1982) Kinaesthetic role of muscle afferents in man, studied by tendon vibration and microneurography
For many years, several techniques have been developed for the assessment of ANS: (a) dosage of plasmatic and urinary catecholamines (Goldstein 1983), which nowadays is not considered as a highly reliable index of sympathetic activity (Montano 2009), (b) muscle sympathetic nerve activity (MSNA), a direct but invasive recording of sympathetic activity using a microneurography
technique (Wallin 2007), (c) analysis of HRV, a non-invasive tool able to provide reliable information on the sympathetic and parasympathetic oscillations of the heart period and arterial pressure time series, (d) more recent non-linear approaches based on entropy-derived measures and symbolic analysis of heart period time series.
2001), by means of the microneurography
of the peroneal nerve, and high levels of circulating catecholamines found in these patients as observed by La Rovere et al.
has made recording of single Ad-fibre and C fibre activity possible, and provides a direct method for measuring sympathetic activity.
However, without sufficient physiological evidence from receptor isolation techniques, such as microneurography
, the possibility of an increase in the discharge of these receptors cannot be discounted.
11) recorded muscle sympathetic activity with microneurography
in patients with FM.
Strikingly, OSA patients continue to have repetitive bursts of sympathetic activity and increased sympathetic activity even during the day (9), as demonstrated by microneurography
and elevated catecholamine levels both in plasma and urine.
The researchers used a technique called microneurography
to examine a group of healthy subjects.
Leah Bent is one of few researchers in Canada with an expertise in microneurography
Their blood pressure, heart rate, and muscle sympathetic nerve activity as recorded by peroneal microneurography
were measured before and after repeated 4-minute mental stress tests.
Muscle sympathetic nerve activity was obtained via microneurography, as described previously (Tamisier et al.
Tan from the Cardiovascular Research Laboratory (Harvard Medical School, Boston, USA) for his help with microneurography data analysis.