation, Samsung Medical Center, Sungkyunkawn University School of Medicine, Seoul, Korea
| | - Kwang Hong Park
- Department of Physical Medicine and Rehabilitation, Samsung Medical Center, Sungkyunkawn University School of Medicine, Seoul, Korea
| | - Ji Young Lee
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkawn University School of Medicine, #50 Ilwon-dong, Gangnam-gu, Seoul, 135-710 Korea
| | - Sook Kyung Cho
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkawn University School of Medicine, #50 Ilwon-dong, Gangnam-gu, Seoul, 135-710 Korea
| | - Jang Yu
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkawn University School of Medicine, #50 Ilwon-dong, Gangnam-gu, Seoul, 135-710 Korea
| | - Kyung-Han Lee
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkawn University School of Medicine, #50 Ilwon-dong, Gangnam-gu, Seoul, 135-710 Korea
| | - Byung-Tae Kim
- Department of Nuclear Medicine, Samsung Medical Center, Sungkyunkawn University School of Medicine, #50 Ilwon-dong, Gangnam-gu, Seoul, 135-710 Korea
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Polymyography in the diagnosis of childhood onset movement disorders. Eur J Paediatr Neurol 2008; 12:480-3. [PMID: 18282774 DOI: 10.1016/j.ejpn.2007.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2007] [Revised: 12/18/2007] [Accepted: 12/25/2007] [Indexed: 11/21/2022]
Abstract
UNLABELLED We report on the results of a clinical and polymyographic retrospective study of 61 paediatric patients with tremor, dystonia and/or myoclonus. Aim of the study was to verify the contribution of polymyography in the classification of these movement disorders and in their aetiological definition. METHODS The movement disorders were clinically classified by two experts, based on clinical and videotape recordings evaluation; all patients underwent standardized polymyographic evaluation; aetiological diagnosis was performed according to diagnostic protocols for dystonia, myoclonus, tremor and psychogenic movement disorders. The polymyographic features were summarized in five different patterns (dystonia, subcortical myoclonus, myoclonic dystonia, tremor, normal) and compared with the clinical classification and with aetiological diagnosis. RESULTS In more than 70% of the patients the polymyographic features were in accordance with the clinical classification; in 31% the polymyographic features allowed to identify a clinically unclassified movement disorder and in 19.6% disclosed a not clinically evident associated movement disorder. The polymyographic study did not contribute to the aetiological diagnosis, but was useful in supporting the clinical diagnosis of psychogenic movement disorder.
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Farshadmanesh F, Chang P, Wang H, Yan X, Corneil BD, Crawford JD. Neck muscle synergies during stimulation and inactivation of the interstitial nucleus of Cajal (INC). J Neurophysiol 2008; 100:1677-85. [PMID: 18579660 DOI: 10.1152/jn.90363.2008] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The interstitial nucleus of Cajal (INC) is thought to control torsional and vertical head posture. Unilateral microstimulation of the INC evokes torsional head rotation to positions that are maintained until stimulation offset. Unilateral INC inactivation evokes head position-holding deficits with the head tilted in the opposite direction. However, the underlying muscle synergies for these opposite behavioral effects are unknown. Here, we examined neck muscle activity in head-unrestrained monkeys before and during stimulation (50 muA, 200 ms, 300 Hz) and inactivation (injection of 0.3 mul of 0.05% muscimol) of the same INC sites. Three-dimensional eye and head movements were recorded simultaneously with electromyographic (EMG) activity in six bilateral neck muscles: sternocleidomastoid (SCM), splenius capitis (SP), rectus capitis posterior major (RCPmaj.), occipital capitis inferior (OCI), complexus (COM), and biventer cervicis (BC). INC stimulation evoked a phasic, short-latency ( approximately 5-10 ms) facilitation and later ( approximately 100-200 ms) a more tonic facilitation in the activity of ipsi-SCM, ipsi-SP, ipsi-COM, ipsi-BC, contra-RCPmaj., and contra-OCI. Unilateral INC inactivation led to an increase in the activity of contra-SCM, ipsi-SP, ipsi-RCPmaj., and ipsi-OCI and a decrease in the activity of contra-RCPmaj. and contra-OCI. Thus the influence of INC stimulation and inactivation were opposite on some muscles (i.e., contra-OCI and contra-RCPmaj.), but the comparative influences on other neck muscles were more variable. These results show that the relationship between the neck muscle responses during INC stimulation and inactivation is much more complex than the relationship between the overt behaviors.
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Affiliation(s)
- Farshad Farshadmanesh
- York Center for Vision Research, Canadian Institutes of Health Research Group for Action and Perception, Departments of Psychology, Biology, and Kinesiology and Health Sciences, York University, Toronto, Ontario, Canada
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Syndrome CANOMAD au cours d'une maladie de Waldenström. Rev Med Interne 2006. [DOI: 10.1016/j.revmed.2006.10.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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