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Guekos A, Saxer J, Salinas Gallegos D, Schweinhardt P. Healthy women show more experimentally induced central sensitization compared with men. Pain 2024; 165:1413-1424. [PMID: 38231588 PMCID: PMC11090033 DOI: 10.1097/j.pain.0000000000003144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/14/2023] [Accepted: 10/13/2023] [Indexed: 01/18/2024]
Abstract
ABSTRACT Women more often experience chronic pain conditions than men. Central sensitization (CS) is one key mechanism in chronic pain that can differ between the sexes. It is unknown whether CS processes are already more pronounced in healthy women than in men. In 66 subjects (33 women), a thermal CS induction protocol was applied to the dorsum of one foot and a sham protocol to the other. Spatial extent [cm 2 ] of secondary mechanical hyperalgesia (SMH) and dynamic mechanical allodynia were assessed as subjective CS proxy measures, relying on verbal feedback. Changes in nociceptive withdrawal reflex magnitude (NWR-M) and response rate (NWR-RR) recorded through surface electromyography at the biceps and rectus femoris muscles were used as objective CS proxies. The effect of the CS induction protocol on SMH was higher in women than in men (effect size 2.11 vs 1.68). Nociceptive withdrawal reflex magnitude results were statistically meaningful for women (effect size 0.31-0.36) but not for men (effect size 0.12-0.29). Differences between men and women were not meaningful. Nociceptive withdrawal reflex response rate at the rectus femoris increased in women after CS induction and was statistically different from NWR-RR in men (median differences of 13.7 and 8.4% for 120 and 140% reflex threshold current). The objective CS proxy differences indicate that dorsal horn CS processes are more pronounced in healthy women. The even larger sex differences in subjective CS proxies potentially reflect greater supraspinal influence in women. This study shows that sex differences are present in experimentally induced CS in healthy subjects, which might contribute to women's vulnerability for chronic pain.
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Affiliation(s)
- Alexandros Guekos
- Integrative Spinal Research, Department of Chiropractic Medicine, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Decision Neuroscience Lab, Department of Health Sciences and Technology, Institute of Human Movement Sciences and Sport, ETH Zurich, Zurich, Switzerland
| | - Janis Saxer
- Integrative Spinal Research, Department of Chiropractic Medicine, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Diego Salinas Gallegos
- Integrative Spinal Research, Department of Chiropractic Medicine, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
- IQVIA AG, Rotkreuz, Switzerland
| | - Petra Schweinhardt
- Integrative Spinal Research, Department of Chiropractic Medicine, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
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Shembel AC, Morrison RA, Fetzer DT, Patterson-Lachowicz A, McDowell S, Comstock Smeltzer JC, Mau T. Extrinsic Laryngeal Muscle Tension in Primary Muscle Tension Dysphonia with Shear Wave Elastography. Laryngoscope 2023; 133:3482-3491. [PMID: 37334857 PMCID: PMC10728340 DOI: 10.1002/lary.30830] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 05/09/2023] [Accepted: 05/30/2023] [Indexed: 06/21/2023]
Abstract
OBJECTIVES It has been assumed that patients with primary muscle tension dysphonia (pMTD) have more extrinsic laryngeal muscle (ELM) tension, but tools to study this phenomenon lack. Shear wave elastography (SWE) is a potential method to address these shortcomings. The objectives of this study were to apply SWE to the ELMs, compare SWE measures to standard clinical metrics, and determine group differences in pMTD and typical voice users before and after vocal load. METHODS SWE measurements of the ELMs from ultrasound examinations of the anterior neck, supraglottic compression severities from laryngoscopic images, cepstral peak prominences (CPP) from voice recordings, and self-perceptual ratings of vocal effort and discomfort were obtained in voice users with (N = 30) and without (N = 35) pMTD, before and after a vocal load challenge. RESULTS ELM tension significantly increased from rest-to-voiced conditions in both groups. However, the groups were similar in their ELM stiffness levels at SWE at baseline, during vocalization, and post-vocal load. Levels of vocal effort and discomfort and supraglottic compression were significantly higher and CPP was significantly lower in the pMTD group. Vocal load had a significant effect on vocal effort and discomfort but not on laryngeal or acoustic patterns. CONCLUSION SWE can be used to quantify ELM tension with voicing. Although the pMTD group reported significantly higher levels of vocal effort and vocal tract discomfort and, on average, exhibited significantly more severe supraglottic compression and lower CPP values, there were no group differences in levels of ELM tension using SWE. LEVEL OF EVIDENCE 2 Laryngoscope, 133:3482-3491, 2023.
