The dynamics of visual reweighting in healthy and fall-prone older adults.

abstract：:The effects of reduced frequency of presentation of relative-liming knowledge of results (KR) on constant and serial practice and whether response stability is associated with increased generalized motor program (GMP) learning were examined. Participants (N = 40) were asked to sequentially depress 4 keys (2, 4, 8, and...

journal_title：Journal of motor behavior

authors： Lai Q,Shea CH

更新日期：1998-03-01 00:00:00

abstract：:While self-controlled practice has been shown to be an effective practice methodology, the neuro-cognitive correlates of its effectiveness are unclear. We investigated whether learners participating in self-controlled practice exhibit increased neuro-cognitive engagement compared to externally controlled practice. Two...

journal_title：Journal of motor behavior

authors： Jaquess KJ,Lu Y,Iso-Ahola SE,Zhang J,Gentili RJ,Hatfield BD

更新日期：2020-01-01 00:00:00

abstract：:Changing the nature of a motor response can produce a reliable change in choice reaction time, while the corresponding effect for simple reaction time is unreliable, and disappears with appropriate instructions and practice. The reliable effect for choice reactions was attributed to a component of the reaction time in...

journal_title：Journal of motor behavior

authors： Klapp ST,Patrick Wyatt E,Mac Lingo W

更新日期：1974-12-01 00:00:00

abstract：:Currently, a popular model for the central representation of motor skills is embodied in Schmidt's schema theory of discrete motor skill learning (Schmidt, 1975). Two experiments are reported here that contrast predictions from a schema abstraction model that is the basis for schema theory with those from an exemplar-...

journal_title：Journal of motor behavior

authors： Chamberlin CJ,Magill RA

更新日期：1992-12-01 00:00:00

abstract：:Understanding interactions between cognitive and motor performance is an important theoretical and practical aim of motor neuroscience. Toward this aim, we invited university students to move one hand back and forth at a self-paced rate either in silence or while overtly generating words from semantic categories. The ...

journal_title：Journal of motor behavior

authors： Zhang L,Wininger M,Rosenbaum DA

更新日期：2014-01-01 00:00:00

abstract：:These hypotheses were tested: (1) Freely chosen frequency in unilateral index finger tapping is correlated between the two index fingers, and (2) A 3-min bout of unilateral index finger tapping followed by 10 min rest results in an increase of the freely chosen tapping frequency performed by the contralateral index fi...

journal_title：Journal of motor behavior

authors： Hansen EA,Bak S,Knudsen L,Seiferheld BE,Stevenson AJT,Emanuelsen A

更新日期：2020-01-01 00:00:00

abstract：:The authors investigated the effects of chronic low back pain (LBP) and walking speed (WS) on metabolic power and cost of transport (CT). Subjects with chronic nonspecific LBP (LBP group [LG]; n = 9) and healthy (control group [CG]; n = 9) were included. The test battery was divided into 3 blocks according to WS as fo...

journal_title：Journal of motor behavior

authors： Carvalho AR,Ribeiro Bertor WR,Briani RV,Zanini GM,Silva LI,Andrade A,Peyré-Tartaruga LA

更新日期：2016-05-01 00:00:00

abstract：:Two experiments are reported in which the question of whether or not contextual interference effects are found in motor tasks that require the acquisition of new coordination patterns was examined. Participants (N = 18, Experiment 1; N = 12, Experiment 2) practiced 3 novel bimanual patterns (45 degrees , 90 degrees , ...

journal_title：Journal of motor behavior

authors： Tsutsui S,Lee TD,Hodges NJ

更新日期：1998-06-01 00:00:00

abstract：:Intermanual interactions are modulated by task requirements in the course of motor preparation. In particular, amplitude coupling is strong when identical amplitudes are specified concurrently for the 2 hands but relaxed when different amplitudes are specified. Similarly, directional coupling is symmetric when symmetr...

journal_title：Journal of motor behavior

authors： Heuer H

更新日期：2006-07-01 00:00:00

abstract：:The speed at which sit-to-stand (STS) motions are performed and the subsequent terminal constraint upon upright stance can present subjects with contradictory goals. Previous findings suggested that subjects might adopt a strategy of limiting the peak horizontal momentum of the center of mass (CM), and perhaps of body...

