Motor Control最新文献_第9页

Startling Acoustic Stimulation Has Task-Specific Effects on Intracortical Facilitation and Inhibition at Rest and During Visually Guided Isometric Elbow Flexion in Healthy Individuals. 触电声刺激对健康个体休息时和视觉引导肘关节等长屈曲时的皮质内促进和抑制有任务特异性影响。

IF 1.1 4区医学

Motor Control Pub Date : 2023-01-01 DOI: 10.1123/mc.2022-0014

Yen-Ting Chen, Shengai Li, Yingchun Zhang, Ping Zhou, Sheng Li

{"title":"Startling Acoustic Stimulation Has Task-Specific Effects on Intracortical Facilitation and Inhibition at Rest and During Visually Guided Isometric Elbow Flexion in Healthy Individuals.","authors":"Yen-Ting Chen, Shengai Li, Yingchun Zhang, Ping Zhou, Sheng Li","doi":"10.1123/mc.2022-0014","DOIUrl":"https://doi.org/10.1123/mc.2022-0014","url":null,"abstract":"Startling acoustic stimulation (SAS) causes a transient effect on the primary motor cortex (M1) nonreflexively. It reduces the cortical excitability at rest, but not during voluntary contraction. However, the effect of SAS on intracortical activity is not clear. The purpose of this study was to investigate the SAS effect on short-interval intracortical inhibition and intracortical facilitation using transcranial magnetic stimulation (TMS). Eleven healthy individuals performed isometric elbow flexion at 10% of maximum voluntary contraction on the dominant side with a real-time visual target (i.e., M1 preactivation) or at rest. TMS was delivered to the M1 ipsilateral to elbow flexion without or with SAS delivered 90 ms prior to TMS. There were three TMS delivery conditions: (a) single pulse, (b) short-interval intracortical inhibition, and (c) intracortical facilitation. TMS-induced motor-evoked potential (MEP) was compared between predetermined TMS and SAS conditions at rest and during ipsilateral voluntary contraction. We confirmed that SAS decreased the MEP amplitude at rest, but not during M1 preactivation. SAS caused task-specific effects on intracortical excitability. Specifically, SAS increased intracortical facilitation at rest and during voluntary contraction. However, SAS decreased short-interval intracortical inhibition only during M1 preactivation. Collectively, our results suggest that SAS transiently influences the motor cortex excitability, possibly via its activation of higher centers, to achieve a visually guided goal-directed task.","PeriodicalId":49795,"journal":{"name":"Motor Control","volume":"27 1","pages":"96-111"},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10356704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Optimality, Stability, and Agility of Human Movement: New Optimality Criterion and Trade-Offs. 人类运动的最优性、稳定性和敏捷性:新的最优性标准和权衡。

IF 1.1 4区医学

Motor Control Pub Date : 2023-01-01 DOI: 10.1123/mc.2021-0135

Mark L Latash

引用次数: 3

Between a Walk and a Hard Place: How Stepping Patterns Change While Navigating Environmental Obstacles. 在行走和艰难的地方之间:行走模式如何在导航环境障碍时发生变化。

IF 1.1 4区医学

Motor Control Pub Date : 2023-01-01 DOI: 10.1123/mc.2022-0045

Ashwini Kulkarni, Chuyi Cui, Shirley Rietdyk, Satyajit Ambike

{"title":"Between a Walk and a Hard Place: How Stepping Patterns Change While Navigating Environmental Obstacles.","authors":"Ashwini Kulkarni, Chuyi Cui, Shirley Rietdyk, Satyajit Ambike","doi":"10.1123/mc.2022-0045","DOIUrl":"https://doi.org/10.1123/mc.2022-0045","url":null,"abstract":"Maintaining a consistent relationship between each footfall and the body's motion is a key mechanism to maintain balance while walking. However, environmental features, for example, puddles/obstacles, impose additional constraints on foot placement. This study investigated how healthy young individuals alter foot placements to simultaneously manage body-centric and environmental constraints during an obstacle-crossing task. Consistent step length promotes balance for all steps, whereas accurate foot placement around the obstacle is essential to avoid a trip. While crossing an obstacle, any error in positioning one foot relative to the obstacle can be compensated by selecting the placement of the subsequent step. However, compensation will necessarily alter step length from its average value. The interstep covariance index computed from two consecutive foot placements was used to quantify this tradeoff between body-centric and environmental constraints for six consecutive steps while approaching, crossing, and resuming unobstructed gait after crossing the obstacle. The index declined only when either one or both feet were adjacent to the obstacle. The decline was driven in part by a tendency toward higher step length variability. Thus, changes in the stepping patterns to address the environmental constraint occurred at the cost of the body-centric constraint. However, the step length never ceased to be controlled; the interstep covariance index was positive for all steps. Overall, participants adapted foot placement control to account for the larger threat to balance. The environmental constraint was prioritized only when a potential trip posed greater threat to balance compared with the threat posed by variable step length.","PeriodicalId":49795,"journal":{"name":"Motor Control","volume":"27 1","pages":"20-34"},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10455255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Introduction to the Special Z-Issue in Honor of the 90th Birthday of Vladimir M. Zatsiorsky. 为纪念Vladimir M. Zatsiorsky诞辰90周年而发行的z特刊简介。

