Emotional State Impacts Center of Pressure Displacement Before Forward Gait Initiation

2015 ◽  
Vol 31 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Bradley Fawver ◽  
Garrett F. Beatty ◽  
Kelly M. Naugle ◽  
Chris J. Hass ◽  
Christopher M. Janelle
Keyword(s):  
Center Of Pressure ◽  
Emotional Reactions ◽  
Quiet Standing ◽  
Whole Body ◽  
Gait Initiation ◽  
Emotional States ◽  
Body Movements ◽  
Planning Period ◽  
Postural Changes ◽  
The Impact

Emotional states influence whole-body movements during quiet standing, gait initiation, and steady state gait. A notable gap exists, however, in understanding how emotions affect postural changes during the period preceding the execution of planned whole-body movements. The impact of emotion-induced postural reactions on forthcoming posturomotor movements remains unknown. We sought to determine the influence of emotional reactions on center of pressure (COP) displacement before the initiation of forward gait. Participants (N = 23, 14 females) stood on a force plate and initiated forward gait at the offset of an emotional image (representing five discrete categories: attack, sad faces, erotica, happy faces, and neutral objects). COP displacement in the anteroposterior direction was quantified for a 2 second period during image presentation. Following picture onset, participants produced a posterior postural response to all image types. The greatest posterior displacement was occasioned in response to attack or threat stimuli compared with happy faces and erotica images. Results suggest the impact of emotional states on gait behavior begins during the motor planning period before the preparatory phase of gait initiation, and manifests in center of pressure displacement alterations.

scholarly journals Gait Initiation in Community-Dwelling Adults With Parkinson Disease: Comparison With Older and Younger Adults Without the Disease

2002 ◽  
Vol 82 (6) ◽  
pp. 566-577 ◽  
Author(s):  
Matthew Martin ◽  
Mindi Shinberg ◽  
Maggie Kuchibhatla ◽  
Laurie Ray ◽  
James J Carollo ◽  
...  
Keyword(s):  
Postural Control ◽  
Parkinson Disease ◽  
Analysis Of Variance ◽  
Center Of Pressure ◽  
Center Of Mass ◽  
Community Dwelling ◽  
Quiet Standing ◽  
Gait Initiation ◽  
Younger Adults ◽  
Analysis System

Abstract Background and Purpose. Initiation of gait requires transitions from relatively stationary positions to stability with movement and from double- to single-limb stances. These are deliberately destabilizing activities that may be difficult for people with early Parkinson disease (PD), even when they have no problems with level walking. We studied differences in postural stability during gait initiation between participants with early and middle stages of PD (characterized by Hoehn and Yahr as stages 1–3) and 2 other groups of participants without PD—older and younger adults. Subjects. The mean ages of the 3 groups of participants were as follows: subjects with PD, 69.3 years (SD=5.7, range=59–78); older subjects without PD, 69.0 years (SD=3.9, range=65–79); and younger subjects without PD, 27.5 (SD=3.9, range=22–35). Methods. A 3-dimensional motion analysis system was used with 2 force platforms to obtain data for center of mass (COM) and center of pressure (COP). The distance between the vertical projections of the COM and the COP (COM–COP distance) was used to reflect postural control during 5 events in gait initiation. Results. By use of multivariate analysis of variance, differences in COM–COP distance were found among the 3 groups. An analysis of variance indicated differences for 4 of the 5 events in gait initiation. A Scheffe post hoc analysis demonstrated differences in gait initiation between the subjects with PD and both groups of subjects without PD (2 events) and between the subjects with PD and the younger subjects without PD (2 events). Discussion and Conclusion. The COM–COP distance relationship was used to measure postural control during the transition from quiet standing to steady-state gait. Differences between groups indicated that individuals with impaired postural control allow less COM–COP distance than do individuals with no known neurologic problems. The method used could prove useful in the development and assessment of interventions to improve ambulation safety and enhance the independence of people with impaired postural control.

scholarly journals Emotional Reactions and Adaptation to COVID-19 Lockdown (or Confinement) by Spanish Competitive Athletes: Some Lesson for the Future

