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Martino D. What can epidemiological studies teach on the pathophysiology of adult-onset isolated dystonia? INTERNATIONAL REVIEW OF NEUROBIOLOGY 2023; 169:21-60. [PMID: 37482393 DOI: 10.1016/bs.irn.2023.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Several demographic and environmental factors may play an important role in determining the risk of developing adult-onset isolated dystonia (AOID) and/or modifying its course. However, epidemiologic studies have provided to date only partial insight on the disease mechanisms that are actively influenced by these factors. The age-related increase in female predominance in both patients diagnosed with AOID and subjects carrying its putative mediational phenotype suggests sexual dimorphism that has been demonstrated for mechanisms related to blepharospasm and cervical dystonia. The opposite relationship that spread and spontaneous remission of AOID have with age suggests age-related decline of compensatory mechanisms that protect from the progression of AOID. Epidemiological studies focusing on environmental risk factors yielded associations only with specific forms of AOID, even for those factors that are not likely to predispose exclusively to specific focal forms (for example, only writing dystonia was found associated with head trauma, and only blepharospasm with coffee intake). Other factors show biological plausibility of their mechanistic role for specific forms, e.g., dry eye syndrome or sunlight exposure for blepharospasm, scoliosis for cervical dystonia, repetitive writing for writing dystonia. Overall, the relationship between environment and AOID remains complex and incompletely defined. Both hypothesis-driven preclinical studies and well-designed cross-sectional or prospective clinical studies are still necessary to decipher this intricate relationship.
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Affiliation(s)
- Davide Martino
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Health Sciences Centre, Hospital Drive NW, Calgary, AB, Canada; The Hotchkiss Brain Institute, and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada.
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Spano VE, Imbriglio TV, Ho KCJ, Chow JCF, Cioffi I. Increased somatosensory amplification is associated with decreased pressure pain thresholds at both trigeminal and extra-trigeminal locations in healthy individuals. J Oral Rehabil 2020; 48:10-17. [PMID: 32979854 DOI: 10.1111/joor.13101] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/17/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND The diagnosis of temporomandibular disorders (TMD) is based on patient history and physical examination, and may require medical imaging. Masticatory muscle palpation is essential to make a diagnosis of TMD. However, the response of masticatory muscles to mechanical pressure stimuli depends on many physical and psychological factors. OBJECTIVE This study aimed at determining the impact of somatosensory amplification (SSA)-an estimate of somatic awareness and bodily hypervigilance-on pressure pain thresholds (PPTs) measured at both trigeminal and extra-trigeminal locations in healthy individuals. METHODS PPTs were measured at the right anterior temporalis and superficial masseter, and the thenar eminence of the right hand in one hundred healhty individuals (69F, 31M), divided in three groups based on their SSA scores: low (N = 32), intermediate (N = 34) and high (N = 34). General linear models were used to test between-group differences in PPTs including sex as a covariate. The level of significance was set at P < .05. RESULTS Individuals with high SSA had lower PPTs at the anterior temporalis than individuals with low (P = .006) and intermediate (P = .001) SSA. No significant between-group differences were found in PPTs measured at the masseter (P = .372). PPTs measured at the thenar eminence were significantly lower in the high than the low SSA group (P = .009). Females had lower PPTs at the masseter than males (P = .021) but not at other muscle locations (all P > .05). CONCLUSION Increased somatosensory amplification is associated with decreased pressure pain thresholds at both trigeminal and extra-trigeminal locations in healthy individuals. SSA could be a potential confounder while diagnosing TMD and evaluating treatment outcomes.
