scholarly journals REACTIONS OF THE MOTOR SYSTEM IN LOCAL AND GLOBAL ACTIVITIES

2019 ◽  
Vol 17 (Suppl.1) ◽  
pp. 635-637
Author(s):  
Nikolina Dimitrova
Keyword(s):  
Motor Response ◽  
Computing Methodology ◽  
Random Number Generator ◽  
Motor Task ◽  
Football Players ◽  
Time Interval ◽  
Motor Action ◽  
Complex Motor ◽  
Technical Mastery ◽  
The Relationship

The aim of the present study is to determine the relationship between the simple motor response and the reaction that occurs when solving a complex motor task. Three groups of 20 experienced persons were studied, respectively, from the gymnastics, judo and football disciplines. The sport reaction was determined by a standard light source test. Using the video computing methodology and the dynamo platform, the time interval Δt1 for the start of the motor action and the time interval Δt2 for the overall realization were determined. A random number generator is used to vary the time interval between the light signals. Stabilization of the mean score at all surveyed individuals was observed at the latest after the seventh trial. From the results of the variation analysis of the three groups of experienced people, the group of judokas, followed by the football players and the gymnasts, stands out with the best achievements. The character of a sport discipline develops in a specific way the speed of the motor response. Standard results could be used to determine the level of some aspects of the sport-technical mastery through biomechanical criteria for realization efficiency.

Intra-Task Reliability and Specificity of Individual Consistency

1970 ◽  
Vol 30 (2) ◽  
pp. 583-587 ◽  
Author(s):  
Albert V. Carron
Keyword(s):  
Motor Response ◽  
Present Report ◽  
Motor Task ◽  
Response Component ◽  
Linear Movement ◽  
The Mean ◽  
Individual Consistency ◽  
Response Consistency ◽  
Relationship Of ◽  
The Relationship

The present report is based on reanalysis of data of Marisi (1969) in order to examine the relationship of consistency of motor response among the component responses of a single motor task. 120 high school Ss were tested on a special task, the rho. A single trial on this motor task can be logically separated into three component motor responses: reaction time, a short circular movement, and a short linear movement. The results indicated that consistency of motor response was moderately reliable within the response components but tended to be response-component specific. Further, both the reliability and specificity of motor-response consistency were independent of the size of the mean performance scores.

scholarly journals Abstract sequential task control is facilitated by practice and embedded motor sequences

2020 ◽  
Author(s):  
Juliana E. Trach ◽  
Theresa H. McKim ◽  
Theresa M. Desrochers
Keyword(s):  
Motor Response ◽  
Motor Task ◽  
Motor Sequence ◽  
Task Sequence ◽  
Response Level ◽  
Motor Action ◽  
Motor Processing ◽  
Motor Actions ◽  
Everyday Task ◽  
Task Sequences

AbstractEveryday task sequences, such as cooking, contain overarching goals (completing the meal), sub-goals (prepare vegetables), and motor actions (chopping). Such tasks generally are considered hierarchical because superordinate levels (e.g., goals) affect performance at subordinate levels (e.g., sub-goals and motor actions). However, there is debate as to whether this hierarchy is “strict” with unidirectional, top-down influences, and it is unknown if and how practice affects performance at the superordinate levels. To investigate these questions, we manipulated practice with sequences at the goal and motor action levels using an abstract, or non-motor, task sequence paradigm (Desrochers et al., 2015; Schneider & Logan, 2006). In three experiments, participants performed memorized abstract task sequences composed of simple tasks (e.g., color/shape judgements), where some contained embedded motor response sequences. We found that practice facilitated performance and reduced control costs for abstract task sequences and subordinate tasks. The interrelation was different between the hierarchical levels, demonstrating a strict relationship between abstract task sequence goals and sub-goals and a non-strict relationship between sub-goal and motor response levels. Under some conditions, the motor response level influenced the abstract task sequence level in a non-strict manner. Further, manipulating the presence or absence of a motor sequence after learning indicated that these effects were not the result of an integrated representation produced by practice. These experiments provide evidence for a mixed hierarchical model of task sequences and insight into the distinct roles of practice and motor processing in efficiently executing task sequences in daily life.