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Affiliation(s)
- Adrianna C. Shembel
- Department of Otolaryngology-Head and Neck, Voice Center, University of Texas Southwestern Medical Center, Dallas, TX, United States
- School of Behavioral and Brain Sciences, Department of Speech, Language, and Hearing, University of Texas at Dallas, Richardson, TX, United States
| | - Robert A. Morrison
- School of Behavioral and Brain Sciences, Department of Speech, Language, and Hearing, University of Texas at Dallas, Richardson, TX, United States
| | - David T. Fetzer
- Department of Radiology, CACTUS Lab, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Amber Patterson-Lachowicz
- Department of Radiology, CACTUS Lab, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Sarah McDowell
- School of Behavioral and Brain Sciences, Department of Speech, Language, and Hearing, University of Texas at Dallas, Richardson, TX, United States
| | - Julianna C. Comstock Smeltzer
- School of Behavioral and Brain Sciences, Department of Speech, Language, and Hearing, University of Texas at Dallas, Richardson, TX, United States
| | - Ted Mau
- Department of Otolaryngology-Head and Neck, Voice Center, University of Texas Southwestern Medical Center, Dallas, TX, United States
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Jo D, Goubran M, Bilodeau M. Sex differences in central and peripheral fatigue induced by sustained isometric ankle plantar flexion. J Electromyogr Kinesiol 2022; 65:102676. [DOI: 10.1016/j.jelekin.2022.102676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 05/16/2022] [Accepted: 06/01/2022] [Indexed: 10/18/2022] Open
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Tsuchiya Y, Hirata N, Asama T, Osakabe N, Hirata K, Akagi R. Can a Short-term Daily Oral Administration of Propolis Improve Muscle Fatigue and Recovery? Int J Sports Med 2022; 43:859-864. [PMID: 35640598 DOI: 10.1055/a-1808-6319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This study investigated the effect of 1-week oral administration of propolis on muscle fatigue and recovery after performing a fatigue task (total 100 maximal voluntary concentric knee extension repetitions). In this placebo-controlled, double-blind study, 18 young men consumed a formulation with high Brazilian green propolis dose (H-BGP), a formulation with low Brazilian green propolis dose, or a placebo, for 1 week before performing the fatigue task (an interval between each intervention: 1-2 weeks). Maximal voluntary contraction torque, central fatigue (voluntary activation and root mean square values of the surface electromyography amplitude), and peripheral fatigue (potentiated triplet torque) were assessed before, immediately after, and 2 minutes after the fatigue task. Maximal voluntary contraction torque decreased immediately after the fatigue task in all conditions (P<0.001); however, it recovered from immediately after to 2 minutes after the fatigue task only in the H-BGP condition (P<0.001). Furthermore, there was a significant decrease in voluntary activation (P<0.001) and root mean square values of the surface electromyography amplitude (P≤0.035) only in the placebo condition. No significant difference was observed in the time-course change in potentiated triplet torque between the conditions. These results suggest that oral administration of propolis promotes muscle fatigue recovery by reducing central fatigue.
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Affiliation(s)
- Yuma Tsuchiya
- Graduate School of Engineering and Science, Shibaura Institute of Technology, Saitama-shi, Japan
| | - Naoya Hirata
- Graduate School of Engineering and Science, Shibaura Institute of Technology, Saitama-shi, Japan
| | - Takashi Asama
- Institute for Bee Products and Health Science, R&D department, Yamada Bee Company Inc, Kagamino-cho, Japan
| | - Naomi Osakabe
- College of Systems Engineering and Science, Shibaura Institute of Technology, Saitama-shi, Japan
| | - Kosuke Hirata
- Faculty of Sport Sciences, Waseda University, Tokorozawa-shi, Japan
| | - Ryota Akagi
- College of Systems Engineering and Science, Shibaura Institute of Technology, Saitama-shi, Japan
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Trade-Off Between Maximal Power Output and Fatigue Resistance of the Knee Extensors for Older Men. J Aging Phys Act 2022; 30:1003-1013. [PMID: 35453123 DOI: 10.1123/japa.2021-0384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 02/15/2022] [Accepted: 02/22/2022] [Indexed: 11/18/2022]
Abstract
This study investigated associations of fatigue resistance determined by an exercise-induced decrease in neuromuscular power with prefatigue neuromuscular strength and power of the knee extensors in 31 older men (65-88 years). A fatigue task consisted of 50 consecutive maximal effort isotonic knee extensions (resistance: 20% of prefatigue isometric maximal voluntary contraction torque) over a 70° range of motion. The average of the peak power values calculated from the 46th to 50th contractions during the fatigue task was normalized to the prefatigue peak power value, which was defined as neuromuscular fatigue resistance. Neuromuscular fatigue resistance was negatively associated with prefatigue maximal power output (r = -.530) but not with prefatigue maximal voluntary contraction torque (r = -.252). This result highlights a trade-off between prefatigue maximal power output and neuromuscular fatigue resistance, implying that an improvement in maximal power output might have a negative impact on neuromuscular fatigue resistance.
