Plasma catecholamine levels during temperature biofeedback training in normal subjects

1993 ◽  
Vol 18 (2) ◽  
pp. 107-114 ◽  
Author(s):  
Robert R. Freedman ◽  
Denise Keegan ◽  
Janice Rodriguez ◽  
Matthew P. Galloway
Keyword(s):  
Normal Subjects ◽  
Biofeedback Training ◽  
Plasma Catecholamine ◽  
Temperature Biofeedback ◽  
Catecholamine Levels

The Distribution of Catecholamines between Platelets and Plasma in Normal Human Subjects

1985 ◽  
Vol 69 (1) ◽  
pp. 1-6 ◽  
Author(s):  
C. C. T. Smith ◽  
L. D. Curtis ◽  
A. P. Delamothe ◽  
B. N. C. Prichard ◽  
D. J. Betteridge
Keyword(s):  
High Performance ◽  
Human Subjects ◽  
Normal Subjects ◽  
Plasma Noradrenaline ◽  
Plasma Catecholamine ◽  
Noradrenaline Content ◽  
Platelet Factor ◽  
Normal Human ◽  
Catecholamine Levels

1. We have used high-performance liquid chromatography with electrochemical detection to measure content of adrenaline and noradrenaline in platelets in 13 normal subjects at rest. 2. Subjects were exercised to raise plasma catecholamine levels and promote the platelet release reaction. 3. There was a significant positive correlation between plasma noradrenaline concentrations and platelet noradrenaline content. 4. Platelet/plasma concentration ratios were 1855 for noradrenaline and 268 for adrenaline at rest and 473 and 152 respectively after exercise. 5. Plasma noradrenaline levels positively correlated with age. 6. Determination of platelet factors released to the plasma showed increases of β-thromboglobulin and platelet factor 4 with exercise, whereas thromboxane B2 remained unchanged. No change in platelet catecholamine levels occurred with exercise and no correlations were observed between platelet catecholamines and released platelet factors. 7. These data suggest that plasma catecholamine levels influence platelet content and that noradrenaline and adrenaline are concentrated in platelets.

Plasma Catecholamine Levels and Vascular Response in Deoxycorticosterone Acetate Hypertension of Rats

1980 ◽  
Vol 59 (s6) ◽  
pp. 315s-317s ◽  
Author(s):  
W. Rascher ◽  
R. Dietz ◽  
A. Schomig ◽  
J. Weber ◽  
F. Gross
Keyword(s):  
Hind Limb ◽  
Vascular Tone ◽  
Plasma Concentrations ◽  
Plasma Catecholamine ◽  
Vascular Response ◽  
Deoxycorticosterone Acetate ◽  
Pronounced Increase ◽  
Basal Plasma ◽  
Noradrenaline And Adrenaline ◽  
Catecholamine Levels

1. In rats with deoxycorticosterone acetate (DOCA) hypertension basal plasma concentrations of noradrenaline and adrenaline correspond to those of sham-treated controls. 2. In DOCA-treated rats frusemide caused a more pronounced increase in plasma noradrenaline than in control rats. This difference was not observed for adrenaline. 3. In the isolated perfused hind-limb preparation the sensitivity to noradrenaline was already enhanced before blood pressure was elevated. 4. These results suggest that the adrenergic vascular tone is increased in DOCA hypertension in rats.

Administration of docosahexaenoic acid influences behavior and plasma catecholamine levels at times of psychological stress

Lipids ◽  
1999 ◽  
Vol 34 (S1) ◽  
pp. S33-S37 ◽  
Author(s):  
Tomohito Hamazaki ◽  
Shigeki Sawazaki ◽  
Tetsuro Nagasawa ◽  
Yoko Nagao ◽  
Yuko Kanagawa ◽  
...  
Keyword(s):  
Docosahexaenoic Acid ◽  
Psychological Stress ◽  
Plasma Catecholamine ◽  
Catecholamine Levels

Activation of central GABAA receptors suppresses the alteration of plasma catecholamine levels induced by neostigmine or histamine in rats

Life Sciences ◽  
1994 ◽  
Vol 55 (21) ◽  
pp. PL409-PL413 ◽  
Author(s):  
Katsunori Nonogaki ◽  
Kotomi Mizuno ◽  
Nobuo Sakamoto ◽  
Akihisa Iguchi
Keyword(s):  
Gabaa Receptors ◽  
Plasma Catecholamine ◽  
Catecholamine Levels

Temperature Biofeedback Training to Improve Peripheral Blood Flow in the Upper Extremities of Diabetic Patients

1984 ◽  
Vol 51 (5) ◽  
pp. 219-224 ◽  
Author(s):  
Elizabeth Dean
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Diastolic Blood Pressure ◽  
Peripheral Blood ◽  
Diabetic Group ◽  
Biofeedback Training ◽  
Control Group ◽  
Diabetic Patients ◽  
Peripheral Blood Flow ◽  
Temperature Biofeedback

Ten control and ten diabetic subjects were first given a baseline session of no temperature biofeedback, and then were exposed to four 40-minute temperature biofeedback sessions over consecutive days. As the result of feedback training, peripheral skin temperatures increased on the training (right) hands of both groups, and this occurred to a greater extent in the diabetic group. Concomitant temperature increases occurred also in the left hands of both groups. Neither group produced any significant changes in heart rate, respiration rate, or systolic blood pressure with the exception of a significant decrease in diastolic blood pressure for the diabetic group. No difference in diastolic blood pressure was observed, however, when the diabetics were compared with the control group. The results would suggest further evaluation of temperature biofeedback training is warranted in a diabetic population as a potential means of increasing peripheral blood flow in the extremities.