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Affiliation(s)
- Valerie E Spano
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada.,University of Toronto Centre for the Study of Pain, University of Toronto, Toronto, ON, Canada.,Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, Toronto, ON, Canada
| | - Tina V Imbriglio
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada.,University of Toronto Centre for the Study of Pain, University of Toronto, Toronto, ON, Canada.,Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, Toronto, ON, Canada
| | - Ka Chun Jeremy Ho
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada.,University of Toronto Centre for the Study of Pain, University of Toronto, Toronto, ON, Canada.,Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, Toronto, ON, Canada
| | - Jeffrey C F Chow
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada.,University of Toronto Centre for the Study of Pain, University of Toronto, Toronto, ON, Canada.,Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, Toronto, ON, Canada
| | - Iacopo Cioffi
- Faculty of Dentistry, University of Toronto, Toronto, ON, Canada.,University of Toronto Centre for the Study of Pain, University of Toronto, Toronto, ON, Canada.,Centre for Multimodal Sensorimotor and Pain Research, University of Toronto, Toronto, ON, Canada.,Department of Dentistry, Mount Sinai Hospital, Toronto, ON, Canada
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Furokawa S, Kimoto S, Furuse N, Furuya Y, Ogawa T, Nakashima Y, Okubo M, Yamaguchi H, Kawai Y. The effects of silicone-based resilient denture liners on pain: A randomized controlled trial. J Prosthodont Res 2020; 64:417-423. [DOI: 10.1016/j.jpor.2019.11.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 11/05/2019] [Accepted: 11/18/2019] [Indexed: 11/16/2022]
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Malo-Urriés M, Estébanez-de-Miguel E, Bueno-Gracia E, Tricás-Moreno JM, Santos-Lasaosa S, Hidalgo-García C. Sensory function in headache: a comparative study among patients with cluster headache, migraine, tension-type headache, and asymptomatic subjects. Neurol Sci 2020; 41:2801-2810. [DOI: 10.1007/s10072-020-04384-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 03/28/2020] [Indexed: 10/24/2022]
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Malo-Urriés M, Hidalgo-García C, Estébanez-de-Miguel E, Tricás-Moreno JM, Santos-Lasaosa S, Jahanshahi M. Sensory function in cluster headache: an observational study comparing the symptomatic and asymptomatic sides. Neuropsychiatr Dis Treat 2018; 14:3363-3371. [PMID: 30573960 PMCID: PMC6292232 DOI: 10.2147/ndt.s186051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Based on inconsistent sensory alterations demonstrated in cluster headache (CH), the aim of this study was to determine whether patients with CH develop sensory changes in the symptomatic side compared to the asymptomatic side. METHODS Quantitative sensory testing (QST), including pressure pain threshold (PPT), tactile detection threshold (TDT), prick detection threshold (PDT), and two-point detection threshold (2PDT), was evaluated in 16 patients (seven women; age 41.9±6.8 years) with CH. Test sites included the first, second, and third divisions of the trigeminal nerve, cervical spine, and thenar eminence in the symptomatic and asymptomatic sides. RESULTS The symptomatic side, compared to the asymptomatic side, presented significantly decreased PPT in the first (P=0.011; 423.81±174.05 kPa vs 480.13±214.99 kPa) and second (P=0.023; 288.88±140.80 kPa vs 326.38±137.33 kPa) divisions of the trigeminal nerve, significantly increased TDT in the first (P=0.002; 2.44±0.40 vs 1.74±0.24) and second (P=0.016; 1.92±0.34 vs 1.67±0.09) divisions, and increased 2PDT in the first division (P=0.004; 18.13±4.70 mm vs 15.0±4.92 mm) and neck (P=0.007; 45.31±20.65 mm vs 38.44±16.10 mm). CONCLUSION These results support the prior evidence suggesting a specific pattern of alteration of sensory function with alterations in the symptomatic side compared to the asymptomatic side.
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Affiliation(s)
- Miguel Malo-Urriés
- Physiotherapy Research Unit, Department of Physiatry and Nursing, University of Zaragoza, Zaragoza, Spain,
| | - César Hidalgo-García
- Physiotherapy Research Unit, Department of Physiatry and Nursing, University of Zaragoza, Zaragoza, Spain,
| | - Elena Estébanez-de-Miguel
- Physiotherapy Research Unit, Department of Physiatry and Nursing, University of Zaragoza, Zaragoza, Spain,
| | - José Miguel Tricás-Moreno
- Physiotherapy Research Unit, Department of Physiatry and Nursing, University of Zaragoza, Zaragoza, Spain,
| | | | - Marjan Jahanshahi
- Cognitive Motor Neuroscience Group, Department of Clinical and Movement Neurosciences, University College London Queen Square Institute of Neurology, The National Hospital for Neurology and Neurosurgery, London, UK
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Abstract
Sensory decline is viewed as an inevitable consequence of the ageing process. However, reports of declines have not been a consistent finding across the sensory systems. Reports from psychophysical studies indicate that the most common declines with ageing are in vision and audition and, to a lesser degree, olfaction and gustation. Findings for the somatosensory system (mechanoreception, warming and cooling thermoreception and pain) are less conclusive. Factors that contribute to individual differences in sensory ratings beyond chronological ageing include stimulus factors including stimulus type and body location, response measures and instructions, systemic disease that may affect the peripheral or central nervous system and environmental factors that may affect the skin integrity.
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Affiliation(s)
- M W Heft
- Department of Oral & Maxillofacial Surgery and Claude D. Pepper Center on Oral Health in Aging, University of Florida, Gainesville, FL, USA
| | - M E Robinson
- Department of Clinical & Health Psychology, College of Public Health and Health Professions, University of Florida, Gainesville, FL, USA
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