scholarly journals Analysis of Physiological Responses to a Social Situation in an Immersive Virtual Environment

2006 ◽  
Vol 15 (5) ◽  
pp. 553-569 ◽  
Author(s):  
Mel Slater ◽  
Christoph Guger ◽  
Guenter Edlinger ◽  
Robert Leeb ◽  
Gert Pfurtscheller ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Virtual Environment ◽  
Physiological Responses ◽  
Social Situation ◽  
Experimental Phase ◽  
Virtual Character ◽  
Socially Anxious ◽  
Virtual Characters ◽  
Skin Response

An experiment was conducted in a Cave-like environment to explore the relationship between physiological responses and breaks in presence and utterances by virtual characters towards the participants. Twenty people explored a virtual environment (VE) that depicted a virtual bar scenario. The experiment was divided into a training and an experimental phase. During the experimental phase breaks in presence (BIPs) in the form of whiteouts of the VE scenario were induced for 2 s at four equally spaced times during the approximately 5 min in the bar scenario. Additionally, five virtual characters addressed remarks to the subjects. Physiological measures including electrocardiagram (ECG) and galvanic skin response (GSR) were recorded throughout the whole experiment. The heart rate, the heart rate variability, and the event-related heart rate changes were calculated from the acquired ECG data. The frequency response of the GSR signal was calculated with a wavelet analysis. The study shows that the heart rate and heart rate variability parameters vary significantly between the training and experimental phase. GSR parameters and event-related heart rate changes show the occurrence of breaks in presence. Event-related heart rate changes also signified the virtual character utterances. There were also differences in response between participants who report more or less socially anxious.

Assessment of Autonomic Responses to Different Driving and Road Conditions

2000 ◽  
Vol 44 (37) ◽  
pp. 679-679
Author(s):  
Byung-Chan Min ◽  
Soon-Cheol Chung ◽  
Sang-Gyun Kim ◽  
Byung-Woon Min ◽  
Chul-Jung Kim ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Skin Temperature ◽  
Galvanic Skin Response ◽  
Physiological Responses ◽  
Mean Value ◽  
Autonomic Responses ◽  
Skin Response ◽  
Curved Road

The purpose of this study was to compare changes in autonomic responses due to different driving and road conditions. We measured physiological responses of the 10 health subjects such as Heart Rate Variability (HRV), Galvanic Skin Response (GSR) and skin temperature in rest and stimulation conditions. The ratio of LF/HF significantly increased and averaged R-R interval decreased on the abrupt stopping and starting and abruptly curved road conditions, compared to other conditions. Mean value of GSR increased and mean value of skin temperature decreased in the abrupt stopping and starting and abruptly curved road conditions, compared to other conditions.

scholarly journals Behavioral and Physiological Differences between Working Horses and Chilean Rodeo Horses in a Handling Test

Animals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 397 ◽  
Author(s):  
Paula Rosselot ◽  
Tiago Mendonça ◽  
Igor González ◽  
Tamara Tadich
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Physiological Responses ◽  
Group Differences ◽  
Monitor System ◽  
The Novel ◽  
Non Invasive ◽  
Lower Variability ◽  
Variability Data ◽  
Selection Of

Non-invasive measures are preferred when assessing animal welfare. Differences in behavioral and physiological responses toward a stressor could be the result of the selection of horses for specific uses. Behavioral and physiological responses of working and Chilean rodeo horses subjected to a handling test were assessed. Five behaviors, number of attempts, and the time to cross a bridge were video recorded and analyzed with the Observer XT software. Heart rate (HR) and heart rate variability (HRV), to assess the physiological response to the novel stimulus, were registered with a Polar Equine V800 heart rate monitor system during rest and the bridge test. Heart rate variability data were obtained with the Kubios software. Differences between working and Chilean rodeo horses were assessed, and within-group differences between rest and the test were also analyzed. Chilean rodeo horses presented more proactive behaviors and required significantly more attempts to cross the bridge than working horses. Physiologically, Chilean rodeo horses presented lower variability of the heart rate than working horses.

scholarly journals Sympathetic Skin Response and Heart Rate Variability in Patients With Huntington Disease

1999 ◽  
Vol 56 (10) ◽  
pp. 1248 ◽  
Author(s):  
Khema R. Sharma ◽  
Jose G. Romano ◽  
D. Ram Ayyar ◽  
Francisco T. Rotta ◽  
Alicia Facca ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Huntington Disease ◽  
Sympathetic Skin Response ◽  
Skin Response

Differential heart rate variability and physiological responses associated with accumulated short- and long-term stress in rodents

2017 ◽  
Vol 171 ◽  
pp. 21-31 ◽  
Author(s):  
Sunghee E. Park ◽  
Dajeong Park ◽  
Kang-Il Song ◽  
Joon-Kyung Seong ◽  
Seok Chung ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Physiological Responses ◽  
Short And Long Term

scholarly journals Psychophysiology of slow breathing exercises using heart rate variability measurements for stress reduction

