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Transcranial direct current stimulation suggests not improving postural control during adapted tandem position in people with Parkinson’s disease: a pilot study
(Elsevier, 2023-08-24) Legutke, Beatriz Regina [UNESP]; Gobbi, Lilian Teresa Bucken [UNESP]; Orcioli-Silva, Diego [UNESP]; Santos, Paulo Cezar Rocha Dos; Moraca, Gabriel Antonio Gazziero [UNESP]; Vitório, Rodrigo; Beretta, Victor Spiandor [UNESP]; Universidade Estadual Paulista (Unesp)
Background: Balance impairments in people with Parkinson's disease (PD) demonstrated mainly in challenging postural tasks, such as increased body oscillation may be attributed to the deficits in the brain structures functionality involved in postural control (e.g., motor cortex, midbrain, and brainstem). Although promising results, the effect of transcranial direct current stimulation (tDCS) on postural control in people with PD is unclear, especially in objective measures such as the center of pressure (CoP) parameters. Thus, we analyzed the effects of a single session of tDCS on the CoP parameters during the adapted tandem position in people with PD. Methods: Nineteen people with PD participated in this crossover, randomized, and double-blind study. Anodal tDCS was applied over the primary motor cortex in two conditions of stimulation (2 mA/active and sham) on two different days for 20 minutes immediately before the postural control evaluation. Participants remained standing in an adapted tandem position for the postural control assessment for 30 seconds (three trials). CoP parameters were acquired by a force plate. Results: No significant differences were demonstrated between stimulation conditions (p-value range = 0.15-0.89). Conclusions: Our results suggested that a single session of tDCS with 2 mA does not improve the postural control of people with PD during adapted tandem.
Smoking Intensity Increases Diaphragm Muscle Injury: A Clinicopathologic Study
(2023-06-01) Nucci, Ricardo Aparecido Baptista; Busse, Alexandre Leopold; de Souza, Romeu Rodrigues; Maifrino, Laura Beatriz Mesiano; Pasqualucci, Carlos Augusto; Anaruma, Carlos Alberto [UNESP]; Leite, Renata Elaine Paraizo; Rodriguez, Roberta Diehl; Suemoto, Claudia Kimie; Jacob-Filho, Wilson; Universidade de São Paulo (USP); 9 de Julho University—UNINOVE; Faculty of Medicine of the ABC District; Dante Pazzanese Institute of Cardiology; Universidade Estadual Paulista (UNESP)
Background: Studying the effects of smoking intensity is important to evaluate the risk of tobacco use on a range of illnesses, such as as sarcopenia among the elderly. Thus, this study aimed to analyze the effects of pack-years of cigarette smoking on the diaphragm muscle (DIAm) histopathology of postmortem samples. Methods: Subjects were divided into three groups: never-smoker (n = 46); less than 30 pack-years of smoking (n = 12); and more than 30 pack-years of smoking (n = 30). Diaphragm samples were stained with Picrosirius red and hematoxylin and eosin stain for general structure. Results: Participants with more than 30 pack-years of cigarette smoking had a significant increase in adipocytes, blood vessels and collagen deposit, as well as an increase in histopathological alterations. Conclusions: Pack-years of smoking was associated with DIAm injury. However, further clinicopathological studies are needed to confirm our findings.