2021 ◽  
Vol 12 ◽  
Author(s):  
José Carlos Jaenes Sánchez ◽  
David Alarcón Rubio ◽  
Manuel Trujillo ◽  
Rafael Peñaloza Gómez ◽  
Amir Hossien Mehrsafar ◽  
...  
Keyword(s):  
Protective Factors ◽  
Behavioral Problems ◽  
High Performance ◽  
Political Stability ◽  
Well Being ◽  
Emotional Reactions ◽  
Emotional States ◽  
Online Questionnaire ◽  
The World ◽  
The Impact

The Coronavirus Covid 19 (SARS-CoV-2) pandemic has produced terrible effects in the world economy and is shaking social and political stability around the world. The world of sport has obviously been severely affected by the pandemic, as authorities progressively canceled all level of competitions, including the 2020 Olympic Games in Tokyo. In Spain, the initial government-lockdown closed the Sports High-performance Centers, and many other sports facilities. In order to support athlete's health and performance at crises like these, an online questionnaire named RECOVID-19, was designed to assess how athletes were living their lives during such periods of home confinement. The main purpose of the questionnaire was to assess the impact of prolongued confinement on athlete's psychological, emotional, and behavioral performance. One thousand, two hundred forty-eight athletes participated in the survey. They had the fllowing characteristics: (Mean age = 22.31 ± 11.49, Female: 53%), who compete at National (N: 1017, Mean age = 21.58 ± 11.42, Female: 52%) and International level (N: 231, Mean age = 25.56 ± 11.22, Female: 57%). Results showed that during the confinement period, those athletes who lacked motivation reported a higher level of stressful thoughts, more behavioral problems, and greater emotional upheaval (anger, fatigue, tension, and depression). However, those athletes who accepted confinement measures as necessary, and were in favor of respecting the rules of social isolation, fostered positive emotional states such as feelings of friendship. In addition, the availability of some sport equipment together with the ability to continue some training, were (1) protective factors against emotional stress, lack of motivation and behavioral problems; and (2) they were associated with greater respect for, and adherence to, confinement rules. Gender differences, tested by multigroup analysis, revealed that coping activities were more often associated to negative emotional states among women, whereas the ongoing availability of training information and future conditions were equally protective factors for both genders. This study also showed that receiving coaching, support and completing frequent training routines seem to be valuable tools to prevent or reduce some of the harmful effects of isolation on athlete's emotional well-being. The conclusions derived from this research would possibly help sport authorities to design supporting policies and plans to support athletes and trainers in future disruptive health crises.

POSTURAL STEADINESS AFTER PROLONGED STANDING ON DIFFERENT SLOPED SURFACE IN YOUNG HEALTHY ADULTS

2016 ◽  
Vol 28 (01) ◽  
pp. 1650007 ◽  
Author(s):  
Yun-Chung Lin ◽  
Liang-Ching Tsai ◽  
Hsin-Yi Kathy Cheng ◽  
Yang-Hua Lin ◽  
Chih-Hsiu Cheng
Keyword(s):  
Center Of Pressure ◽  
Force Plate ◽  
Surface Current ◽  
Healthy Adults ◽  
Quiet Standing ◽  
Prolonged Standing ◽  
Postural Changes ◽  
Before And After ◽  
Standing Test ◽  
Inclined Surface

