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Jaques LA, Stermer PRR, de Oliveira AKB, Marães VRFDS, Jácomo RH, Alves AT, Cunha KDC, da Silva ML. Autonomic modulation of heart rate during physical activity in pregnant women: A systematic review of literature. Pacing Clin Electrophysiol 2024; 47:802-814. [PMID: 38577940 DOI: 10.1111/pace.14976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 03/05/2024] [Accepted: 03/16/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND There are important physiological changes in the heart rate autonomic modulation in pregnant women and these changes may affect the way their bodies respond to exercise stimulus. The objective of this review is to verify the physical exercise influence on autonomic modulation of heart rate in pregnant women. METHODS This study is a Systematic Review. The electronic databases used to search for the studies were Cochrane Library, MEDLINE via PUBMED, Regional Health Portal and EMBASE. Experimental studies that evaluated heart-rate variability in pregnant women practicing physical exercises were included. And articles that addressed only fetal heart-rate variability, case reports, congress abstracts, clinical trial protocols without results, preprints, and gray literature were excluded. There were no language or publication year restrictions. The descriptors used in the Search were Cardiac Chronotropism, Sympathetic Nervous System, Pregnancy, and Physical Exercise. For statistical analysis, the fixed effect model was used. RESULTS A total of 3106 articles were found, and 12 studies were included, which 5 were nonrandomized clinical trials, 4 were randomized clinical trials, and 3 were cross-sectional studies. Three hundred and four pregnant women were included in the studies. The application of physical exercise was varied, but in general they used aerobic exercises and with increased variability of the heart rate and reflex on the autonomic modulation of heart rate. CONCLUSION Most studies demonstrate benefits heart rate in pregnant women, but limited research makes it hard to compare specific types of exercise and larger studies are needed to identify the best exercise.
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Affiliation(s)
- Lucas Alves Jaques
- Center of Biological and Health Sciences, State University of Pará, Marabá, Pará State, Brazil
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Hansen K, Curran T, O'Neill JA, Reynolds L, Gauvreau K, Gauthier N. Flexibility: A Hidden But Trainable Morbidity in Pediatric Patients with Congenital Heart Disease. Pediatr Cardiol 2023; 44:1599-1604. [PMID: 37432410 DOI: 10.1007/s00246-023-03228-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 07/02/2023] [Indexed: 07/12/2023]
Abstract
Flexibility is important for range of motion, muscular performance, and injury prevention with exercise. Promoting exercise is important for patients with congenital and pediatric acquired heart disease (CHD), yet there are a paucity of data addressing flexibility in this population. We hypothesized that flexibility was worse in pediatric patients with CHD than the general population but could be improved with directed training. Patients at Boston Children's Hospital who participated in the pediatric Cardiac Fitness Program between 09/2016 and 11/2022 were retrospectively analyzed. Flexibility was assessed via sit-and-reach (SaR) box. Data from baseline and 60 days into the fitness program intervention were compared to age-matched population norms, and changes over time were assessed. Analyses were also stratified by sex and history of sternotomy. Patients with paired baseline and 60-day data were analyzed (n = 46, age 8-23 years old, 52% male). The mean SaR at baseline for CHD patients was 24.3 cm, significantly lower than the population norm (p = 0.002). The mean for male (n = 24, 21.2 cm) and female (n = 22, 27.2 cm) CHD patients was significantly lower than their respective population norms (p = 0.017 and p = 0.026, respectively). After the fitness intervention, flexibility in CHD patients significantly improved to normal, including patients with a history of sternotomy. Flexibility was significantly lower in CHD patients than the general population, but normalized with training. Further research is warranted to investigate associations of flexibility with other measures of fitness, cardiovascular status, and quality of life, as well as benefits gained with training.