Electrocortical Dynamics of Usual Walking and the Planning to Step over Obstacles in Parkinson’s Disease
(2023-05-01) Vitório, Rodrigo [UNESP]; Lirani-Silva, Ellen; Orcioli-Silva, Diego [UNESP]; Beretta, Victor Spiandor [UNESP]; Oliveira, Anderson Souza; Gobbi, Lilian Teresa Bucken [UNESP]; Universidade Estadual Paulista (UNESP); Northumbria University; Newcastle University; Aalborg University
The neural correlates of locomotion impairments observed in people with Parkinson’s disease (PD) are not fully understood. We investigated whether people with PD present distinct brain electrocortical activity during usual walking and the approach phase of obstacle avoidance when compared to healthy individuals. Fifteen people with PD and fourteen older adults walked overground in two conditions: usual walking and obstacle crossing. Scalp electroencephalography (EEG) was recorded using a mobile 64-channel EEG system. Independent components were clustered using a k-means clustering algorithm. Outcome measures included absolute power in several frequency bands and alpha/beta ratio. During the usual walk, people with PD presented a greater alpha/beta ratio in the left sensorimotor cortex than healthy individuals. While approaching obstacles, both groups reduced alpha and beta power in the premotor and right sensorimotor cortices (balance demand) and increased gamma power in the primary visual cortex (visual demand). Only people with PD reduced alpha power and alpha/beta ratio in the left sensorimotor cortex when approaching obstacles. These findings suggest that PD affects the cortical control of usual walking, leading to a greater proportion of low-frequency (alpha) neuronal firing in the sensorimotor cortex. Moreover, the planning for obstacle avoidance changes the electrocortical dynamics associated with increased balance and visual demands. People with PD rely on increased sensorimotor integration to modulate locomotion.
Chronic Adaptations to Eccentric Cycling Training: A Systematic Review and Meta-Analysis
(2023-02-01) Barreto, Renan Vieira [UNESP]; de Lima, Leonardo Coelho Rabello; Borszcz, Fernando Klitzke; de Lucas, Ricardo Dantas; Denadai, Benedito Sérgio [UNESP]; Universidade Estadual Paulista (UNESP); Universidade de São Paulo (USP); Universidade Federal de Santa Catarina (UFSC)
This study aimed to investigate the effects of eccentric cycling (ECCCYC) training on performance, physiological, and morphological parameters in comparison to concentric cycling (CONCYC) training. Searches were conducted using PubMed, Embase, and ScienceDirect. Studies comparing the effect of ECCCYC and CONCYC training regimens on performance, physiological, and/or morphological parameters were included. Bayesian multilevel meta-analysis models were used to estimate the population’s mean difference between chronic responses from ECCCYC and CONCYC training protocols. Group levels and meta-regression were used to evaluate the specific effects of subjects and study characteristics. Fourteen studies were included in this review. The meta-analyses showed that ECCCYC training was more effective in increasing knee extensor strength, vastus lateralis fiber cross-sectional area, and six-minute walking distance compared to CONCYC. Moreover, ECCCYC was as effective as CONCYC in decreasing body fat percentage. CONCYC was more effective in increasing (Formula presented.) and peak power output attained during concentric incremental tests. However, group-level analyses revealed that ECCCYC was more effective than CONCYC in improving (Formula presented.) in patients with cardiopulmonary diseases. ECCCYC is a viable modality for exercise interventions aiming to improve parameters of muscle strength, hypertrophy, functional capacity, aerobic power, and body composition, with more advantages than CONCYC training in improving neuromuscular variables.
Energy metabolism and muscle activation heterogeneity explain (Formula presented.) slow component and muscle fatigue of cycling at different intensities
(2023-03-01) do Nascimento Salvador, Paulo Cesar; Nascimento, Eduardo Marcel Fernandes; Antunes, Diego; Guglielmo, Luiz Guilherme Antonacci; Denadai, Benedito Sérgio [UNESP]; Universidade Federal de Santa Catarina (UFSC); Leonardo da Vinci University – Uniasselvi/VITRU Education; Universidade Estadual Paulista (UNESP)