Prolonged standing is related to various health problems such as lower back pain and lower extremity discomfort. This study was to investigate the effects of prolonged standing on posture control and whether the sloped surface is beneficial to adults who are required to stand for a long period of time. Twenty young healthy adults (age: [Formula: see text] years, height: [Formula: see text] cm, weight: [Formula: see text] kg, 6 males and 14 females) participated in this study. They were asked to perform a sixty-second quiet-standing evaluation first (i.e. the pre-test condition), then the thirty-minute standing test, and followed by the sixty-second standing test again (i.e. the post-test condition). They stood barefoot quietly on a force plate watching a video on television located 2 m ahead. Three sloped conditions, i.e. the level ground, inclined (with the ankle dorsiflexed), and declined (with the ankle plantarflexed), were randomly examined on separate days. The trajectory, maximal anteroposterior/mediolateral displacement, sway area, and complexity index (CI) of the center of pressure (CoP) during the standing tests were analyzed. Ten-point visual analogue scale (VAS) for perceived fatigue was also recorded. One-way ANOVA and paired t-test were used to analyze postural changes among sloped conditions before and after the prolonged standing. Signs of fatigue (VAS were [Formula: see text], [Formula: see text] and [Formula: see text] for the level, inclined, and declined conditions, respectively) and significant increases in all CoP measures for the three slope conditions after thirty minutes of standing (all [Formula: see text]) were noted. Trajectory was greatest under inclined, followed by the declined and level conditions ([Formula: see text]). The CI was generally greater under the declined surface than the level and inclined surfaces along with the thirty-minute standing. These findings indicated that prolonged standing resulted in fatigue and increased postural changes, particularly on the inclined surface. A greater complexity on the declined surface implied that participants had better adaptability while standing on a declined surface than a flat or inclined surface. Current findings suggested that a declined surface could be a suitable choice for a prolonged standing and further studies are warranted to evaluate its efficacy on different career workers.

The impact of surveillance and procedurally just behavior on civilian affect and responses in hypothetical interactions with police officers

2019 ◽  
Vol 42 (6) ◽  
pp. 1107-1123
Author(s):  
Sean Patrick Roche
Keyword(s):  
Police Officers ◽  
Behavioral Intentions ◽  
Design Methodology ◽  
National Sample ◽  
Emotional Reactions ◽  
Emotional States ◽  
Content Type ◽  
Police Interactions ◽  
The Impact ◽  
The Relationship

Purpose The purpose of this paper is to investigate the impact of surveillance from civilian smartphones and police body-worn cameras (BWCs), procedurally just tactics, and legal culpability on individuals’ emotional reactions and willingness to comply during police interactions. Design/methodology/approach Data are used from two randomized factorial survey vignette experiments conducted with a national sample of Americans (n=962). Findings The presence of BWCs reduces reported fear in both vignettes, and also reduces reported anger in one vignette. In contrast, the presence of a smartphone is not significantly related to anger or fear. In both vignettes, non-procedurally just treatment increases reported fear and anger, and decreases intent to comply, with reported anger mediating the relationship between non-procedurally just treatment and compliance. Originality/value These findings suggest different forms of surveillance may have distinct effects on citizens’ reported emotional states and behavioral intentions. Further, the results corroborate research on the relationship between procedural justice and affect, and provide evidence procedurally just strategies may decrease crime directly by preemptively dampening non-compliance.

scholarly journals The Validity of an Oculus Rift to Assess Postural Changes During Balance Tasks

2019 ◽  
Vol 61 (8) ◽  
pp. 1340-1352 ◽  
Author(s):  
Jonathan Marchetto ◽  
W. Geoffrey Wright
Keyword(s):  
Postural Stability ◽  
Center Of Pressure ◽  
Health Benefit ◽  
Head Position ◽  
Whole Body ◽  
Series Data ◽  
Oculus Rift ◽  
Head Mounted Display ◽  
Somatosensory Information ◽  
Postural Changes

Objective: To investigate whether shifts in head position, measured via an Oculus Rift head-mounted display (HMD), is a valid measure of whole-body postural stability. Background: The inverted single-link pendulum model of balance suggests shifts in whole-body center of mass can be estimated from individual body segments. However, whether head position describes postural stability such as center-of-pressure (COP) remains unclear. Method: Participants ( N = 10) performed six conditions while wearing an HMD and performing a previously validated virtual reality (VR)-based balance assessment. COP was recorded with a Wii Balance Board force plate (WBB), while an HMD recorded linear and angular head displacement. Visual input was presented in the HMD (stable scene, dark scene, or dynamic scene) and somatosensory information (with or without foam) was varied across each condition. The HMD time series data were compared with the criterion-measure WBB. Results: Significant correlations were found between COP measures (standard deviation, range, sway area, velocity) and head-centered angular and linear displacements (roll, pitch, mediolateral and anteroposterior directions). Conclusions: The Oculus Rift HMD shows promise as a measure of postural stability without additional posturography equipment. These findings support the application of VR HMD technology for assessment of postural stability across a variety of challenging conditions. Application: The human factors and ergonomic benefit of such an approach is in its portability, low cost, and widespread availability for clinic and home-based investigation of postural disturbances. Fall injury affects millions of people annually, so assessment of fall risk and treatment of the underlying causes has enormous public health benefit.