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Chalchat E, Gennisson JL, Peñailillo L, Oger M, Malgoyre A, Charlot K, Bourrilhon C, Siracusa J, Garcia-Vicencio S. Changes in the Viscoelastic Properties of the Vastus Lateralis Muscle With Fatigue. Front Physiol 2020; 11:307. [PMID: 32390859 PMCID: PMC7194212 DOI: 10.3389/fphys.2020.00307] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 03/19/2020] [Indexed: 12/31/2022] Open
Abstract
We investigated the in vivo effects of voluntary fatiguing isometric contractions of the knee extensor muscles on the viscoelastic properties of the vastus lateralis (VL). Twelve young males (29.0 ± 4.5 years) performed an intermittent voluntary fatigue protocol consisting of 6 sets × 10 repetitions of 5-s voluntary maximal isometric contractions with 5-s passive recovery periods between repetitions. Voluntary and evoked torque were assessed before, immediately after, and 20 min after exercise. The shear modulus (μ) of the VL muscle was estimated at rest and during a ramped isometric contraction using a conventional elastography technique. An index of active muscle stiffness was then calculated (slope from the relationship between shear modulus and absolute torque). Resting muscle viscosity (η) was quantified using a shear-wave spectroscopy sequence to measure the shear-wave dispersion. Voluntary and evoked torque decreased by ∼37% (P < 0.01) immediately after exercise. The resting VL μ was lower at the end of the fatigue protocol (-57.9 ± 5.4%, P < 0.001), whereas the resting VL η increased (179.0 ± 123%, P < 0.01). The active muscle stiffness index also decreased with fatigue (P < 0.05). By 20 min post-fatigue, there were no significant differences from the pre-exercise values for VL η and the active muscle stiffness index, contrary to the resting VL μ. We show that the VL μ is greatly reduced and η greatly enhanced by fatigue, reflecting a more compliant and viscous muscle. The quantification of both shear μ and η moduli in vivo may contribute to a better understanding of the mechanical behavior of muscles during fatigue in sports medicine, as well as in clinical situations.
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Affiliation(s)
- Emeric Chalchat
- Unité de Physiologie de l'Exercice et des Activités en Conditions Extrêmes, Département Environnements Opérationnels, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France
| | - Jean-Luc Gennisson
- BIOMAPS, Laboratoire d'Imagerie Biomédicale Multi-Modale, CEA, Université Paris-Saclay, CNRS UMR 9011, INSERM UMR 1281, Orsay, France
| | - Luis Peñailillo
- Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Finis Terrae University, Santiago, Chile
| | - Myriam Oger
- Unité Imagerie, Département des Plateformes et Recherche Technologique, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France
| | - Alexandra Malgoyre
- Unité de Physiologie de l'Exercice et des Activités en Conditions Extrêmes, Département Environnements Opérationnels, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France.,LBEPS, Univ Evry, IRBA, Université Paris Saclay, Evry, France
| | - Keyne Charlot
- Unité de Physiologie de l'Exercice et des Activités en Conditions Extrêmes, Département Environnements Opérationnels, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France.,LBEPS, Univ Evry, IRBA, Université Paris Saclay, Evry, France
| | - Cyprien Bourrilhon
- Unité de Physiologie de l'Exercice et des Activités en Conditions Extrêmes, Département Environnements Opérationnels, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France.,LBEPS, Univ Evry, IRBA, Université Paris Saclay, Evry, France
| | - Julien Siracusa
- Unité de Physiologie de l'Exercice et des Activités en Conditions Extrêmes, Département Environnements Opérationnels, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France.,LBEPS, Univ Evry, IRBA, Université Paris Saclay, Evry, France
| | - Sebastian Garcia-Vicencio
- Unité de Physiologie de l'Exercice et des Activités en Conditions Extrêmes, Département Environnements Opérationnels, Institut de Recherche Biomédicale des Armées, Brétigny-sur-Orge, France.,LBEPS, Univ Evry, IRBA, Université Paris Saclay, Evry, France
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