IF 1.1 4区医学

Motor Control Pub Date : 2023-01-01 DOI: 10.1123/mc.2022-0118

Mark L Latash

{"title":"Introduction to the Special Z-Issue in Honor of the 90th Birthday of Vladimir M. Zatsiorsky.","authors":"Mark L Latash","doi":"10.1123/mc.2022-0118","DOIUrl":"https://doi.org/10.1123/mc.2022-0118","url":null,"abstract":"This Special Z-Issue of Motor Control contains papers written by students, trainees, and younger colleagues of Professor Vladimir M. Zatsiorsky, who turns 90 years young in December 2022, and continues being an inspiration for researchers in movement science. The contributions of Vladimir Zatsiorsky to biomechanics, sport science, and motor control are so many and varied that he is rightfully viewed as a classic in all those ﬁ elds of research. In these brief introductory comments, I will try to focus on the main contributions of Vladimir to motor control, although many of those studies can also be viewed as pertaining to biomechanics.Mostearlier studies by Vladimir were in the ﬁ elds of biomechanics and sport science. Those early studies culminated in a book Physical Qualities of an Athlete published in 1966 in Russian. This book became a bestseller and was translated into 10 languages. After his emigration to the United States, Vladimir published three volumes (Zatsiorsky, 1998, 2002; Zatsiorsky & Prilutsky, 2012) that have become the go-to sources for researchers in biomechanics and motor control. In addition, he wrote a book on strength training (Zatsiorsky, 1995), which has become his most popular publication if one judges by the number of citations. I","PeriodicalId":49795,"journal":{"name":"Motor Control","volume":"27 1","pages":"1-5"},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9557547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Mental Fatigue on Strength Endurance: A Systematic Review and Meta-Analysis. 心理疲劳对力量耐力的影响：系统回顾与元分析。

IF 0.9 4区医学

Motor Control Pub Date : 2022-12-12 Print Date: 2023-04-01 DOI: 10.1123/mc.2022-0051

Carlos Alix-Fages, Jozo Grgic, Pablo Jiménez-Martínez, Eneko Baz-Valle, Carlos Balsalobre-Fernández

{"title":"Effects of Mental Fatigue on Strength Endurance: A Systematic Review and Meta-Analysis.","authors":"Carlos Alix-Fages, Jozo Grgic, Pablo Jiménez-Martínez, Eneko Baz-Valle, Carlos Balsalobre-Fernández","doi":"10.1123/mc.2022-0051","DOIUrl":"10.1123/mc.2022-0051","url":null,"abstract":"The purpose of the present systematic review and meta-analysis was to explore the effects of mental fatigue on upper and lower body strength endurance. Searches for studies were performed in the PubMed/MEDLINE and Web of Science databases. We included studies that compared the effects of a demanding cognitive task (set to induce mental fatigue) with a control condition on strength endurance in dynamic resistance exercise (i.e., expressed as the number of performed repetitions at a given load). The data reported in the included studies were pooled in a random-effects meta-analysis of standardized mean differences. Seven studies were included in the review. We found that mental fatigue significantly reduced the number of performed repetitions for upper body exercises (standardized mean difference: -0.41; 95% confidence interval [-0.70, -0.12]; p = .006; I2 = 0%). Mental fatigue also significantly reduced the number of performed repetitions in the analysis for lower body exercises (standardized mean difference: -0.39; 95% confidence interval [-0.75, -0.04]; p = .03; I2 = 0%). Our results showed that performing a demanding cognitive task-which induces mental fatigue-impairs strength endurance performance. Collectively, our findings suggest that exposure to cognitive tasks that may induce mental fatigue should be minimized before strength endurance-based resistance exercise sessions.","PeriodicalId":49795,"journal":{"name":"Motor Control","volume":"27 2","pages":"442-461"},"PeriodicalIF":0.9,"publicationDate":"2022-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9230400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical Stimulation of Distal Tibial Nerve During Stance Phase of Walking May Reverse Effects of Unilateral Paw Pad Anesthesia in the Cat. 步行站立期对胫骨远端神经的电刺激可能逆转猫单侧爪垫麻醉的效果。

IF 0.9 4区医学

Motor Control Pub Date : 2022-10-31 Print Date: 2023-01-01 DOI: 10.1123/mc.2022-0096