New Findings: What is the central question of this study? What are the physiological mechanisms underlying muscle fatigue and the increase in the O2 cost per unit of work during high-intensity exercise? What is the main finding and its importance? Muscle fatigue happens before, and does not explain, the (Formula presented.) slow component ((Formula presented.)), but they share the same origin. Muscle activation heterogeneity is associated with muscle fatigue and (Formula presented.). Knowing this may improve training prescriptions for healthy people leading to improved public health outcomes. Abstract: This study aimed to explain the (Formula presented.) slow component ((Formula presented.)) and muscle fatigue during cycling at different intensities. The muscle fatigue of 16 participants was determined through maximal isokinetic effort lasting 3 s during constant work rate bouts of moderate (MOD), heavy (HVY) and very heavy intensity (VHI) exercise. Breath-by-breath (Formula presented.), near-infrared spectroscopy signals and EMG activity were analysed (thigh muscles). (Formula presented.) was higher during VHI exercise (∼70% vs. ∼28% of (Formula presented.) reserve in HVY). The deoxygenated haemoglobin final value during VHI exercise was higher than during HVY and MOD exercise (∼90% of HHb physiological normalization, vs. ∼82% HVY and ∼45% MOD). The muscle fatigue was greater after VHI exercise (∼22% vs. HVY ∼5%). There was no muscle fatigue after MOD exercise. The greatest magnitude of muscle fatigue occurred within 2 min (VHI ∼17%; HVY ∼9%), after which it stabilized. No significant relationship between (Formula presented.) and muscle force production was observed. The τ of muscle (Formula presented.) was significantly related (R2 = 0.47) with torque decrease for VHI. Type I and II muscle fibre recruitment mainly in the rectus femoris moderately explained the muscle fatigue (R2 = 0.30 and 0.31, respectively) and the (Formula presented.) (R2 = 0.39 and 0.27, respectively). The (Formula presented.) is also partially explained by blood lactate accumulation (R2 = 0.42). In conclusion muscle fatigue and O2 cost seem to share the same physiological cause linked with a decrease in the muscle (Formula presented.) and a change in lactate accumulation. Muscle fatigue and (Formula presented.) are associated with muscle activation heterogeneity and metabolism of different muscles activated during cycling.
Could middle- and long-distance running performance of well-trained athletes be best predicted by the same aerobic parameters?
(2022-01-01) Denadai, Benedito Sérgio [UNESP]; Greco, Camila Coelho [UNESP]; Universidade Estadual Paulista (UNESP)
The prediction of running performance at different competitive distances is a challenge, since it can be influenced by several physiological, morphological and biomechanical factors. In experienced male runners heterogeneous for maximal oxygen uptake (VO2max), endurance running performance can be well predicted by several key parameters of aerobic fitness such as VO2max and its respective velocity (vVO2max), running economy, blood lactate response to exercise, oxygen uptake kinetics and critical velocity. However, for a homogeneous group of well-trained endurance runners, the relationship between aerobic fitness parameters and endurance running performance seems to be influenced by the duration of the race (i.e., middle vs. long). Although middle-distance and ultramarathon runners present high aerobic fitness levels, there is no accumulating evidence showing that the aerobic key parameters influence both 800-m and ultramarathon performance in homogeneous group of well-trained runners. The vVO2max seems to be the best predictor of performance for 1500 m. For 3000 m, both vVO2max and blood lactate response to exercise are the main predictors of performance. Finally, for long distance events (5000 m, 10,000 m, marathon and ultramarathon), blood lactate response seems to be main predictor of performance. The different limiting/determinants factors and/or training-induced changes in aerobic parameters can help to explain this time- or distance-dependent pattern.
Does creatine supplementation affect recovery speed of impulse above critical torque?