Two Kinematic Synergies in Voluntary Whole-Body Movements During Standing

2006 ◽  
Vol 95 (2) ◽  
pp. 636-645 ◽  
Author(s):  
Sandra M.S.F. Freitas ◽  
Marcos Duarte ◽  
Mark L. Latash
Keyword(s):  
Joint Angle ◽  
Center Of Pressure ◽  
Uncontrolled Manifold ◽  
Whole Body ◽  
Joint Angles ◽  
Body Movements ◽  
Uncontrolled Manifold Hypothesis ◽  
Kinematic Synergies ◽  
Trunk Orientation ◽  
Speed Accuracy

We used a particular computational approach, the uncontrolled manifold hypothesis, to investigate joint angle covariation patterns during whole-body actions performed by standing persons. We hypothesized that two kinematic synergies accounted for the leg/trunk joint covariation across cycles during a rhythmic whole-body motion to stabilize two performance variables, the trunk orientation in the external space and the horizontal position of the center of mass (COM). Subjects stood on a force plate and performed whole-body rhythmic movements for 45 s under visual feedback on one of the four variables, the position of the center of pressure or the angle in one of the three joints (ankle, knee, or hip). The Fitts-like paradigm was used with two target amplitudes and six indices of difficulty (ID) for each of the four variables. This was done to explore the robustness of kinematic postural synergies. A speed-accuracy trade-off was observed in all feedback conditions such that the movement time scaled with ID and the scaling differed between the two movement amplitudes. Principal-component (PC) analysis showed the existence of a single PC in the joint space that accounted for over 95% of the joint angle variance. Analysis within the uncontrolled manifold hypothesis has shown that data distributions in the joint angle space were compatible with stabilization of both trunk orientation and COM location. We conclude that trunk orientation and the COM location are stabilized by co-varied changes of the major joint angles during whole-body movements. Despite the strong effects of movement amplitude and ID on performance, the structure of the joint variance showed only minor dependence on these task parameters. The two kinematic synergies (co-varied changes in the joint angles that stabilized the COM location and trunk orientation) have proven to be robust over a variety of tasks.

The influence of thermoplastic thoraco lumbo sacral orthoses on standing balance in subjects with idiopathic scoliosis

2015 ◽  
Vol 40 (4) ◽  
pp. 460-466 ◽  
Author(s):  
Minoo Khanal ◽  
Mokhtar Arazpour ◽  
Mahmood Bahramizadeh ◽  
Mohammad Samadian ◽  
Stephen W Hutchins ◽  
...  
Keyword(s):  
Idiopathic Scoliosis ◽  
Healthy Subjects ◽  
Center Of Pressure ◽  
Center Of Gravity ◽  
Quiet Standing ◽  
Balance Performance ◽  
Lateral Direction ◽  
Test Conditions ◽  
Postural Changes