THE EFFECTS OF ACCLIMATION TEMPERATURE ON THE DYNAMICS OF CATECHOLAMINE RELEASE DURING ACUTE HYPOXIA IN THE RAINBOW TROUT ONCORHYNCHUS MYKISS

1994 ◽  
Vol 186 (1) ◽  
pp. 289-307 ◽  
Author(s):  
S. Perry ◽  
S. Reid
Keyword(s):  
Rainbow Trout ◽  
Acute Hypoxia ◽  
Catecholamine Release ◽  
Acclimation Temperature ◽  
Plasma Catecholamine ◽  
Blood Oxygen ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Arterial Blood ◽  
The Difference ◽  
Catecholamine Levels

The response of cannulated rainbow trout (Oncorhynchus mykiss) to acute hypoxia was studied in fish acclimated to two temperatures (5 and 15 °C). Blood/water respiratory variables and plasma catecholamine levels were measured before and 15 min after exposure to hypoxic water varying between 4.0 and 10.7 kPa (30–80 mmHg) oxygen partial pressure (PwO2). Arterial blood PO2 (PaO2) and oxygen content (CaO2) fell during hypoxia in a similar manner at both temperatures, although the changes in CaO2 were often more pronounced in the fish acclimated to 15 °C. Regardless of acclimation temperature, plasma catecholamine levels were consistently elevated at PwO2 values below 8.0 kPa (60 mmHg); the largest increases in plasma catecholamine levels occurred below PwO2=5.3 kPa (40 mmHg). Adrenaline was the predominant catecholamine released into the circulation. Adrenaline was released at PwO2 values of 8.0 kPa or below, whereas noradrenaline was released at PwO2 values of 6.7 kPa or below. The construction of in vivo oxygen dissociation curves demonstrated an obvious effect of acclimation temperature on haemoglobin (Hb) oxygen-affinity; the P50 values at 15 °C and 5 °C were 3.6 kPa (26.7 mmHg) and 1.9 kPa (14.0 mmHg), respectively. At 15 °C, catecholamines were released into the circulation abruptly at a PaO2 threshold of 4.6 kPa (34.5 mmHg) while at 5 °C the catecholamine release threshold was lowered to 3.3 kPa (24.5 mmHg). The difference in the PaO2 catecholamine release thresholds was roughly equivalent to the difference in the P50 values at the two distinct temperatures. Catecholamine release thresholds, calculated on the basis of arterial blood oxygen-saturation (expressed as CaO2/[Hb]), were similar at both temperatures and were approximately equal to 53–55 % Hb O2-saturation. The results support the contention that the lowering of blood oxygen content/saturation rather than PO2 per se is the proximate stimulus/signal causing catecholamine release in rainbow trout during acute hypoxia.

scholarly journals No modulation of postprandial metabolism by transcutaneous auricular vagus nerve stimulation: a cross-over study in 15 healthy men

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Andreas Vosseler ◽  
Dongxing Zhao ◽  
Louise Fritsche ◽  
Rainer Lehmann ◽  
Konstantinos Kantartzis ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Vagus Nerve Stimulation ◽  
Glucose Tolerance Test ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Plasma Catecholamine ◽  
Oral Glucose Tolerance ◽  
Catecholamine Levels

AbstractExperimental evidence suggests a crucial role of the autonomic nervous system in whole body metabolism with major regulatory effects of the parasympathetic branch in postprandial adaptation. However, the relative contribution of this mechanism is still not fully clear in humans. We therefore compared the effects of transcutaneous auricular vagus nerve stimulation (taVNS, Cerbomed Nemos) with sham stimulation during an oral glucose tolerance test in a randomized, single-blind, cross-over design in 15 healthy lean men. Stimulation was performed for 150 min, 30 min before and during the entire oral glucose tolerance test with stimulation cycles of 30 s of on-phase and 30 s of off-phase and a 25 Hz impulse. Heart rate variability and plasma catecholamine levels were assessed as proxies of autonomic tone in the periphery. Neither analyzed heart rate variability parameters nor plasma catecholamine levels were significantly different between the two conditions. Plasma glucose, insulin sensitivity and insulin secretion were also comparable between conditions. Thus, the applied taVNS device or protocol was unable to achieve significant effects on autonomic innervation in peripheral organs. Accordingly, glucose metabolism remained unaltered. Therefore, alternative approaches are necessary to investigate the importance of the autonomic nervous system in postprandial human metabolism.

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