(2022-01-01) Abdalla, Leonardo Henrique Perinotto [UNESP]; Broxterman, Ryan Michael; Barstow, Thomas Jackson; Greco, Camila Coelho [UNESP]; Denadai, Benedito Sérgio [UNESP]; Universidade Estadual Paulista (UNESP); University of Utah; VA Medical Center; Kansas State University
We previously reported that creatine supplementation improved intermittent isometric exercise performance by augmenting the total impulse performed above end-test torque (total IET′). However, our previous analyses did not enable mechanistic assessments. The objective of this study was to determine if creatine supplementation affected the IET′ speed of recovery. To achieve this objective, we retrospectively analyzed our data using the IET′ balance model to determine the time constant for the recovery of IET′ (τIET′). Sixteen men were randomly allocated into creatine (N = 8) or placebo (N = 8) groups. Prior to supplementation, participants performed quadriceps all-out exercise to determine end-test torque (ET) and IETʹ. Participants then performed quadriceps exercise at ET + 10% until task-failure before supplementation (Baseline), until task-failure after supplementation (Creatine or Placebo), and until the Baseline time after supplementation (Creatine- or Placebo-Isotime). τIET′ was faster than Baseline for Creatine (669 ± 98 vs 470 ± 66 s), but not Placebo (792 ± 166 vs 786 ± 161 s). The creatine-induced change in τIET′ was inversely correlated with the creatine-induced changes in both the rate of peripheral fatigue development and time to task-failure. τIET′ was inversely correlated with total IET′ and ET in all conditions, but creatine supplementation shifted this relationship such that τIET′ was faster for a given ET. Creatine supplementation, therefore, sped the recovery of IET′ during intermittent isometric exercise, which was inversely related to the improvement in exercise performance. These findings support that the improvement in exercise performance after creatine supplementation was, at least in part, specific to effects on the physiological mechanisms that determine the IET′ speed of recovery. HIGHLIGHTS Sixteen healthy participants were randomly allocated to creatine supplementation or placebo groups. Creatine supplementation accelerated the time constant for the recovery of IET′ (τIET′). The time constant for the recovery of IET′ (τIET′) was inversely related to both the rate of peripheral fatigue development and the time to task failure.
Critical power: Evidence-based robustness
(2023-01-01) Abdalla, Leonardo Henrique Perinotto [UNESP]; Greco, Camila Coelho [UNESP]; Denadai, Benedito Sérgio [UNESP]; Universidade Estadual Paulista (UNESP)
Benefits associated with the standing position during visual search tasks
(2023-01-01) Bonnet, Cédrick T.; Singh, Tarkeshwar; Barela, Jose A. [UNESP]; UMR 9193 - SCALab - Sciences Cognitives et Sciences Affectives; The Pennsylvania State University; Universidade Estadual Paulista (UNESP)
The literature on postural control highlights that task performance should be worse in challenging dual tasks than in a single task, because the brain has limited attentional resources. Instead, in the context of visual tasks, we assumed that (i) performance in a visual search task should be better when standing than when sitting and (ii) when standing, postural control should be better when searching than performing the control task. 32 and 16 young adults participated in studies 1 and 2, respectively. They performed three visual tasks (searching to locate targets, free-viewing and fixating a stationary cross) displayed in small images (visual angle: 22°) either when standing or when sitting. Task performance, eye, head, upper back, lower back and center of pressure displacements were recorded. In both studies, task performance in searching was as good (and clearly not worse) when standing as when sitting. Sway magnitude was smaller during the search task (vs. other tasks) when standing but not when sitting. Hence, only when standing, postural control was adapted to perform the challenging search task. When exploring images, and especially so in the search task, participants rotated their head instead of their eyes as if they used an eye-centered strategy. Remarkably in Study 2, head rotation was greater when sitting than when standing. Overall, we consider that variability in postural control was not detrimental but instead useful to facilitate visual task performance. When sitting, this variability may be lacking, thus requiring compensatory movements.
Transcranial direct current stimulation for balance rehabilitation in neurological disorders: A systematic review and meta-analysis
(2022-11-01) Beretta, Victor Spiandor [UNESP]; Santos, Paulo Cezar Rocha; Orcioli-Silva, Diego [UNESP]; Zampier, Vinicius Cavassano [UNESP]; Vitório, Rodrigo [UNESP]; Gobbi, Lilian Teresa Bucken [UNESP]; Universidade Estadual Paulista (UNESP); Weizmann Institute of Science; Universidade Estadual de Campinas (UNICAMP); Northumbria University
Postural instability is common in neurological diseases. Although transcranial direct current stimulation (tDCS) seems to be a promising complementary therapy, emerging evidence indicates mixed results and protocols’ characteristics. We conducted a systematic review and meta-analysis on PubMed, EMBASE, Scopus, and Web of Science to synthesize key findings of the effectiveness of single and multiple sessions of tDCS alone and combined with other interventions on balance in adults with neurological disorders. Thirty-seven studies were included in the systematic review and 33 in the meta-analysis. The reviewed studies did not personalize the stimulation protocol to individual needs/characteristics. A random-effects meta-analysis indicated that tDCS alone (SMD = −0.44; 95%CI = −0.69/−0.19; p < 0.001) and combined with another intervention (SMD = −0.31; 95%CI = −0.51/−0.11; p = 0.002) improved balance in adults with neurological disorders (small to moderate effect sizes). Balance improvements were evidenced regardless of the number of sessions and targeted area. In summary, tDCS is a promising therapy for balance rehabilitation in adults with neurological disorders. However, further clinical trials should identify factors that influence responsiveness to tDCS for a more tailored approach, which may optimize the clinical use of tDCS.