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Affiliation(s)
- Katherine Hansen
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Avenue BCH 3215, Boston, MA, 02115, USA.
| | - Tracy Curran
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Avenue BCH 3215, Boston, MA, 02115, USA
| | - Julie Ann O'Neill
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Avenue BCH 3215, Boston, MA, 02115, USA
| | - Lindsey Reynolds
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Avenue BCH 3215, Boston, MA, 02115, USA
| | - Kimberlee Gauvreau
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Avenue BCH 3215, Boston, MA, 02115, USA
| | - Naomi Gauthier
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Avenue BCH 3215, Boston, MA, 02115, USA
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Bossung V, Singer A, Ratz T, Rothenbühler M, Leeners B, Kimmich N. Changes in Heart Rate, Heart Rate Variability, Breathing Rate, and Skin Temperature throughout Pregnancy and the Impact of Emotions-A Longitudinal Evaluation Using a Sensor Bracelet. SENSORS (BASEL, SWITZERLAND) 2023; 23:6620. [PMID: 37514915 PMCID: PMC10385491 DOI: 10.3390/s23146620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/10/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
(1) Background: Basic vital signs change during normal pregnancy as they reflect the adaptation of maternal physiology. Electronic wearables like fitness bracelets have the potential to provide vital signs continuously in the home environment of pregnant women. (2) Methods: We performed a prospective observational study from November 2019 to November 2020 including healthy pregnant women, who recorded their wrist skin temperature, heart rate, heart rate variability, and breathing rate using an electronic wearable. In addition, eight emotions were assessed weekly using five-point Likert scales. Descriptive statistics and a multivariate model were applied to correlate the physiological parameters with maternal emotions. (3) Results: We analyzed data from 23 women using the electronic wearable during pregnancy. We calculated standard curves for each physiological parameter, which partially differed from the literature. We showed a significant association of several emotions like feeling stressed, tired, or happy with the course of physiological parameters. (4) Conclusions: Our data indicate that electronic wearables are helpful for closely observing vital signs in pregnancy and to establish modern curves for the physiological course of these parameters. In addition to physiological adaptation mechanisms and pregnancy disorders, emotions have the potential to influence the course of physiological parameters in pregnancy.
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Affiliation(s)
- Verena Bossung
- Department of Obstetrics, University Hospital Zurich (USZ), University of Zurich (UZH), 8091 Zurich, Switzerland
| | - Adrian Singer
- Department of Obstetrics, University Hospital Zurich (USZ), University of Zurich (UZH), 8091 Zurich, Switzerland
| | - Tiara Ratz
- Department of Reproductive Endocrinology, University Hospital Zurich (USZ), University of Zurich (UZH), 8091 Zurich, Switzerland
| | | | - Brigitte Leeners
- Department of Reproductive Endocrinology, University Hospital Zurich (USZ), University of Zurich (UZH), 8091 Zurich, Switzerland
| | - Nina Kimmich
- Department of Obstetrics, University Hospital Zurich (USZ), University of Zurich (UZH), 8091 Zurich, Switzerland
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Martins DF, Viseux FJF, Salm DC, Ribeiro ACA, da Silva HKL, Seim LA, Bittencourt EB, Bianco G, Moré AOO, Reed WR, Mazzardo-Martins L. The role of the vagus nerve in fibromyalgia syndrome. Neurosci Biobehav Rev 2021; 131:1136-1149. [PMID: 34710514 DOI: 10.1016/j.neubiorev.2021.10.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 08/08/2021] [Accepted: 10/18/2021] [Indexed: 12/15/2022]
Abstract
Fibromyalgia (FM) syndrome is a common illness characterized by chronic widespread pain, sleep problems, fatigue, and cognitive difficulties. Dysfunctional neurotransmitter systems that influence the body's endogenous stress response systems are thought to underlie many of the major FM-related symptoms. A model of FM pathogenesis suggests biological and psychosocial variables interact to influence the genetic predisposition, but the precise mechanisms remain unclear. The Polyvagal Theory provides a theoretical framework from which to investigate potential biological mechanisms. The vagus nerve (VN) has anti-inflammatory properties via its afferent and efferent fibers. A low vagal tone (as assessed by low heart rate variability), has been observed in painful and inflammatory diseases, including FM, while the ventral branch of the VN is linked to emotional expression and social engagement. These anti-inflammatory and psychological (limbic system) properties of the VN may possess therapeutic potential in treating FM. This review paper summarizes the scientific literature regarding the potential role of the VN in transducing and/or therapeutically managing FM signs and symptoms.