Efficiency of consolidation on free and serial recall in a complex motor task in school-aged children

2007 ◽  
Author(s):  
Balazs Fugedi ◽  
Laszlo Toth ◽  
Jozsef Bognar ◽  
Salvara I. Marina ◽  
Laszlo Honfi
Keyword(s):  
Serial Recall ◽  
Motor Task ◽  
School Aged Children ◽  
Complex Motor

scholarly journals The relationship between cam morphology and hip and groin symptoms and signs in young male football players

2020 ◽  
Vol 30 (7) ◽  
pp. 1221-1231 ◽  
Author(s):  
Pim Klij ◽  
Abida Z. Ginai ◽  
Marinus P. Heijboer ◽  
Jan A. N. Verhaar ◽  
Jan H. Waarsing ◽  
...  
Keyword(s):  
Young Male ◽  
Football Players ◽  
The Relationship ◽  
Cam Morphology ◽  
Symptoms And Signs

scholarly journals Neurophysiological changes in the visuomotor network after practicing a motor task

2018 ◽  
Vol 120 (1) ◽  
pp. 239-249 ◽  
Author(s):  
James E. Gehringer ◽  
David J. Arpin ◽  
Elizabeth Heinrichs-Graham ◽  
Tony W. Wilson ◽  
Max J. Kurz
Keyword(s):  
Motor Learning ◽  
Motor Planning ◽  
Motor Task ◽  
Force Production ◽  
Oscillatory Activity ◽  
Matching Task ◽  
Force Output ◽  
Motor Action ◽  
Visuomotor Transformations ◽  
Target Matching

Although it is well appreciated that practicing a motor task updates the associated internal model, it is still unknown how the cortical oscillations linked with the motor action change with practice. The present study investigates the short-term changes (e.g., fast motor learning) in the α- and β-event-related desynchronizations (ERD) associated with the production of a motor action. To this end, we used magnetoencephalography to identify changes in the α- and β-ERD in healthy adults after participants practiced a novel isometric ankle plantarflexion target-matching task. After practicing, the participants matched the targets faster and had improved accuracy, faster force production, and a reduced amount of variability in the force output when trying to match the target. Parallel with the behavioral results, the strength of the β-ERD across the motor-planning and execution stages was reduced after practice in the sensorimotor and occipital cortexes. No pre/postpractice changes were found in the α-ERD during motor planning or execution. Together, these outcomes suggest that fast motor learning is associated with a decrease in β-ERD power. The decreased strength likely reflects a more refined motor plan, a reduction in neural resources needed to perform the task, and/or an enhancement of the processes that are involved in the visuomotor transformations that occur before the onset of the motor action. These results may augment the development of neurologically based practice strategies and/or lead to new practice strategies that increase motor learning. NEW & NOTEWORTHY We aimed to determine the effects of practice on the movement-related cortical oscillatory activity. Following practice, we found that the performance of the ankle plantarflexion target-matching task improved and the power of the β-oscillations decreased in the sensorimotor and occipital cortexes. These novel findings capture the β-oscillatory activity changes in the sensorimotor and occipital cortexes that are coupled with behavioral changes to demonstrate the effects of motor learning.

Effect of Turf Toe on Foot Contact Pressures in Professional American Football Players

2009 ◽  
Vol 30 (5) ◽  
pp. 405-409 ◽  
Author(s):  
Robert H. Brophy ◽  
Seth C. Gamradt ◽  
Scott J. Ellis ◽  
Ronnie P. Barnes ◽  
Scott A. Rodeo ◽  
...  
Keyword(s):  
Body Mass Index ◽  
National Football League ◽  
Peak Pressure ◽  
American Football ◽  
Football Players ◽  
Plantar Pressures ◽  
History Of ◽  
Turf Toe ◽  
The Relationship ◽  
Contact Pressures

Background: The relationship between turf toe and plantar foot pressures has not been extensively studied. Two hypotheses were tested in a cohort of professional American football players: first, that a history of turf toe is associated with increased peak hallucal and first metatarsophalangeal (MTP) plantar pressures; second, that decreased range of motion (ROM) of the first MTP correlates with increased peak hallucal and first MTP plantar pressures. Materials and Methods: Forty-four athletes from one National Football League (NFL) team were screened for a history of turf toe during preseason training. Dorsal passive MTP ROM and dynamic plantar pressures were measured in both feet of each player. Anatomical masking was used to assess peak pressure at the first MTP and hallux. Results: First MTP dorsiflexion was significantly lower in halluces with a history of turf toe (40.6 ± 15.1 degrees versus 48.4 ± 12.8 degrees, p = 0.04). Peak hallucal pressures were higher in athletes with turf toe (535 ± 288 kPa versus 414 ± 202 kPa, p = 0.05) even after normalizing for athlete body mass index ( p = 0.0003). Peak MTP pressure was not significantly different between the two groups tested. First MTP dorsiflexion did not correlate with peak hallucal or first MTP pressures. Conclusion: This study showed that turf toe is associated with decreased MTP motion. In addition, increased peak hallucal pressures were found. Further study is warranted to determine whether these pressures correlate with the severity of symptoms or progression of turf toe to first MTP arthritis.