Effect of ischemic compressions versus extracorporeal shockwave therapy on myofascial trigger points: A protocol of a randomized controlled trial
(2023-03-01) Kuroda, Melissa Nahomi [UNESP]; de Aquino Nava, Guilherme Thomaz [UNESP]; Prudencio, Caroline Baldini [UNESP]; Paulo, Daiane Affonso [UNESP]; Peixouto, Isadora [UNESP]; Moroshima, Maiki Yoshi [UNESP]; de Almeida Lourenço, Mariana; da Silva, Caroline Nogueira [UNESP]; Barbosa, Angélica Mércia Pascon [UNESP]; Pedroni, Cristiane Rodrigues [UNESP]; Universidade Estadual Paulista (UNESP); Educational Foundation of the City of Assis (FEMA)
Introduction The myofascial trigger points (MTrPs) are hyperirritable nodules present in a tight muscle band. Among the symptoms, pain is one of the most common, but the individuals may have other sensory, motor, and autonomic changes. Athletes can have MTrPs more intensely due to the high physical and emotional demand. There are a variety of treatments, but not all have strong or moderate evidence of their effectiveness. Thus, the aim of this study is to compare the effects of ischemic compression (IC) and extracorporeal shockwave therapy (ESWT) on pressure pain threshold immediately after the intervention and after 48h. Methods This randomized clinical trial was registered in the Brazilian Registry of Clinical Trial (RBR-6wryhb9) and was approved by the Research Ethics Committee (CAAE 46682921.9.0000.5406). Forty participants will be randomized to receive IC or ESWT treatment once in each MTrPs. The protocol will consist of evaluations before (T0), immediate after (T1), and after forty-eight hours (T2) of the intervention. The primary outcome will be pressure pain threshold and the secondary outcomes will be jump height, muscle strength, dorsiflexion range of motion (ROM), the correlation between MTrPs and temperature and participant’s satisfaction. Conclusions The IC and ESWT have been shown to be efficient in decreasing pain, however, the studies that compare the efficiency of these two treatments are limited in the literature, mainly in the muscles of the lower limbs, which are of great importance and are commonly injured. This study will provide evidence of the IC and ESWT in the triceps surae muscles, assisting in a better treatment for the individual with MTrPs.