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Affiliation(s)
- Daniel F Martins
- Experimental Neuroscience Laboratory (LaNEx), Physiotherapy Graduate Course, University of Southern Santa Catarina, Palhoça, SC, Brazil; Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, SC, Brazil.
| | - Frederic J F Viseux
- Laboratoire d'Automatique, de Mécanique et d'Informatique industrielle et Humaine (LAMIH), UMR CNRS 8201, Université Polytechnique des Hauts-de-France, Valenciennes, France; Centre d'Evaluation et de Traitement de la Douleur (CETD), Hôpital Jean Bernard, Centre Hospitalier de Valenciennes, F-59322 Valenciennes, France
| | - Daiana C Salm
- Experimental Neuroscience Laboratory (LaNEx), Physiotherapy Graduate Course, University of Southern Santa Catarina, Palhoça, SC, Brazil; Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Palhoça, SC, Brazil
| | - Anny Caroline Avelino Ribeiro
- Experimental Neuroscience Laboratory (LaNEx), Physiotherapy Graduate Course, University of Southern Santa Catarina, Palhoça, SC, Brazil
| | - Helen Kassiana Lopes da Silva
- Experimental Neuroscience Laboratory (LaNEx), Physiotherapy Graduate Course, University of Southern Santa Catarina, Palhoça, SC, Brazil
| | - Lynsey A Seim
- Hospital Internal Medicine, 4500 San Pablo Road, Mayo Clinic, Jacksonville, FL, USA
| | | | - Gianluca Bianco
- Research Laboratory of Posturology and Neuromodulation RELPON, Department of Human Neuroscience, Sapienza University, Rome, Italy; Istituto di Formazione in Agopuntura e Neuromodulazione IFAN, Rome, Italy
| | - Ari Ojeda Ocampo Moré
- Integrative Medicine and Acupuncture Service, University Hospital, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - William R Reed
- Department of Physical Therapy, University of Alabama at Birmingham, Birmingham, AL, USA; Rehabilitation Science Program, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Leidiane Mazzardo-Martins
- Postgraduate Program in Neuroscience, Center of Biological Sciences, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
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Yeo S, Kang JH. Low-Intensity Exercise and Pregnancy Outcomes: An Examination in the Nurses' Health Study II. WOMEN'S HEALTH REPORTS 2021; 2:389-395. [PMID: 34671759 PMCID: PMC8524727 DOI: 10.1089/whr.2021.0011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Accepted: 08/17/2021] [Indexed: 11/14/2022]
Abstract
Background: The benefit of low-intensity exercise (LIE) during pregnancy is poorly understood at a time when few women participate in moderate or vigorous exercise. Using data from the Nurses' Health Study II (NHSII), we tested the hypothesis that women who engaged in more LIE before and during pregnancy experience fewer pregnancy complications. Methods: Among 116,429 U.S. female registered nurses (25–42 years of age) who were enrolled in NHSII in 1989, we included participants (36–50 years of age) who reported in 2001 or 2005 that they were pregnant and completed questionnaires about pregnancy “low-intensity exercise (yoga, stretching, toning),” and who in 2009, provided a full pregnancy outcome history. Multivariable-adjusted relative risk (RR) and 95% confidence intervals (CIs) were calculated between LIE and adverse pregnancy outcomes using log-binomial regression models. Results: Among 225 eligible pregnant participants, 71 (31.6%) reported engaging in any LIE. LIE was associated with lower preterm birth, but not significantly associated with pregnancy loss or other adverse pregnancy outcomes. The RR for any LIE for preterm birth was 0.31 (95% CI: 0.09–1.07), with a significant dose–response association [RR = 0.65 (95% CI: 0.48–0.89) per every 30-minute session]. Some suggestive inverse associations were also observed for other adverse pregnancy outcomes: the RR for any LIE for low birthweight was 0.35 (95% CI: 0.08–1.48); for preeclampsia/gestational hypertension was 0.51 (95% CI: 0.13–1.96); and for gestational diabetes was 0.64 (95% CI: 0.25–1.64). Conclusion: Pregnant women can include yoga, stretching, and toning exercise for promoting wellbeing.