journal_title：Journal of motor behavior

authors： Pai YC,Lee WA

更新日期：1994-09-01 00:00:00

abstract：:Sensory input can be used by the nervous system to control the spatial parameters of motor responses (e.g., distance, velocity, and direction) by initializing these parameters before movement onset and then by adjusting these parameters during movement. Sensory input can also be used to trigger movements. In the exper...

journal_title：Journal of motor behavior

authors： Cordo PJ,Flanders M

更新日期：1990-03-01 00:00:00

abstract：:Two experiments are reported that examined the act of prehension when subjects were asked to grasp with their thumb and index finger pads an elongated object resting horizontally on a surface and placed at different orientations with respect to the subject. In Experiment 1, the pad opposition preferences were determin...

journal_title：Journal of motor behavior

authors： Stelmach GE,Castiello U,Jeannerod M

更新日期：1994-06-01 00:00:00

abstract：:Human intra limb gait kinematics were analyzed via statistical and structural pattern recognition methods to determine the role of relative timing of limb segments within and between modes of gait. Five experienced runners were filmed while walking (3-6 km/hour) and running (8-12 km/hour) on a motor driven treadmill. ...

journal_title：Journal of motor behavior

authors： Shapiro DC,Zernicke RF,Gregor RJ

更新日期：1981-03-01 00:00:00

abstract：:Two experiments are reported that utilized a task similar to one developed by Pew (1966) in which subjects controlled the position of a continually moving cursor by alternately pressing two response keys. Experiments I and 2 replicated Pew's findings. That is, over acquisition trials, subjects exhibited an increase in...

journal_title：Journal of motor behavior

authors： Kohl RM,Shea CH

更新日期：1992-09-01 00:00:00

abstract：:Individuals are assumed to plan reach-and-grasp movements by using two separate processes. In 1 of the processes, extrinsic (direction, distance) object information is used in planning the movement of the arm that transports the hand to the target location (transport planning); whereas in the other, intrinsic (shape) ...

journal_title：Journal of motor behavior

authors： Loukopoulos LD,Engelbrecht SF,Berthier NE

更新日期：2001-09-01 00:00:00

abstract：:The aim of the present research is to test whether resilience in a motor task enhances or diminishes when encountering stressors. We conducted a lateral movement task during which we induced stressors and tracked the movement accuracy of each participant over time. Stressors corresponded to organismic constraints (i.e...

journal_title：Journal of motor behavior

authors： Hill Y,Van Yperen NW,Den Hartigh RJR

更新日期：2020-11-29 00:00:00

abstract：:The question addressed in the present study was whether subjects (N = 24) can use visual information about their hand, in the first half of an aiming movement, to ensure optimal directional accuracy of their aiming movements. Four groups of subjects practiced an aiming task in either a complete vision condition, a no-...

journal_title：Journal of motor behavior

authors： Temprado JJ,Vieilledent S,Proteau L

更新日期：1996-09-01 00:00:00

abstract：:The authors replicated and extended results from the gunfight paradigm (A. Welchman, J. Stanley, M. Schomers, R. Miall, & H. Bulthoff, 2010a) in which participants moved faster when reacting to the perceived initiation of an opponent compared to initiating an action themselves. In addition to replicating these movemen...

journal_title：Journal of motor behavior

authors： La Delfa NJ,Garcia DB,Cappelletto JA,McDonald AC,Lyons JL,Lee TD

更新日期：2013-01-01 00:00:00

abstract：:Obstacles often appear unexpectedly in our pathway and these require us to make immediate adjustments. Despite how regularly we encounter such situations only few studies have considered how we adjust to unexpected obstacles in the pathway that require us to walk around them. The authors considered how adults adjust t...

journal_title：Journal of motor behavior

authors： Wilmut K,Du W,Barnett AL

更新日期：2017-11-01 00:00:00

abstract：:The effects of practice schedule and amount of practice on the development of the generalized motor program (GMP) and on parameter estimation were investigated. Participants (N = 108) practiced the same relative timing but different absolute durations of a multisegment timing task. Practice schedules (constant, blocke...