Effect of different electrostimulation currents on female urinary incontinence: A protocol of a randomized controlled trial
(2022-12-01) Avramidis, Raissa Escandiusi [UNESP]; Barbosa, Angélica Mércia Pascon [UNESP]; de Aquino Nava, Guilherme Thomaz [UNESP]; Nagami, Danielle Hikaru [UNESP]; Prudencio, Caroline Baldini [UNESP]; Pedroni, Cristiane Rodrigues [UNESP]; Universidade Estadual Paulista (UNESP)
Introduction Urgency urinary incontinence (UUI) is characterized by involuntary urine leakage immediately after reporting of sudden, compelling desire to void. Electrostimulation and non-invasive neuromodulation have been considered as the first and third line of UUI treatment but there is a lack of consensus on which parameters are more efficient. Thus, this study aims to compare the effect of low versus medium frequency currents on urinary incontinence severity and quality of life in women with UUI complains. Methods It will be a randomized controlled trial with 5 arms, double-blinded (outcome assessor and statistician). The study was approved by the Research Ethics Committee (CAAE: 11479119.9.0000.5406) and has been prospectively registered on the Brazilian Registry of Clinical Trials (RBR-8bkkp6). Concerning, double-blind process, the blinded assessor will be responsible for evaluate primary and secondary outcomes at baseline and follow-up without information about allocation and the statistician will perform analyses without information about group codification. One hundred and five participants will be randomized to receive: (1) Transcutaneous tibial nerve stimulation-low frequency, (2) Transcutaneous tibial nerve stimulation-high frequency, (3) Aussie median frequency, (4) Interferencial median frequency or (5) High voltage stimulation. The application will be performed during 20 sessions of 45-minutes, twice a week for 10 weeks, in groups of maximum 5 participants. The participants will be evaluated before treatment (baseline- 0 week), during the treatment (5 weeks) and after the last treatment session (10 weeks). The primary outcomes measures will be UI severity and quality of life, and the secondary outcome will be pelvic floor strength. Statistical analysis will be performed using SPSS software version 24.0 for Windows (IBM Corp., Armonk, N.Y., USA). The variables will be described by the mean and 95% confidence interval. The distribution of normality will be analyzed by the Shapiro-Wilk test. ANOVA for repeated measures will be performed. Mauchly’s test the hypothesis of sphericity and when if this violated the hypotheses, the analyses will be based on the Greenhouse-Geisser test. Peer-to-peer comparisons will be performed using the Bonferroni Post-Hoc test. The significant level adopted will be 5% (p ≤ 0.05). Conclusion This study will enhance knowledge about effect of different neuromodulation currents in the improvement of UUI.
History of inclusive physical education in South America
(Routledge, 2020-01-01) Mauerberg-deCastro, Eliane [UNESP]; Campbell, Debra Frances [UNESP]; Heck, S.; Block, M. E.; Universidade Estadual Paulista (UNESP)
Cultural factors currently affecting inclusive practice - South America
(Routledge, 2020-01-01) Mauerberg-deCastro, Eliane [UNESP]; Campbell, Debra Frances [UNESP]; Heck, S.; Block, M. E.; Universidade Estadual Paulista (UNESP)
AN INTERNATIONAL PERSPECTIVE IN PHYSICAL EDUCATION AND PROFESSIONAL PREPARATION IN ADAPTED PHYSICAL EDUCATION AND ADAPTED PHYSICAL ACTIVITY
(Routledge, 2017-01-01) Mauerberg-deCastro, Eliane [UNESP]; Klavina, Aija; Kudlacek, Martin; Sit, Cindy; Inal, Serap; Ennis, C. D.; Universidade Estadual Paulista (UNESP); Latvian Acad Sport Educ; Palacky Univ Olomouc; Chinese Univ Hong Kong; Yeditepe Univ
Adapted physical activity
(Routledge, 2017-01-01) Mauerberg-deCastro, Eliane [UNESP]; Ennis, C. D.; Universidade Estadual Paulista (UNESP)
THEORY AND PRACTICE IN ADAPTED PHYSICAL EDUCATION The disability rights paradigm in synchrony with complex systems concepts
(Routledge, 2017-01-01) Mauerberg-deCastro, Eliane [UNESP]; Ennis, C. D.; Universidade Estadual Paulista (UNESP)
NO RELATIVE AGE EFFECT AMONG BRAZILIAN ELITE FEMALE FUTSAL ATHLETES: AN ANALYSIS BASED ON TACTICAL INDIVIDUAL PERFORMANCE AND TEAM'S FINAL POSITION IN THE NATIONAL CHAMPIONSHIP