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Affiliation(s)
- SeonAe Yeo
- School of Nursing, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Jae H Kang
- Channing Division of Network Medicine, Brigham and Women's Hospital/Harvard Medical School, Boston, Massachusetts, USA
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Kimmel MC, Fransson E, Cunningham JL, Brann E, Grewen K, Boschiero D, Chrousos GP, Meltzer-Brody S, Skalkidou A. Heart rate variability in late pregnancy: exploration of distinctive patterns in relation to maternal mental health. Transl Psychiatry 2021; 11:286. [PMID: 33986246 PMCID: PMC8119957 DOI: 10.1038/s41398-021-01401-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 03/31/2021] [Accepted: 04/21/2021] [Indexed: 02/03/2023] Open
Abstract
Exploration of photoplethysmography (PPG), a technique that can be translated to the clinic, has the potential to assess the autonomic nervous system (ANS) through heart rate variable (HRV) in pregnant individuals. This novel study explores the complexity of mental health of individuals in a clinical sample responding to a task in late pregnancy; finding those with several types of past or current anxiety disorders, greater trait anxiety, or greater exposure to childhood traumatic events had significantly different HRV findings from the others in the cohort. Lower high frequency (HF), a measure of parasympathetic activity, was found for women who met the criteria for the history of obsessive-compulsive disorder (OCD) (p = 0.004) compared with women who did not meet the criteria for OCD, and for women exposed to greater than five childhood traumatic events (p = 0.006) compared with those exposed to four or less childhood traumatic events. Conversely higher low frequency (LF), a measure thought to be impacted by sympathetic system effects, and the LF/HF ratio was found for those meeting criteria for a panic disorder (p = 0.006), meeting criteria for social phobia (p = 0.002), had elevated trait anxiety (p = 0.006), or exposure to greater than five childhood traumatic events (p = 0.004). This study indicates further research is needed to understand the role of PPG and in assessing ANS functioning in late pregnancy. Study of the impact of lower parasympathetic functioning and higher sympathetic functioning separately and in conjunction at baseline and in relation to tasks during late pregnancy has the potential to identify individuals that require more support and direct intervention.
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Affiliation(s)
- Mary C. Kimmel
- grid.410711.20000 0001 1034 1720Department of Psychiatry, University of North Carolina, Chapel Hill, NC USA ,grid.8993.b0000 0004 1936 9457Department of Women’s and Children’s Health, Uppsala University, Uppsala, Sweden
| | - Emma Fransson
- grid.8993.b0000 0004 1936 9457Department of Women’s and Children’s Health, Uppsala University, Uppsala, Sweden
| | - Janet L. Cunningham
- grid.8993.b0000 0004 1936 9457Department of Neurosciences, Psychiatry, Uppsala University, Uppsala, Sweden
| | - Emma Brann
- grid.8993.b0000 0004 1936 9457Department of Women’s and Children’s Health, Uppsala University, Uppsala, Sweden
| | - Karen Grewen
- grid.410711.20000 0001 1034 1720Department of Psychiatry, University of North Carolina, Chapel Hill, NC USA
| | | | - George P. Chrousos
- grid.5216.00000 0001 2155 0800University Research Institute of Maternal and Child Health and Precision Medicine, UNESCO Chair on Adolescent Health Care, National and Kapodistrian University of Athens, Medical School, Athens, Greece
| | - Samantha Meltzer-Brody
- grid.410711.20000 0001 1034 1720Department of Psychiatry, University of North Carolina, Chapel Hill, NC USA
| | - Alkistis Skalkidou
- grid.8993.b0000 0004 1936 9457Department of Women’s and Children’s Health, Uppsala University, Uppsala, Sweden
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Wong A, Figueroa A. Effects of Acute Stretching Exercise and Training on Heart Rate Variability: A Review. J Strength Cond Res 2021; 35:1459-1466. [PMID: 30789584 DOI: 10.1519/jsc.0000000000003084] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
ABSTRACT Wong, A and Figueroa, A. Effects of acute stretching exercise and training on heart rate variability: A review. J Strength Cond Res 35(5): 1459-1466, 2021-Stretching (ST), an exercise modality widely used for flexibility improvement, has been recently proposed as an effective adjunct therapy for declines in cardiovascular health, warranting research into the effects of ST exercise on cardiac autonomic function (CAF). Heart rate (HR) variability (HRV) is a reliable measure of CAF, mainly the sympathetic and parasympathetic modulations of HR. A low HRV has been associated to increased risk of cardiovascular events and mortality. Exercise interventions that enhance HRV are therefore seen as beneficial to cardiovascular health and are sought after. In this review, we discuss the effect of ST both acute and training on HRV. Stretching training seems to be a useful therapeutic intervention to improve CAF in different populations. Although the mechanisms by which ST training improves CAF are not yet well understood; increases in baroreflex sensitivity, relaxation, and nitric oxide bioavailability seem to play an important role.
