Search results for "movement control"
showing 8 items of 8 documents
Intercepting real and simulated falling objects: what is the difference?
2009
International audience; The use of virtual reality is nowadays common in many studies in the field of human perception and movement control, particularly in interceptive actions. However, the ecological validity of the simulation is often taken for granted without having been formally established. If participants were to perceive the real situation and its virtual equivalent in a different fashion, the generalization of the results obtained in virtual reality to real life would be highly questionable. We tested the ecological validity of virtual reality in this context by comparing the timing of interceptive actions based upon actually falling objects and their simulated counterparts. The r…
A dynamic adjustment model of saccade lengths in reading for word-spaced orthographies : evidence from simulations and invisible boundary experiments
2021
Contemporary models of eye movement control in reading assume a discrete target word selection process preceding saccade length computation, while the selection itself is assumed to be driven by word identification processes. However, a potentially more parsimonious, dynamic adjustment view allows both next word length and its content (e.g. orthographic) to modulate saccade length in a continuous manner. Based on a recently proposed center-based saccade length account (a new regression model of forward saccade length is introduced and validated in a simulation study. Further, additional simulations and gaze-contingent invisible boundary experiments were used to study the cognitive mechanism…
Processing Information During Regressions: An Application of the Reverse Boundary-Change Paradigm.
2018
Although 10-15% of eye-movements during reading are regressions, we still know little about the information that is processed during regressive episodes. Here, we report an eye-movement study that uses what we call the "reverse boundary change technique" to examine the processing of lexical-semantic information during regressions, and to establish the role of this information during recovery from processing difficulty. In the critical condition of the experiment, an initially implausible sentence (e.g. "There was an old house that John had ridden when he was a boy.") was rendered plausible by changing a context word ("house") to a lexical neighbour ("horse") using a gaze-contingent display …
Prevention of injuries among youth team sports : the role of decreased movement control as a risk factor
2017
Good movement control is essential in team sports that require fast-paced running, pivoting, jumping and landing. Alterations in dynamic neuromuscular control may cause significant stress on the musculoskeletal system, and increase the risk of both acute and overuse injuries. The purpose of this dissertation was to investigate the effectiveness of interventions to prevent sports injuries, the incidence and severity of overuse injuries, and the role of decreased movement control as a risk factor for future injuries in young team sports athletes. The study methods included a systematic literature review and meta-analysis of randomized controlled trials, a retrospective epidemiological investi…
Physical exercise adherence in Finnish children using a music mat: a pilot study
2020
A growing number of studies has shown that informal musical activities, such as singing, playing an instrument, and musical play at home, are positively associated with children’s health. This paper examines the associations between fourteen 4–6-year-old children’s and their parents’ exercise activity, children’s musical and their exercise adherence when using a music mat over an eight-week period in the home environment. Our results show that most of the children moved on the mat breezily and briskly. The parents assessed that exercises required balance and movement control more than endurance or strength. Spearman’s rank-order correlation showed a strong, positive correlation between the …
THE ANALYSIS OF BODY BALANCE IN A PARALYMPIC SPRINTER: A CASE REPORT
2011
Introduction Trans-tibial amputation is responsible for biomechanical changes (i.e. absence of muscles, bones and joints) and modifications in both afferent and efferent projections. Because of these impairments, body balance is difficult to control and falls are a significant problem for trans-tibial amputees (Curtze et al., 2010). The aim of our study was to evaluate whether specific exercises can improve body balance in a paralympic sprinter (category: T-44) after 7 weeks of training. Methods The athlete was a healthy and active female subject (age: 37 years; weight: 58.2 Kg; height: 161cm; BMI: 22.45) with an unilateral transtibial amputation to 1/3 of the right lower limb since the age…
Inter-and intra-tester reliability of a battery of cervical movement control dysfunction tests
2015
Abstract Background Apart from the cranio-cervical flexion test and the deep neck flexor endurance test, evidence related to reliability of cervical movement control dysfunction tests is lacking. Objectives This study investigated the inter- and intra-tester reliability of a battery of cervical movement control dysfunction tests and the effect of clinician experience on reliability in 15 patients with chronic neck pain and 17 non-neck pain controls. In addition, it explored whether impaired performance on this battery of tests was more frequently observed in the neck pain group. Design Inter and intra-tester reliability study. Method Participants were videotaped while performing a battery o…
Musculoskeletal examination in young athletes and non-athletes:the Finnish Health Promoting Sports Club (FHPSC) study
2018
ObjectivesTo determine the inter-rater repeatability of a musculoskeletal examination and to compare findings between adolescent athletes and non-athletes in Finland.MethodsIn this cross-sectional study, a musculoskeletal examination assessing posture, mobility and movement control was carried out by a sports and exercise medicine physician on 399 athletes aged 14–17 years and 177 non-athletes. Within 2 weeks another sports and exercise medicine physician repeated the examination for 41 adolescents to test the inter-rater repeatability.ResultsIn total, 10 of the 11 tests performed had at least moderate inter-rater reliability (κ ≥0.4 or percentage agreement >80%). Athletes more often tha…