Accentuated antagonism in the control of human heart rate

2000 ◽  
Vol 10 (3) ◽  
pp. 107-110 ◽  
Author(s):  
Sebastian H. J. Uijtdehaage ◽  
Julian F. Thayer
Keyword(s):  
Heart Rate ◽  
Human Heart

Human heart-rate operant conditioning with free versus controlled respiration

1971 ◽  
Author(s):  
D. H. VanDercar ◽  
Neal E. Miller ◽  
Jay M. Weiss ◽  
Henry Solomon
Keyword(s):  
Heart Rate ◽  
Operant Conditioning ◽  
Human Heart

Individual typological profiles for human heart rate under local cold and hypoxic exposures

2004 ◽  
Vol 29 (7-8) ◽  
pp. 809-813 ◽  
Author(s):  
Arkady L. Maximov ◽  
Natalia N. Maximova
Keyword(s):  
Heart Rate ◽  
Human Heart

scholarly journals Critical Scale Invariance in a Healthy Human Heart Rate

2004 ◽  
Vol 93 (17) ◽  
Author(s):  
Ken Kiyono ◽  
Zbigniew R. Struzik ◽  
Naoko Aoyagi ◽  
Seiichiro Sakata ◽  
Junichiro Hayano ◽  
...  
Keyword(s):  
Heart Rate ◽  
Scale Invariance ◽  
Human Heart ◽  
Healthy Human ◽  
Critical Scale

Respiratory sinus arrhythmia in the denervated human heart

1989 ◽  
Vol 67 (4) ◽  
pp. 1447-1455 ◽  
Author(s):  
L. Bernardi ◽  
F. Keller ◽  
M. Sanders ◽  
P. S. Reddy ◽  
B. Griffith ◽  
...  
Keyword(s):  
Heart Rate ◽  
Respiratory Sinus Arrhythmia ◽  
Human Heart ◽  
Normal Subjects ◽  
Respiratory Frequency ◽  
Autonomic Tone ◽  
Sinus Arrhythmia ◽  
Transplant Patients ◽  
Myocardial Wall ◽  
Analysis Technique

We performed this study to test whether the denervated human heart has the ability to manifest respiratory sinus arrhythmia (RSA). With the use of a highly sensitive spectral analysis technique (cross correlation) to define beat-to-beat coupling between respiratory frequency and heart rate period (R-R) and hence RSA, we compared the effects of patterned breathing at defined respiratory frequency and tidal volumes (VT), Valsalva and Mueller maneuvers, single deep breaths, and unpatterned spontaneous breathing on RSA in 12 normal volunteers and 8 cardiac allograft transplant recipients. In normal subjects R-R changes closely followed changes in respiratory frequency (P less than 0.001) but were little affected by changes in VT. On the R-R spectrum, an oscillation peak synchronous with respiration was found in heart transplant patients. However, the average magnitude of the respiration-related oscillations was 1.7–7.9% that seen in normal subjects and was proportionally more influenced by changes in VT. Changes in R-R induced by Valsalva and Mueller maneuvers were 3.8 and 4.9% of those seen in normal subjects, respectively, whereas changes in R-R induced by single deep breaths were 14.3% of those seen in normal subjects. The magnitude of RSA was not related to time since the heart transplantation, neither was it related to patient age or sex. Thus the heart has the intrinsic ability to vary heart rate in synchrony with ventilation, consistent with the hypothesis that changes, or rate of changes, in myocardial wall stretch might alter intrinsic heart rate independent of autonomic tone.

scholarly journals Relation between Conditioned Stimulus-Elicit Responses and Unconditioned Response Diminution in Long-Interval Human Heart-Rate Classical Conditioning

2001 ◽  
Vol 4 (1) ◽  
pp. 11-18 ◽  
Author(s):  
José L. Marcos ◽  
Jaime Redondo
Keyword(s):  
Heart Rate ◽  
Classical Conditioning ◽  
Conditioned Response ◽  
Human Heart ◽  
Neutral Stimulus ◽  
Unconditioned Response ◽  
Heart Rate Deceleration ◽  
The Us ◽  
Geometrical Shapes ◽  
Rate Deceleration

Previous research on electrodermal conditioning suggests that the conditioned diminution of the unconditioned response (UR) has an associative basis. The aim of this experiment was to test whether this phenomenon also occurs in heart rate (HR) classical conditioning. For this purpose, a differential classical conditioning was performed. The conditioned stimuli (CSs) were geometrical shapes (the CS+ was a square and the CS− was a triangle) displayed on a computer screen and a burst of white noise was used as unconditioned stimulus (US). For analysis of the conditioned response (CR) components, an interval between CS+ and US of 8 seconds was used. After the acquisition phase, participants were tested using trials with the US preceded either by a CS+, a CS−, or a neutral stimulus (a circle). The results showed conditioned diminution of the UR and suggest that the second heart rate deceleration component (D2) is responsible for the occurrence of this phenomenon.

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