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Affiliation(s)
- Alexei Wong
- Department of Health and Human Performance, Marymount University, Arlington, Virginia; and
| | - Arturo Figueroa
- Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, Texas
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Trajano GS, Blazevich AJ. Static Stretching Reduces Motoneuron Excitability: The Potential Role of Neuromodulation. Exerc Sport Sci Rev 2021; 49:126-132. [PMID: 33720914 PMCID: PMC7967995 DOI: 10.1249/jes.0000000000000243] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
Abstract
Prolonged static muscle stretching transiently reduces maximal muscle force, and this force loss has a strong neural component. In this review, we discuss the evidence suggesting that stretching reduces the motoneuron's ability to amplify excitatory drive. We propose a hypothetical model in which stretching causes physiological relaxation, reducing the brainstem-derived neuromodulatory drive necessary to maximize motoneuron discharge rates.
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Affiliation(s)
- Gabriel S Trajano
- School of Exercise and Nutrition Sciences, Faculty of Health, Queensland University of Technology, Brisbane
| | - Anthony J Blazevich
- Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup, Australia
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Kato M, Nihei Green F, Hotta K, Tsukamoto T, Kurita Y, Kubo A, Takagi H. The Efficacy of Stretching Exercises on Arterial Stiffness in Middle-Aged and Older Adults: A Meta-Analysis of Randomized and Non-Randomized Controlled Trials. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17165643. [PMID: 32764418 PMCID: PMC7460052 DOI: 10.3390/ijerph17165643] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 08/02/2020] [Accepted: 08/03/2020] [Indexed: 12/19/2022]
Abstract
Background: Aerobic exercise is known to reduce arterial stiffness; however, high-intensity resistance exercise is associated with increased arterial stiffness. Stretching exercises are another exercise modality, and their effect on arterial stiffness remains unclear. The purpose of this study was to determine whether stretching exercises reduce arterial stiffness in middle-aged and older adults, performing the first meta-analysis of currently available studies. Methods: We searched the literature for randomized controlled trials (RCTs) and non-RCTs published up to January 2020 describing middle-aged and older adults who participated in a stretching intervention vs. controls without exercise training. The primary and secondary outcomes were changes in arterial stiffness and vascular endothelial function and hemodynamic status. Pooled mean differences (MDs) and standard MDs (SMDs) with 95% confidence intervals (CIs) between the intervention and control groups were calculated using a random effects model. Results: We identified 69 trials and, after an assessment of relevance, eight trials, including a combined total of 213 subjects, were analyzed. Muscle stretching exercises were shown to significantly reduce arterial stiffness and improve vascular endothelial function (SMD: −1.00, 95% CI: −1.57 to −0.44, p = 0.0004; SMD: 1.15, 95% CI: 0.26 to 2.03, p = 0.01, respectively). Resting heart rate (HR) and diastolic blood pressure (DBP) decreased significantly after stretching exercise intervention (MD: −0.95 beats/min, 95% CI: −1.67 to −0.23 beats/min, p = 0.009; MD: −2.72 mm Hg, 95% CI: −4.01 to −1.43 mm Hg, p < 0.0001, respectively) Conclusions: Our analyses suggest that stretching exercises reduce arterial stiffness, HR, and DBP, and improve vascular endothelial function in middle-aged and older adults.