Relationship between Multidimensional Perfectionism and Goal Orientations in Sport

2002 ◽  
Vol 24 (4) ◽  
pp. 376-395 ◽  
Author(s):  
John G.H. Dunn ◽  
Janice Causgrove Dunn ◽  
Daniel G. Syrotuik
Keyword(s):  
Canonical Correlation ◽  
Goal Orientations ◽  
Football Players ◽  
Task Orientation ◽  
Personal Standards ◽  
Parental Pressure ◽  
Multidimensional Construct ◽  
Maladaptive Perfectionism ◽  
Concern Over Mistakes ◽  
The Relationship

This study examined the relationship between perfectionism and goal orientations among male Canadian Football players (M age = 18.24 years). Athletes (N = 174) completed inventories to assess perfectionist orientations and goal orientations in sport. Perfectionism was conceptualized as a multidimensional construct and was measured with a newly constructed sport-specific version of the Multidimensional Perfectionism Scale (MPS; Frost, Marten, Lahart, & Rosenblate, 1990). Exploratory factor analysis of the modified MPS revealed four sport-related perfectionism dimensions: perceived parental pressure, personal standards, concern over mistakes, and perceived coach pressure. Canonical correlation analysis obtained two significant canonical functions (RC1 = .36; RC2 = .30). The first one revealed that task orientation was positively correlated with an adaptive profile of perfectionism. The second one revealed that ego orientation was positively associated with a maladaptive profile of perfectionism. Results are discussed in the context of Hamachek’s (1978) conceptualization of adaptive and maladaptive perfectionism.

Intracerebral recording of readiness potential induced by a complex motor task

2001 ◽  
Vol 16 (4) ◽  
pp. 698-704 ◽  
Author(s):  
Ivan Rektor ◽  
Martin Bare? ◽  
Petr Ka?ovsk� ◽  
Miloslav Kukleta
Keyword(s):  
Motor Task ◽  
Readiness Potential ◽  
Complex Motor

scholarly journals Complex motor task associated with non-linear BOLD responses in cerebro-cortical areas and cerebellum

2015 ◽  
Vol 221 (5) ◽  
pp. 2443-2458 ◽  
Author(s):  
Adnan A. S. Alahmadi ◽  
Rebecca S. Samson ◽  
David Gasston ◽  
Matteo Pardini ◽  
Karl J. Friston ◽  
...  
Keyword(s):  
Motor Task ◽  
Cortical Areas ◽  
Bold Responses ◽  
Non Linear ◽  
Complex Motor

Enhancement of Eye Motor Response and Electrical Brain Activity during Noise and Vibration in Rabbits

1982 ◽  
Vol 90 (1) ◽  
pp. 130-138 ◽  
Author(s):  
Ilmari Pyykkö ◽  
Izuru Matsuoka ◽  
Shinsuke Ito ◽  
Manabe Hinoki
Keyword(s):  
Motor Response ◽  
Optokinetic Nystagmus ◽  
Dorsal Hippocampus ◽  
Brain Activity ◽  
Noise And Vibration ◽  
Implanted Electrodes ◽  
Theta Waves ◽  
Electrical Brain Activity ◽  
The Relationship ◽  
Electroencephalogram Eeg

The relationship between electroencephalogram (EEG) and eye movements was studied in rabbits during optokinetic, vestibular, and optovestibular tests. EEG was recorded through permanently implanted electrodes. Exposure to noise and vibration increased the frequency and the velocity of optokinetic nystagmus (OKN). The increase was greater during vibration but greatest during combined noise and vibration. EEG activity was closely linked to changes in OKN and was particularly evident with the appearance of theta waves in the dorsal hippocampus. Also, rotation of the rabbit produced considerable activation in the EEG.

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