Hangue Park, Alexander N Klishko, Kyunggeune Oh, Celina Zhang, Gina Grenga, Kinsey R Herrin, John F Dalton, Robert S Kistenberg, Michel A Lemay, Mark Pitkin, Stephen P DeWeerth, Boris I Prilutsky

{"title":"Electrical Stimulation of Distal Tibial Nerve During Stance Phase of Walking May Reverse Effects of Unilateral Paw Pad Anesthesia in the Cat.","authors":"Hangue Park, Alexander N Klishko, Kyunggeune Oh, Celina Zhang, Gina Grenga, Kinsey R Herrin, John F Dalton, Robert S Kistenberg, Michel A Lemay, Mark Pitkin, Stephen P DeWeerth, Boris I Prilutsky","doi":"10.1123/mc.2022-0096","DOIUrl":"10.1123/mc.2022-0096","url":null,"abstract":"Cutaneous feedback from feet is involved in regulation of muscle activity during locomotion, and the lack of this feedback results in motor deficits. We tested the hypothesis that locomotor changes caused by local unilateral anesthesia of paw pads in the cat could be reduced/reversed by electrical stimulation of cutaneous and proprioceptive afferents in the distal tibial nerve during stance. Several split-belt conditions were investigated in four adult female cats. In addition, we investigated the effects of similar distal tibial nerve stimulation on overground walking of one male cat that had a transtibial, bone-anchored prosthesis for 29 months and, thus, had no cutaneous/proprioceptive feedback from the foot. In all treadmill conditions, cats walked with intact cutaneous feedback (control), with right fore- and hindpaw pads anesthetized by lidocaine injections, and with a combination of anesthesia and electrical stimulation of the ipsilateral distal tibial nerve during the stance phase at 1.2× threshold of afferent activation. Electrical stimulation of the distal tibial nerve during the stance phase of walking with anesthetized ipsilateral paw pads reversed or significantly reduced the effects of paw pad anesthesia on several kinematic variables, including lateral center of mass shift, cycle and swing durations, and duty factor. We also found that stimulation of the residual distal tibial nerve in the prosthetic hindlimb often had different effects on kinematics compared with stimulation of the intact hindlimb with paw anesthetized. We suggest that stimulation of cutaneous and proprioceptive afferents in the distal tibial nerve provides functionally meaningful motion-dependent sensory feedback, and stimulation responses depend on limb conditions.","PeriodicalId":49795,"journal":{"name":"Motor Control","volume":"27 1","pages":"71-95"},"PeriodicalIF":0.9,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9772080/pdf/nihms-1852356.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10460416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

External Focus Reduces Accuracy and Increases Antagonist Muscle Activation in Novice Adolescent Soccer Players. 青少年足球新手的外部焦点降低准确性并增加拮抗剂肌肉激活。

IF 1.4 4区医学

Motor Control Pub Date : 2022-10-26 Print Date: 2023-04-01 DOI: 10.1123/mc.2022-0018

Serkan Uslu, Emel Çetin Özdoğan

{"title":"External Focus Reduces Accuracy and Increases Antagonist Muscle Activation in Novice Adolescent Soccer Players.","authors":"Serkan Uslu, Emel Çetin Özdoğan","doi":"10.1123/mc.2022-0018","DOIUrl":"10.1123/mc.2022-0018","url":null,"abstract":"Instep kick is one of the most effective kicking techniques in soccer. Lower extremity muscles and joints play a crucial role during instep kick. However, external (EF) and internal focus and their effect on the muscles are still ambiguous. In this study, 13 male adolescent soccer players were included and aimed to hit the targets in internal and EF conditions. Lower extremity muscle activations were measured with surface electromyography, and kinematics were measured with a high-speed video camera. Muscle activations and movement latencies were analyzed in four different phases (backswing, leg cocking, acceleration, and follow-through) of kicking. While 10 out of 13 participants kicked accurately in internal focus, only five out of 13 in EF kicked accurately. Gastrocnemius muscle activations increased significantly in EF in all phases except acceleration. Movement latencies were found 0.07 ± 0.002 s for accurate and 0.05 ± 0.004 s for inaccurate kicks in EF. A correlation has been found between accuracy and movement latency in EF (R = .67). Our results suggest that novices cannot yet coordinate their muscles in EF, cocontraction ratio increases. Therefore, training strategies that aim to reduce the cocontraction ratio can help the athlete increase performance through better motor coordination. Moreover, better motor coordination may be beneficial in preventing injuries (joint stiffness, etc.) caused by increased cocontraction ratio.","PeriodicalId":49795,"journal":{"name":"Motor Control","volume":"27 2","pages":"228-241"},"PeriodicalIF":1.4,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10110737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Uncontrolled Manifold Analysis of the Effects of Different Fatigue Locations on Kinematic Coordination During a Repetitive Upper-Limb Task. 重复上肢动作中不同疲劳位置对运动协调影响的非控制流形分析。