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Dante Jr. Guanlao Simbulan
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Respiratory Rate ◽  
Stress Reduction ◽  
Tai Chi ◽  
Chronically Ill ◽  
Positive Sign ◽  
Breathing Exercises ◽  
Skin Response ◽  
Slow Breathing

Slow breathing exercises, associated with meditation and other eastern style modalities like tai chi and hatha yoga, are now increasingly employed in mainstream medicine to reduce stress, attenuate moderate hypertension, and alleviate symptoms of lifestyle-related illnesses. The clinical literature on slow breathing exercises includes studies employing various physiological measurements, including heart rate variability (HRV), galvanic skin response, and changes in skin temperature. HRV has been increasingly used to measure the activity of the autonomic nervous system in various human studies employing healthy and chronically ill subjects. 1. Objective: To understand the effects of slow breathing exercises on heart rate variability as a complementary intervention for stress reduction. 2. Method: Four subjects, through repetitive trials, were instructed to slow down their breathing following a metronome at 10 breaths per minute or 6 breaths per minute or spontaneously relax to slow down their respiratory rate. The ECG, heart rate, and respiratory rate were recorded using a Powerlab set-up (ADI). 3. Key Results:  Results showed an increase in amplitude of heart rate variability during these slow breathing exercises, either through the metronome-guided or spontaneous slow-breathing exercises, especially around a breathing frequency of 6 breaths per minute. The increased amplitude of heart rate variability can be seen as a positive sign, a marker for sympathovagal balance. 4. Conclusion: HRV measurements have shown that slow breathing exercises can increase heart rate variability.  Future protocols for clinical trials are being projected using the HRV technique and other physiological measurements for studying effects of yoga-based complementary interventions for stress reduction.

scholarly journals Evaluation of Autonomic Nervous System in Children With Cerebral Palsy: Clinical and Electophysiological Study

2021 ◽  
Author(s):  
Hanan Galal Azouz ◽  
Ali M Abdel Mohsen ◽  
Rana M Mohamed ◽  
hayam mostafa abdelghany
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Cerebral Palsy ◽  
Autonomic Dysfunction ◽  
Sympathetic Skin Response ◽  
Spastic Cerebral Palsy ◽  
Control Group ◽  
Healthy Children ◽  
Children With Cerebral Palsy ◽  
Skin Response

Abstract Cerebral palsy (CP) is the most prevalent severe motor disability among children. The aim of this work was to assess autonomic dysfunction in children with cerebral palsy clinically and electrophysiologically .The study was carried out on forty children with cerebral palsy their age ranged from 4-12 years and twenty healthy children with matched age and sex as control group. CP children were subjected to questionnaire for autonomic dysfunction symptoms. Both CP children and Control group were assessed for Sympathetic Skin Response and Heart rate variability. Most of children had quadriplegic spastic cerebral palsy (82.5%). Based on Gross motor function classification system (GMFCS) classification the majority of children were in levels 4 and 5. The prevalence of autonomic dysfunction symptoms was 80% for thermoregulatory abnormalities (cold extremities), chronic constipation 65%, sleep disturbance 52.5%, loss of appetite 47.5%, sweating abnormalities 40% , recurrent nausea and/or vomiting 25%, increased sensitivity to light or dark 22.5% and bloating 15%. The percentage of unelicited Sympathetic skin response in CP children was 47.5% and 60% in upper limbs and lower limbs respectively, all of them were in level 4 and 5 of GMFCS. 20% of CP children had postural hypotension. Mean Heart rate of CP children was significantly increased more than healthy children upon head tilt test. Sympathetic Skin Response and Heart rate variability were proven to be simple and non invasive procedures in investigating autonomic dysfunction in CP children.

Psychomotor Efficiency in Golf: The Role of Physiological Responses on Putting Performance

Biofeedback ◽  
2021 ◽  
Vol 49 (3) ◽  
pp. 77-80
Author(s):  
Edson Filho ◽  
André Aroni ◽  
Guilherme Bagni ◽  
Jean Rettig ◽  
Jodie Ellis
Keyword(s):  
Heart Rate ◽  
Respiration Rate ◽  
Galvanic Skin Response ◽  
Performance Enhancement ◽  
Physiological Responses ◽  
High Achievers ◽  
Optimal Functioning ◽  
Skin Response ◽  
Psychomotor Efficiency ◽  
The Individual

Putting is paramount to performance in golf and differentiates low and high achievers in the sport. In the present study, we compared the heart rate, respiration rate, and galvanic skin response for missed and holed putts performed by 13 skilled male golfers from a 12-ft (3.65-m) distance. Contrary to our expectations, no significant effects were observed for heart rate and respiration rate, likely because skilled athletes (a) engage in preperformance routines and are able to control their breathing rhythms, which in turn influence their heart rate; and (b) physiological responses are idiosyncratic, akin to the Individual Zones of Optimal Functioning framework. Congruent with our expectations, we observed a significant effect for galvanic skin response, with higher values observed for missed putts. This effect was robust to individual differences and suggests that biofeedback interventions aimed at enhancing awareness of autonomous physiological responses can be beneficial for performance enhancement in golf putting.

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