Abstract：
:This paper presents empirical evidence suggesting that healthy humans can perform a two degree of freedom visuo-motor pursuit tracking task with the same response time delay as a one degree of freedom task. In contrast, the time delay of the response is influenced markedly by the nature of the motor synergy required to produce it. We suggest a conceptual account of this evidence based on adaptive model theory, which combines theories of intermittency from psychology and adaptive optimal control from engineering. The intermittent response planning stage has a fixed period. It possesses multiple optimal trajectory generators such that multiple degrees of freedom can be planned concurrently, without requiring an increase in the planning period. In tasks which require unfamiliar motor synergies, or are deemed to be incompatible, internal adaptive models representing movement dynamics are inaccurate. This means that the actual response which is produced will deviate from the one which is planned. For a given target-response discrepancy, corrective response trajectories of longer duration are planned, consistent with the principle of speed-accuracy trade-off. Compared to familiar or compatible tasks, this results in a longer response time delay and reduced accuracy. From the standpoint of the intermittency approach, the findings of this study help make possible a more integral and predictive account of purposive action.
journal_name
Hum Mov Scijournal_title
Human movement scienceauthors
Oytam Y,Neilson PD,O'Dwyer NJdoi
10.1016/j.humov.2005.10.003subject
Has Abstractpub_date
2005-10-01 00:00:00pages
710-30issue
5-6eissn
0167-9457issn
1872-7646pii
S0167-9457(05)00080-1journal_volume
24pub_type
杂志文章abstract：:Meeting the challenge of assembling coherent organizations of very many muscles characterizes a functional level of biological movement systems referred to as the level of muscular-articular links or synergies. The present article examines the issues confronting the forming, regulating, and ordering of synergies and t...
journal_title：Human movement science
pub_type： 杂志文章,评审
doi：10.1016/j.humov.2007.04.002
更新日期：2007-08-01 00:00:00
abstract：:An experiment was designed to determine if the addition of a load altered the effector transfer profile observed in earlier experiments using multi-element movement sequences. The acquisition task required participants to move a horizontal lever (with 0.567kg load) to 16 sequentially projected targets. One group pract...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2009.08.001
更新日期：2010-02-01 00:00:00
abstract：:The capability to effectively control or adapt a movement pattern based on instructional feedback is essential for effective motor skill learning in high-level sport, as it is in other domains such as rehabilitation or music. Despite this, little is known about the capabilities of skilled athletes to use kinematic fee...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2015.02.006
更新日期：2015-06-01 00:00:00
abstract：:Recordings of the dominant finger during the reading of braille sentences by experienced readers reveal that the velocity of the finger changes frequently during the traverse of a line of text. These changes, not previously reported, involve a multitude of accelerations and decelerations, as well as reversals of direc...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2010.05.005
更新日期：2011-08-01 00:00:00
abstract：:This study examined at what age children can engage in the hand rotation task (as a measure of motor imagery); whether engagement changes across development and; the influence of age and motor skill on performance. Children were aged 5-12 years (N=101; 52 girls), with no IQ or motor skill impairment. Less than 40% of ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2014.03.013
更新日期：2014-06-01 00:00:00
abstract：:We explored a two-dimensional task space variant of the classical rhythmical Fitts' task in which participants were asked to sequentially cross four targets arranged around the extreme points of the major axes of an ellipse. Fitts' law was found to adequately describe the changes in movement time with the variations i...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/s0167-9457(01)00038-0
更新日期：2001-06-01 00:00:00
abstract：PURPOSE:Gait disorders in multiple sclerosis (MS) are well studied; however, no previous study has described upper limb movements during gait. However, upper limb movements have an important role during locomotion and can be altered in MS patients due to direct MS lesions or mechanisms of compensation. The aim of this ...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2017.05.014
更新日期：2017-08-01 00:00:00
abstract：:Falls are common in older adults. The most common cause of falls is tripping while walking. Simulation studies demonstrated that older adults may be restricted by lower limb strength and movement speed to regain balance after a trip. This review examines how modeling approaches can be used to determine how different m...
journal_title：Human movement science
pub_type： 杂志文章,评审
doi：10.1016/j.humov.2013.07.001
更新日期：2013-10-01 00:00:00
abstract：:Three-dimensional gait analysis is the gold standard for gait-assessment in patients with stroke. This technique is commonly used to assess the effect of treatment on gait parameters. In clinical practice, three gait analyses are usually carried out (baseline, after treatment and follow-up), the objectives were to def...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2019.01.011
更新日期：2019-04-01 00:00:00
abstract：:The OPTIMAL theory of motor learning contends that an external focus of attention (EF), enhanced expectancies (EE), and autonomy support (AS) are key attentional and motivational variables that optimise motor performance. We examined how integrating an EF into EE and AS interventions would impact young adolescents' st...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2020.102651
更新日期：2020-08-01 00:00:00
abstract：:The present study examined the relationship between executive function (EF) and fine motor control in young and older healthy adults. Participants completed 3 measures of executive function; a spatial working memory (SWM) task, the Stockings of Cambridge task (planning), and the Intra-Dimensional Extra-Dimensional Set...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2016.11.001
更新日期：2017-01-01 00:00:00
abstract：:The aim of this study was to evaluate whether a mental training protocol could improve gymnastic jumping performance. Seventy-two rhythmic gymnasts were randomly divided into an experimental and control group. At baseline, experimental group completed the Movement Imagery Questionnaire Revised (MIQ-R) to assess the gy...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2014.10.001
更新日期：2014-12-01 00:00:00
abstract：:Following total knee replacement (TKR), patients often persist in maladaptive motor behavior which they developed before surgery to cope with symptoms of osteoarthritis. An important challenge in physical therapy is to detect, recognize and change such undesired movement behavior. The goal of this study was to measure...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2020.102623