(Univ Zagreb, Fac Kinesiology, 2023-06-01) Rodrigues, Mylena Aparecida Alves; Oliveira, Vivian de [UNESP]; Ribeiro, Lucas de Castro; Bortolan, Kevin William; Clemente, Filipe Manuel; Lima, Ricardo Franco; Figueiredo, Lucas Savassi; Castro, Henrique de Oliveira; Univ Fed Parana; Ctr Univ IESB; Universidade Estadual Paulista (UNESP); Universidade Federal de Minas Gerais (UFMG); Fac FAEL; Inst Politecn Viana Castelo; Sports Performance Recreat Innovat & Technol SPRIN; Delegacao Covilha; Univ Fed Juiz Fora; Univ Fed Mato Grosso; Univ Fed Mato Grosso FEF UFMT
Our aim in this study was to analyze: (i) the presence of the relative age effect (RAE) on the Brazilian elite female futsal athletes according to their team's final position in the National Championship, and (ii) the relationship between the presence of the RAE and the athletes' tactical individual performance. Participants were 77 female Brazilian elite futsal athletes that competed in the 2021 National Championship. Data included their dates of birth aggrupation by quartiles (Q1-Q4), their team's final position in the National Championship, and their tactical individual performance indicators (time played, goals scored, assists, steals, shots on goal, unbalanced passes, and challenges won in 1vs1). Analyses of the overall sample indicated that RAE was not prevalent in this context since the observed birthdate distribution was not different from the expected one (p=.796). When the final placement in the championship was considered, the birthdate distributions were also not different from the expected for both the top-ranked (p=.572) and low-ranked (p=.679) team athletes. Regarding athletes' tactical individual performance, no differences were found between the athletes with early and late birthdates for any of the variables analysed (p>.05). Our results suggest that RAE has no impact on this specific sport context, which should be interpreted as a positive factor since female futsal athletes seem to have the same chance of achieving the elite level in Brazil, regardless of their birthdates.
Could both training status and endurance performance be best predicted by a single key parameter of aerobic fitness?
(Amer Physiological Soc, 2022-07-01) Denadai, Benedito S. [UNESP]; Greco, Camila C. [UNESP]; Universidade Estadual Paulista (UNESP)
Cumulative additional information does not improve the neuromuscular control during postural responses to perturbations in postural instability/gait disorders subtype of Parkinson's disease
(2022-09-01) Beretta, Victor Spiandor [UNESP]; Santos, Paulo Cezar Rocha [UNESP]; Orcioli-Silva, Diego [UNESP]; Jaimes, Diego Alejandro Rojas [UNESP]; Pereira, Marcelo Pinto [UNESP]; Barbieri, Fabio Augusto [UNESP]; Gobbi, Lilian Teresa Bucken [UNESP]; Universidade Estadual Paulista (UNESP); Weizmann Institute of Science; Universidade Estadual de Campinas (UNICAMP); Graduate Program in Physical Education and Sports
Background: Postural response impairments in postural instability and gait disorders (PIGD) subtype patients may be attributed to Parkinson's disease (PD)-deterioration in central-set (programing/modulating of central outputs during motor responses). Although additional information improves some PD motor impairments, an unanswered question is whether additional information can benefit postural response in PIGD subtype. Objective: To analyze the effect of cumulative additional information on postural responses after perturbation in PIGD and neurologically healthy older adults (CG). Methods: Perturbations were applied in 16 PIGD and 19 CG by the support-base translation. Participants performed 3 blocks of 5 trials without additional information (B1–B3, Day 1) and 5 trials of each cumulative additional information (C1–C4, Day 2): information about perturbation (C1), visual (C2), verbal (C3), and somatosensory information (C4). Electromyography and center of pressure (CoP) parameters were analyzed by ANOVAs with Group (PIGD × CG) and Block (B1 × B2 × B3) and with Group (PIGD × CG) and Condition (B3 × C1 × C2 × C3 × C4). Results: PIGD decreased the range of CoP in B3 while CG decreased both range of CoP and the integral of antagonist's muscle activity (iEMG) in B2. Also, PIGD decreased the recovery time in C4 while CG increased the iEMG of agonist's muscle in C2 and antagonist's muscle in all conditions except C2. Conclusion: Additional information provided before postural control assessment influences the postural response in PIGD and CG differently. PIGD demonstrated inflexibility of central-set in modulating the neuromuscular control regardless of additional information. CG presents a flexible system evidenced by the increase of agonist muscle iEMG when provided visual information.

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