journal_title：Journal of motor behavior

authors： Giuffrida Cl,Shea J,Fairbrother JT

更新日期：2002-12-01 00:00:00

abstract：:Reaches, performed by 5 infants, recorded at 19 weeks of age and every third week thereafter until 31 weeks of age, were studied quantitatively. Earlier findings about action units were confirmed. At all ages studied, movements were structured into phases of acceleration and deceleration. Reaching trajectories were fo...

journal_title：Journal of motor behavior

authors： von Hofsten C

更新日期：1991-12-01 00:00:00

abstract：:The authors studied the development of postural adjustments associated with the initiation of gait in children by using kinematic and electromyographic (EMG) analysis. Participants (N = 28) included infants with 1-4 and 9-17 months of walking experience, children 4-5 years of age, and adults. Anticipatory postural adj...

journal_title：Journal of motor behavior

authors： Assaiante C,Woollacott M,Amblard B

更新日期：2000-09-01 00:00:00

abstract：:High variability practice has been found to lead to a higher rate of motor learning than low variability practice in sports tasks. The authors compared the effects of low and high levels of practice variability on a simple unimanual arm rotation task. Participants performed rhythmic unimanual internal-external arm rot...

journal_title：Journal of motor behavior

authors： James EG,Conatser P

更新日期：2014-01-01 00:00:00

abstract：:The authors investigated how the nervous system responds to dual task performance. Because dual tasking is associated with greater postural challenges, it was hypothesized that spinal excitability would be reduced when simultaneously performing 2 tasks. For this experiment, participants maintained a lying or standing ...

journal_title：Journal of motor behavior

authors： Weaver TB,Janzen MR,Adkin AL,Tokuno CD

更新日期：2012-01-01 00:00:00

abstract：:The study of sign languages provides a promising vehicle for investigating language production because the movements of the articulators in sign are directly observable. Movement of the hands and arms is an essential element not only in the lexical structure of American Sign Language (ASL), but most strikingly, in the...

journal_title：Journal of motor behavior

authors： Poizner H,Newkirk D,Bellugi U

更新日期：1983-03-01 00:00:00

abstract：:Two experiments describe the effects of extended practice on the development of motor control programs for simple target-striking responses. In Experiment 1,400 right-hand trials of simple one-target and two-target striking tasks were performed. In Experiment 2,600 practice trials were given. Overall reaction time (RT...

journal_title：Journal of motor behavior

authors： Fischman MG,Lim CH

更新日期：1991-03-01 00:00:00

abstract：:Participants traced two circles simultaneously and the diameter of one circle was scaled as the diameter of the other circle remained constant. When the scaled circle was larger, amplitude error shifted from overshooting to undershooting, while shifting from undershooting to overshooting when this circle was smaller. ...

journal_title：Journal of motor behavior

authors： Buchanan JJ,Ryu YU

更新日期：2012-01-01 00:00:00

abstract：:Several kinesthetic cues may underlie the retention of movements: joint position receptors, muscle stretch receptors, tendon stretch receptors, cutaneous senses, duration of movements, and motor outflow all provide cues. An attempt was made to separate subsets of cues used for movement reproduction by varying the char...

journal_title：Journal of motor behavior

authors： Keele SW,Ells JG

更新日期：1972-09-01 00:00:00

abstract：:High levels of skill displayed in perceptual-motor tasks can only be obtained by accurate timing and anticipation. Recent evidence indicates that task characteristics that change or alter the predictability of stimulus events are potent determiners of performance. The effects of stimulus predictability on timing and a...

journal_title：Journal of motor behavior

authors： Dorfman PW,Goldstein IL

更新日期：1975-03-01 00:00:00

abstract：:Bimanual coordination is an essential human function requiring efficient interhemispheric communication to produce coordinated movements. Previous research suggests a "bimanual advantage" phenomenon, where completing synchronized bimanual tasks results in less variability than unimanual tasks. Additionally, of hand do...

journal_title：Journal of motor behavior

authors： Oswald K,Bo J

更新日期：2019-01-01 00:00:00