更新日期：2020-06-01 00:00:00
abstract：:Different modes of perturbations have been used to understand how individuals negotiate irregular surfaces, with a general notion that increased locomotion variability induces a positive training stimulus. Individuals tend to walk slower when initially exposed to such locomotion tasks, potentially influencing the magn...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2018.04.003
更新日期：2018-06-01 00:00:00
abstract：:Two reliable findings in discrete, rapid aimed movements are that reaction time increases with decrease in target diameter (for the short-length movements), and reaction time is not affected by movement length [Journal of Experimental Psychology, Human Perception and Performance 104 (2) (1975) 147]. Participants norma...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/s0167-9457(01)00070-7
更新日期：2001-11-01 00:00:00
abstract：:Previous evidence has shown that males and females display different gait kinematics which may influence the perception of emotions displayed through the same walking gait. We therefore investigated the influence of walker gender on the perception of happiness, sadness, anger and fear displayed through walking movemen...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2017.10.012
更新日期：2018-02-01 00:00:00
abstract：PURPOSE:The understanding of fatigue of the human motor system is important in the fields of ergonomics, sport, rehabilitation and neurology. In order to understand the interactions between fatigue and reaction time, we evaluated the effects of two different fatiguing tasks on reaction time. METHODS:83 healthy subject...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2020.102679
更新日期：2020-10-01 00:00:00
abstract：:When one finger changes its force, other fingers of the hand can show unintended force changes in the same direction (enslaving) and in the opposite direction (error compensation). We tested a hypothesis that externally imposed changes in finger force predominantly lead to error compensation effects in other fingers t...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2010.08.021
更新日期：2011-06-01 00:00:00
abstract：:Suddenly changing direction requires a whole body reorientation strategy. In sporting duels such as an attacker vs. a defender in rugby, successful body orientation/reorientation strategies are essential for successful performance. The aim of this study is to examine which biomechanical factors, while taking into acco...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2009.12.004
更新日期：2010-06-01 00:00:00
abstract：:Persons with multiple sclerosis (PwMS) often report problems due to sensory loss and have an inability to appropriately reweight sensory information. Both of these issues can affect individual's ability to maintain stability when walking under challenging conditions. The purpose of the current study was to determine h...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2019.05.018
更新日期：2019-05-28 00:00:00
abstract：:Recently there has been much interest in social coordination of motor movements, or as it is referred to by some researchers, joint action. This paper reviews the cognitive perspective's common coding/mirror neuron theory of joint action, describes some of its limitations and then presents the behavioral dynamics pers...
journal_title：Human movement science
pub_type： 杂志文章,评审
doi：10.1016/j.humov.2010.05.014
更新日期：2011-10-01 00:00:00
abstract：:Using dynamical modeling tools, the aim of the study was to establish a minimal model reproducing leg movements in cross-country skiing, and to evaluate the eventual adjustments of this model with fatigue. The participants (N=8) skied on a treadmill at 90% of their maximal oxygen consumption, up to exhaustion, using t...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2010.03.001
更新日期：2010-08-01 00:00:00
abstract：:Automated movements adjusting postural control may be hampered during musculoskeletal pain leaving a risk of incomplete control of balance. This study investigated the effect of experimental muscle pain on anticipatory postural adjustments by reaction task movements. While standing, nine healthy males performed two re...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2013.01.009
更新日期：2013-12-01 00:00:00
abstract：:Lifting and falls comprise a large proportion of work related injuries. Repetitive lifting to the point of fatigue can affect postural sway, which is associated with fall risk. To investigate the effects of lifting and fatigue on postural sway in males and females, 35 participants (18 male, 17 female) were asked to li...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2018.03.008
更新日期：2018-06-01 00:00:00
abstract：:The purpose of this study was to elucidate whether the anticipatory postural adjustment (APA) and focal step movement of gait initiation are produced as a single process or different processes and whether the APA receives an inhibitory drive from the ongoing stop process of gait initiation. Healthy humans initiated ga...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2017.01.003
更新日期：2017-04-01 00:00:00
abstract：:Previous studies have found that rates of attention deficit hyperactivity disorder (ADHD) and developmental coordination disorder (DCD) are very similar, both being approximately 7% in sample populations [Kadesjö, B., & Gillberg, C. (1999). Developmental coordination disorder in Swedish 7-year-old children. Journal of...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2005.10.006
更新日期：2006-02-01 00:00:00
abstract：:New insight regarding limb-dominance effects on temporal-spatial gait parameters is needed to further investigate subjects with recurrent low back pain (LBP). Although an asymmetrical gait pattern was found to reflect natural functional differences, there is a lack of information regarding gender differences on domina...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2017.01.002
更新日期：2017-04-01 00:00:00
abstract：:In the context of perceptual-cognitive expertise it is important to know whether physiological loads influence perceptual-cognitive performance. This study examined whether a handball specific physical exercise load influenced participants' speed and accuracy in a flicker task. At rest and during a specific interval e...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2016.05.001
更新日期：2016-08-01 00:00:00
abstract：:Previous studies found little or no transfer of adaptation from reactive saccades to arm pointing movements, which suggests that the two motor systems rely on distinct adaptive mechanisms. However, this conclusion is based on experiments about the adaptation of response amplitudes, which is known to follow somewhat di...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2008.01.001
更新日期：2008-06-01 00:00:00
abstract：:In a bipedal walk, the human body experiences continuous changes in stability especially during weight loading and unloading transitions which are reported crucial to avoid fall. Prior stability assessment methods are unclear to quantify stabilities during these gait transitions due to methodological and/or measuremen...
journal_title：Human movement science
pub_type： 杂志文章
doi：10.1016/j.humov.2019.102558
更新日期：2020-02-01 00:00:00