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Affiliation(s)
- Michitaka Kato
- Department of Physical Therapy, Shizuoka, Faculty of Health Science, Tokoha University, Shizuoka 420-0911, Japan; (T.T.); (Y.K.)
- Correspondence: ; Tel.: +81-54-297-3200
| | - Fumi Nihei Green
- Anti-aging Center, Ginza Hospital, Tokyo 104-0061, Japan; (F.N.G.); (A.K.)
| | - Kazuki Hotta
- Department of Physical Therapy, Niigata University of Health and Welfare, Niigata 950-3198, Japan;
| | - Toshiya Tsukamoto
- Department of Physical Therapy, Shizuoka, Faculty of Health Science, Tokoha University, Shizuoka 420-0911, Japan; (T.T.); (Y.K.)
| | - Yasunari Kurita
- Department of Physical Therapy, Shizuoka, Faculty of Health Science, Tokoha University, Shizuoka 420-0911, Japan; (T.T.); (Y.K.)
| | - Akira Kubo
- Anti-aging Center, Ginza Hospital, Tokyo 104-0061, Japan; (F.N.G.); (A.K.)
| | - Hisato Takagi
- Department of Cardiovascular Surgery, Shizuoka Medical Center, Shizuoka 411-8611, Japan;
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Wise SL, Binkley JL, Binkley HM. Pregnancy and Postpartum Training: Coaching Considerations. Strength Cond J 2020. [DOI: 10.1519/ssc.0000000000000557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Yuen AWC, Sander JW. Can natural ways to stimulate the vagus nerve improve seizure control? Epilepsy Behav 2017; 67:105-110. [PMID: 28152451 DOI: 10.1016/j.yebeh.2016.10.039] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 10/29/2016] [Indexed: 02/07/2023]
Abstract
The vagus nerve (VN) is the longest cranial nerve, innervating the neck, thorax and abdomen, with afferent fibers transmitting a range of interoceptive stimuli and efferent fibres to somatic structures and autonomic preganglions. Over the last few decades, electrical stimulation of the VN using implanted devices (VNS) has been developed leading to its approval for the treatment of epilepsy and depression. More recently, non-invasive devices to stimulation the VN have been developed. The VN has many functions and the activity that is most amenable to assessment is its effect in controlling the cardiac rhythm. This can be easily assessed by measuring heart rate variability (HRV). Decreased HRV is a result of poorer vagal parasympathetic tone and is associated with a wide range of ill health conditions including a higher risk of early mortality. People with epilepsy, particularly those with poorly controlled seizures, have been shown to have impaired parasympathetic tone. So, might natural ways to stimulate the VN, shown to improve parasympathetic tone as indicated by increased HRV, improve seizure control? There are numerous natural ways that have been shown to stimulate the VN, improving HRV and hence parasympathetic tone. These natural ways fall mainly into 3 categories - stress reduction, exercise, and nutrition. Though the natural ways to stimulate the VN have been shown to increase HRV, they have not been shown to reduce seizures. The exception is listening to Mozart's music, which has been shown to increase parasympathetic tone and decrease seizures. Clearly much more work is required to examine the effect of the various ways to increase HRV on seizure occurrence.
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Affiliation(s)
- Alan W C Yuen
- NIHR University College London Hospitals Biomedical Research Centre, Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, WC1N 3BG London, UK; Epilepsy Society, Chalfont St Peter, UK.
| | - Josemir W Sander
- NIHR University College London Hospitals Biomedical Research Centre, Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, WC1N 3BG London, UK; SEIN-Epilepsy Institute in the Netherlands Foundation, Achterweg 5, 2103 SW Heemstede, The Netherlands; Epilepsy Society, Chalfont St Peter, UK
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