Background: Idiopathic scoliosis patients have postural equilibrium problems. Objective: The objective of this study was to assess postural control in subjects with idiopathic scoliosis following a 4-month intervention in an unbraced position. Study design: Quasi-experimental. Methods: Eight healthy girls and eight girls with idiopathic scoliosis took part. A Kistler force platform was used with a frequency of 100 Hz for recording data. The center of pressure was recorded in different positions out of brace for scoliosis and healthy subjects. Test conditions were single limb and double limb stance, with eyes open and closed, and foam and rigid surfaces. Results: The data reflected a weak balance of idiopathic scoliosis subjects compared to healthy subjects. After 1 and 4 months of wearing the brace, center of pressure and center of gravity sway increased in the majority of the tests, although there were no significant differences in any of the test conditions (p > 0.05). While the center of pressure sway in medio-lateral direction decreased after 4 months of wearing a brace, in other variables center of pressure and center of gravity sway increased. Conclusion: Idiopathic scoliosis patients have weak balance in comparison to healthy subjects. In addition, following a period of 4 months of wearing a brace, balance parameters in the scoliosis subjects did not improve. The results show that we need more follow-up of orthoses wearing in idiopathic scoliosis subjects and suggest more studies at least 1-year follow-up to identify the efficiency of brace wear on balance. Clinical relevance Scoliosis can alter postural stability and balance performance during quiet standing. Spinal deformity can alter a subject’s ability to compensate for postural changes and cause gait deviations. This study investigated balance differences between the healthy and idiopathic scoliosis patients and the results of thoraco lumbo sacral orthosis brace wear. It might provide some new insight into the conservative treatment of idiopathic scoliosis patients for clinicians and researchers.

The Therapist’s Reaction to a Patient’s Suicide

Crisis ◽  
2011 ◽  
Vol 32 (2) ◽  
pp. 99-105 ◽  
Author(s):  
Friedrich Martin Wurst ◽  
Isabella Kunz ◽  
Gregory Skipper ◽  
Manfred Wolfersdorf ◽  
Karl H. Beine ◽  
...  
Keyword(s):  
Emotional Responses ◽  
Well Being ◽  
Emotional Reaction ◽  
Emotional Reactions ◽  
Analog Scale ◽  
General Hospitals ◽  
Item Questionnaire ◽  
Retrospective Nature ◽  
The Impact ◽  
Over Time

Background: A substantial proportion of therapists experience the loss of a patient to suicide at some point during their professional life. Aims: To assess (1) the impact of a patient’s suicide on therapists distress and well-being over time, (2) which factors contribute to the reaction, and (3) which subgroup might need special interventions in the aftermath of suicide. Methods: A 63-item questionnaire was sent to all 185 Psychiatric Clinics at General Hospitals in Germany. The emotional reaction of therapists to patient’s suicide was measured immediately, after 2 weeks, and after 6 months. Results: Three out of ten therapists suffer from severe distress after a patients’ suicide. The item “overall distress” immediately after the suicide predicts emotional reactions and changes in behavior. The emotional responses immediately after the suicide explained 43.5% of the variance of total distress in a regression analysis. Limitations: The retrospective nature of the study is its primary limitation. Conclusions: Our data suggest that identifying the severely distressed subgroup could be done using a visual analog scale for overall distress. As a consequence, more specific and intensified help could be provided to these professionals.

Emotional Reactivity to Visual Content as Revealed by ERP Component Clustering

2015 ◽  
Vol 29 (4) ◽  
pp. 135-146 ◽  
Author(s):  
Miroslaw Wyczesany ◽  
Szczepan J. Grzybowski ◽  
Jan Kaiser
Keyword(s):  
Emotional Reactivity ◽  
Brain Activity ◽  
Affective State ◽  
Occipital Lobe ◽  
Stimulus Onset ◽  
Emotional States ◽  
Neural Basis ◽  
Temporoparietal Junction ◽  
The Right ◽  
The Impact

Abstract. In the study, the neural basis of emotional reactivity was investigated. Reactivity was operationalized as the impact of emotional pictures on the self-reported ongoing affective state. It was used to divide the subjects into high- and low-responders groups. Independent sources of brain activity were identified, localized with the DIPFIT method, and clustered across subjects to analyse the visual evoked potentials to affective pictures. Four of the identified clusters revealed effects of reactivity. The earliest two started about 120 ms from the stimulus onset and were located in the occipital lobe and the right temporoparietal junction. Another two with a latency of 200 ms were found in the orbitofrontal and the right dorsolateral cortices. Additionally, differences in pre-stimulus alpha level over the visual cortex were observed between the groups. The attentional modulation of perceptual processes is proposed as an early source of emotional reactivity, which forms an automatic mechanism of affective control. The role of top-down processes in affective appraisal and, finally, the experience of ongoing emotional states is also discussed.

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