Breathing changes accompanying balance improvement during biofeedback

Hirjaková, Zuzana; Neumannová, Kateřina; Kimijanová, Jana; Šuttová, Kristína; Janura, Miroslav; Hlavačka, F

doi:10.1016/j.neulet.2017.04.051

Cited by 9 publications

(7 citation statements)

References 23 publications

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“…our previous work (Hirjaková et al, 2017) and the research associating the low frequencies with contribution of visual information to body sway, medium frequencies to vestibular and somatosensory, and high frequencies to proprioceptive information (Golomer et al, 1994;Nagy et al, 2004). Similar frequency bands were recently used, e.g., by Johnson et al (2019) and Zaback et al (2019Zaback et al ( , 2021 to explore the threatrelated postural adaptations.…”

Section: Postural Measures and Signal Processingmentioning

confidence: 93%

“…During the measurements, the participants were asked to fixate a selected object placed at a distance of 5 m at eye level within the urban VR environment (the same for all participants) to ensure a standard visual input from the simulated scene. The duration of each epoch of postural data acquisition was 50 s. The postural responses were quantified by the displacement of the centre of foot pressure (CoP) measured by a custom-made force plate (45 cm × 45 cm × 6.5 cm), equipped with an automatic weight correction (for more details, see Hirjaková et al, 2017 ). Prior to the trials of the stage VH1 , data were collected at virtual height 0 m while participants were standing on a firm support.…”

Section: Methodsmentioning

confidence: 99%

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The Effects of Virtual Height Exposure on Postural Control and Psychophysiological Stress Are Moderated by Individual Height Intolerance

Bzdúšková

Marko

Hirjaková

et al. 2022

Front. Hum. Neurosci.

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Virtual reality (VR) enables individuals to be exposed to naturalistic environments in laboratory settings, offering new possibilities for research in human neuroscience and treatment of mental disorders. We used VR to study psychological, autonomic and postural reactions to heights in individuals with varying intensity of fear of heights. Study participants (N = 42) were immersed in a VR of an unprotected open-air elevator platform in an urban area, while standing on an unstable ground. Virtual elevation of the platform (up to 40 m above the ground level) elicited robust and reliable psychophysiological activation including increased distress, heart rate, and electrodermal activity, which was higher in individuals suffering from fear of heights. In these individuals, compared with individuals with low fear of heights, the VR height exposure resulted in higher velocity of postural movements as well as decreased low-frequency (<0.5 Hz) and increased high-frequency (>1 Hz) body sway oscillations. This indicates that individuals with strong fear of heights react to heights with maladaptive rigidity of posture due to increased weight of visual input for balance control, while the visual information is less reliable at heights. Our findings show that exposure to height in a naturalistic VR environment elicits a complex reaction involving correlated changes of the emotional state, autonomic activity, and postural balance, which are exaggerated in individuals with fear of heights.

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Section: Postural Measures and Signal Processingmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

The Effects of Virtual Height Exposure on Postural Control and Psychophysiological Stress Are Moderated by Individual Height Intolerance

Bzdúšková

Marko

Hirjaková

et al. 2022

Front. Hum. Neurosci.

Self Cite

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“…At higher muscle activity levels (similar to what is expected from standing on a compliant surface [22]), the participants' movements were more reliant on hip and mixed strategies [25]. When concurrent visual feedback of center of pressure was used by young healthy adults, center of pressure deviations decreased, whereas the frequencies increased [10,43]. dos Anjos et al [10] attributed the accompanying decrease in ankle angle deviations and increase in ankle angle deviation frequency to an overall increase in ankle stiffness, though they noted that a hip strategy could have been present as well.…”

Section: Discussionmentioning

confidence: 83%

Effects of Concurrent and Terminal Visual Feedback on Ankle Co-Contraction in Older Adults during Standing Balance

Vitali

Barone

Ferris

et al. 2021

Sensors

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This preliminary investigation studied the effects of concurrent and terminal visual feedback during a standing balance task on ankle co-contraction, which was accomplished via surface electromyography of an agonist–antagonist muscle pair (medial gastrocnemius and tibialis anterior muscles). Two complementary mathematical definitions of co-contraction indices captured changes in ankle muscle recruitment and modulation strategies. Nineteen healthy older adults received both feedback types in a randomized order. Following an analysis of co-contraction index reliability as a function of surface electromyography normalization technique, linear mixed-effects regression analyses revealed participants learned or utilized different ankle co-contraction recruitment (i.e., relative muscle pair activity magnitudes) and modulation (i.e., absolute muscle pair activity magnitudes) strategies depending on feedback type and following the cessation of feedback use. Ankle co-contraction modulation increased when concurrent feedback was used and significantly decreased when concurrent feedback was removed. Ankle co-contraction recruitment and modulation did not significantly change when terminal feedback was used or when it was removed. Neither ankle co-contraction recruitment nor modulation was significantly different when concurrent feedback was used compared to when terminal feedback was used. The changes in ankle co-contraction recruitment and modulation were significantly different when concurrent feedback was removed as compared to when terminal feedback was removed. Finally, this study found a significant interaction between feedback type, removal of feedback, and order of use of feedback type. These results have implications for the design of balance training technologies using visual feedback.

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“…Gait was initiated from an upright standing on a custom-made force plate (45 × 45 × 6.5 cm; see details in Hirjaková et al, 2017 ), in-built and located at the beginning of a 5-m walkway. Postural responses were quantified by CoP displacement in the AP direction because changes induced by the vibratory stimulation were also expected in this direction.…”

Section: Methodsmentioning

confidence: 99%

Age-Related Changes of the Anticipatory Postural Adjustments During Gait Initiation Preceded by Vibration of Lower Leg Muscles

Kimijanová

Bzdúšková

Hirjaková

et al. 2021

Front. Hum. Neurosci.

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Gait initiation (GI) challenges the balance control system, especially in the elderly. To date, however, there is no consensus about the age effect on the anticipatory postural adjustments (APAs). There is also a lack of research on APAs in older adults after proprioceptive perturbation in the sagittal plane. This study aimed to compare the ability of young and older participants to generate APAs in response to the vibratory-induced perturbation delivered immediately before GI. Twenty-two young and 22 older adults performed a series of GI trials: (1) without previous vibration; (2) preceded by the vibration of triceps surae muscles; and (3) preceded by the vibration of tibialis anterior muscles. The APAs magnitude, velocity, time-to-peak, and duration were extracted from the center of pressure displacement in the sagittal plane. Young participants significantly modified their APAs during GI, whereas older adults did not markedly change their APAs when the body vertical was shifted neither backward nor forward. Significant age-related declines in APAs were observed also regardless of the altered proprioception.The results show that young adults actively responded to the altered proprioception from lower leg muscles and sensitively scaled APAs according to the actual position of the body verticality. Contrary, older adults were unable to adjust their postural responses indicating that the challenging transition from standing to walking probably requires higher reliance on the visual input. The understanding of age-related differences in APAs may help to design training programs for the elderly specifically targeted to improve balance control in different sensory conditions, particularly during gait initiation.

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Breathing changes accompanying balance improvement during biofeedback

Cited by 9 publications

References 23 publications

The Effects of Virtual Height Exposure on Postural Control and Psychophysiological Stress Are Moderated by Individual Height Intolerance

The Effects of Virtual Height Exposure on Postural Control and Psychophysiological Stress Are Moderated by Individual Height Intolerance

Effects of Concurrent and Terminal Visual Feedback on Ankle Co-Contraction in Older Adults during Standing Balance

Age-Related Changes of the Anticipatory Postural Adjustments During Gait Initiation Preceded by Vibration of Lower Leg Muscles

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