Arterial baroreflex modulation influences postural sway

Bernardi, Luciano; Bissa, Monica; Debarbieri, G.; Bharadwaj, Abhishek; Nicotra, Alessia

doi:10.1007/s10286-010-0099-x

Cited by 7 publications

(9 citation statements)

References 28 publications

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“…Although the precise neural pathway has not been established , recent work by Bernardi et al . demonstrated that carotid baroreflex modulation influences postural sway .…”

Section: Physical Counterpressure Manoeuvresmentioning

confidence: 99%

“…Along these lines, Amberson [22] suggested the possibility of a connection between arterial baroreceptors and skeletal muscle tone, which could serve to increase muscle tensing during orthostasis. Although the precise neural pathway has not been established [2], recent work by Bernardi et al demonstrated that carotid baroreflex modulation influences postural sway [23].…”

Section: Muscle Tensingmentioning

confidence: 99%

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Physical countermeasures to increase orthostatic tolerance

et al. 2014

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“…Although the precise neural pathway has not been established , recent work by Bernardi et al . demonstrated that carotid baroreflex modulation influences postural sway .…”

Section: Physical Counterpressure Manoeuvresmentioning

confidence: 99%

Section: Muscle Tensingmentioning

confidence: 99%

Physical countermeasures to increase orthostatic tolerance

et al. 2014

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“…Previous studies have shown that changes in cardiovascular autonomic control by arterial baroreceptor function manipulation may affect stance (7) and motor function by inhibiting spinal reflexes (36). On the other hand, activation of ergoreceptor associated fibers by the working muscle during gait results in profound changes in cardiovascular neural control, namely, an overall increase in cardiovascular sympathetic outflow (37).…”

Section: Cardiovascular Autonomic Changes After Mechanical Stimulatiomentioning

confidence: 99%

“…There is evidence of a functional interaction among neural somatosensory activation, and of motor and cardiovascular autonomic control both in health and disease. Indeed, the rhythmic perturbation of carotid baroreceptor afferents in healthy volunteers results in synchronous oscillations of postural sway (7). Also, the activation of plantar sensory afferents by electrical stimulation increases the arterial baroreflex sensitivity in patients with heart failure (17).…”

mentioning

confidence: 99%

Effects of mechanical stimulation of the feet on gait and cardiovascular autonomic control in Parkinson's disease

Barbic

Galli

Vecchia

et al. 2014

Journal of Applied Physiology

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Motor impairment in Parkinson's disease (PD) is partly due to defective central processing of lower limb afferents. Concomitant alterations in cardiovascular autonomic control leading to orthostatic hypotension may worsen motor ability. We evaluated whether mechanical activation of feet sensory afferents could improve gait and modify the response of cardiovascular autonomic control to stressors in 16 patients (age 66 ± 2 yr) with idiopathic PD (Hoehn & Yhar scale 2-3) on their usual therapy. Eight subjects (group A) were randomized to undergo skin pressure (0.58 ± 0.04 kg/mm(2)) stimulation at the hallux tip and first metatarsal joint (effective stimulation; ES) of both feet. Eight remaining patients (group B) underwent sham stimulation (SS) followed by ES. Three-dimensional movement analysis provided quantitative indexes of movement disability before (baseline) and 24 h after ES and SS. Spectral analysis of heart rate and blood pressure variability provided markers of cardiac sympatho-vagal (LF/HF) and vascular sympathetic (LFSAP) modulations. Markers were measured at rest and during 75° head-up tilt, before and 24 h after ES and SS. After ES, step length and gait velocity increased, upright rotation velocity was enhanced, and step number was decreased. After ES, LFSAP declined. The increase in LF/HF and LFSAP induced by tilt was greater than before feet stimulation. No changes in gait and autonomic parameters were observed after SS. Twenty-four hours after ES, patients with PD showed improved gait and increased cardiac and vascular sympathetic modulation during upright position compared with baseline. Conversely, SS was ineffective on both movement and autonomic parameters, indicating a site specificity effect of the stimulation.

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“…Pressure fluctuations could be another cause of perturbation of quiet standing. Further support to the hypothesis that the sympathetic nervous system modulates postural sway is provided by a recent study (Bernardi, Bissa, De Barbieri, Bharadwaj, & Nicotra, 2011) that relies on phasic stimulation of the carotid baroceptors to demonstrate the influence of the autonomic nervous system on posture. Since the issue of the influence of the autonomic nervous system in balance could play an important role, further research is needed to fully understand the interrelations between autonomic activity and posture.…”

Section: Discussionmentioning

confidence: 90%

Circular Components in Center of Pressure Signals

Agostini¹,

Chiaramello²,

Knaflitz³

2013

Motor Control

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Static posturography provides an objective assessment of postural control by characterizing the body sway during upright standing. The center of pressure (COP) signal is recorded by a force platform, and it is analyzed by means of many different models and techniques. Most of the parameters calculated according to these different approaches are affected by relevant intra- and intersubject variability or do not have a clear physiological interpretation. Traditional approaches decompose the COP signal into anteroposterior and mediolateral time series, corresponding to ankle plantar/dorsiflexion and hip adduction/abduction, respectively. In this study we hypothesized that COP signals show inherent rotational characteristics. To verify our hypothesis we applied the rotary spectra analysis to the two-dimensional COP signal to decompose it into clockwise and counterclockwise rotational components. We demonstrated the presence of rotational components in the COP signal of healthy subjects, providing a reference data set of the spectral characteristics of these components.

show abstract

Arterial baroreflex modulation influences postural sway

Cited by 7 publications

References 28 publications

Physical countermeasures to increase orthostatic tolerance

Physical countermeasures to increase orthostatic tolerance

Effects of mechanical stimulation of the feet on gait and cardiovascular autonomic control in Parkinson's disease

Circular Components in Center of Pressure Signals

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