IF 1.1 4区医学

Motor Control Pub Date : 2022-09-10 Print Date: 2022-10-01 DOI: 10.1123/mc.2021-0114

Matthew Slopecki, Fariba Hasanbarani, Chen Yang, Christopher A Bailey, Julie N Côté

引用次数: 1

Functional Performance, Leg Muscle Strength, and Core Muscle Endurance in Multiple Sclerosis Patients With Mild Disability: A Cross-Sectional Study. 轻度残疾多发性硬化症患者的功能表现、腿部肌肉力量和核心肌耐力:一项横断面研究。

IF 1.1 4区医学

Motor Control Pub Date : 2022-09-05 Print Date: 2022-10-01 DOI: 10.1123/mc.2021-0129

Cagla Ozkul, Kader Eldemir, Sefa Eldemir, Muhammed Seref Yildirim, Fettah Saygili, Arzu Guclu-Gunduz, Ceyla Irkec

{"title":"Functional Performance, Leg Muscle Strength, and Core Muscle Endurance in Multiple Sclerosis Patients With Mild Disability: A Cross-Sectional Study.","authors":"Cagla Ozkul, Kader Eldemir, Sefa Eldemir, Muhammed Seref Yildirim, Fettah Saygili, Arzu Guclu-Gunduz, Ceyla Irkec","doi":"10.1123/mc.2021-0129","DOIUrl":"https://doi.org/10.1123/mc.2021-0129","url":null,"abstract":"This study aimed to investigate the relationship of sit-to-stand and walking performance with leg muscle strength and core muscle endurance in people with multiple sclerosis (PwMS) with mild disabilities. In this study, 49 PwMS (Expanded Disability Status Scale score = 1.59 ± 0.79) and 26 healthy controls were enrolled. The functional performances, including sit-to-stand and walking performances, were evaluated with the five-repetition sit-to-stand test, timed up and go test, and 6-min walking test. The PwMS finished significantly slower five-repetition sit-to-stand, timed up and go, and 6-min walking test than the healthy controls. In addition, the significant contributors were the weakest trunk lateral flexor endurance for five-repetition sit-to-stand; the Expanded Disability Status Scale score, and the weakest hip adductor muscle for timed up and go; the weakest hip extensor muscles strength for 6-min walking test. The functional performances in PwMS, even with mild disabilities, were lower compared with healthy controls. Decreases in both leg muscle strength and core muscle endurance are associated with lower functional performance in PwMS.","PeriodicalId":49795,"journal":{"name":"Motor Control","volume":" ","pages":"729-747"},"PeriodicalIF":1.1,"publicationDate":"2022-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40353536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Dawn of the Study of Motor Timing: Wilhelm Camerer (1866) and Karl von Vierordt (1868) on the Time Course of Voluntary Movements. 运动计时研究的曙光:威廉·卡默勒(1866)和卡尔·冯·维罗特(1868)关于自愿运动的时间过程。

IF 1.1 4区医学

Motor Control Pub Date : 2022-08-25 Print Date: 2022-10-01 DOI: 10.1123/mc.2022-0048

John H Wearden

{"title":"The Dawn of the Study of Motor Timing: Wilhelm Camerer (1866) and Karl von Vierordt (1868) on the Time Course of Voluntary Movements.","authors":"John H Wearden","doi":"10.1123/mc.2022-0048","DOIUrl":"https://doi.org/10.1123/mc.2022-0048","url":null,"abstract":"This article discusses material from the doctoral thesis of Wilhlem Camerer, which was devoted to the topic of the timing of voluntary movements, and appeared in 1866, thus being one of the earliest studies of any aspect of time perception. It was conducted under the supervision of Karl von Vierordt, at the University of Tübingen in Germany. The data reported come from Camerer's attempts to make a movement over a distance of about 65 mm, either by flexion or extension of his arm, with the behavior recorded via a kymograph, and measured from its trace. Most of his data come from his attempts to make movements at a constant speed, with the speed varying from one trial to another from 5 to 60 mm/s, but he also conducted a study where the movement was intended to be accelerated or decelerated during the trial. In general, when extension movements were intended to be performed with constant speed, a gradual increase in movement speed usually occurred throughout the movement duration. For flexions the opposite occurred, albeit less clearly. Camerer linked the apparent distortions of speed to Vierordt's experiments on the perception of time and his thesis contains what is probably the first mention of Vierordt's Law, the proposition that short times are judged as longer, and long times as shorter, than they really are.","PeriodicalId":49795,"journal":{"name":"Motor Control","volume":" ","pages":"649-660"},"PeriodicalIF":1.1,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40416477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1