Adjustment of the cerebral and peripheral blood flow dynamics at the pre-stroke stage

2019 ◽  
Author(s):  
Olga Pavlova ◽  
Arkady Abdurashitov ◽  
Yasir Mohammad ◽  
Oxana Semyachkina-Glushkovskaya ◽  
Alexey N. Pavlov
Keyword(s):  
Blood Flow ◽  
Peripheral Blood ◽  
Flow Dynamics ◽  
Peripheral Blood Flow ◽  
Blood Flow Dynamics

scholarly journals Nephron blood flow dynamics measured by laser speckle contrast imaging

2011 ◽  
Vol 300 (2) ◽  
pp. F319-F329 ◽  
Author(s):  
Niels-Henrik Holstein-Rathlou ◽  
Olga V. Sosnovtseva ◽  
Alexey N. Pavlov ◽  
William A. Cupples ◽  
Charlotte Mehlin Sorensen ◽  
...  
Keyword(s):  
Blood Flow ◽  
Signal Transmission ◽  
Experimental Studies ◽  
Flow Dynamics ◽  
Laser Speckle ◽  
Tubuloglomerular Feedback ◽  
Contrast Imaging ◽  
Laser Speckle Contrast Imaging ◽  
Speckle Contrast ◽  
Blood Flow Dynamics

Tubuloglomerular feedback (TGF) has an important role in autoregulation of renal blood flow and glomerular filtration rate (GFR). Because of the characteristics of signal transmission in the feedback loop, the TGF undergoes self-sustained oscillations in single-nephron blood flow, GFR, and tubular pressure and flow. Nephrons interact by exchanging electrical signals conducted electrotonically through cells of the vascular wall, leading to synchronization of the TGF-mediated oscillations. Experimental studies of these interactions have been limited to observations on two or at most three nephrons simultaneously. The interacting nephron fields are likely to be more extensive. We have turned to laser speckle contrast imaging to measure the blood flow dynamics of 50–100 nephrons simultaneously on the renal surface of anesthetized rats. We report the application of this method and describe analytic techniques for extracting the desired data and for examining them for evidence of nephron synchronization. Synchronized TGF oscillations were detected in pairs or triplets of nephrons. The amplitude and the frequency of the oscillations changed with time, as did the patterns of synchronization. Synchronization may take place among nephrons not immediately adjacent on the surface of the kidney.

Muscle Blood-Flow Dynamics at Exercise Onset

2006 ◽  
Vol 38 (10) ◽  
pp. 1811-1818 ◽  
Author(s):  
MICHAEL E. TSCHAKOVSKY ◽  
NATASHA R. SAUNDERS ◽  
KATHERINE A. WEBB ◽  
DENIS E. O'DONNELL
Keyword(s):  
Blood Flow ◽  
Muscle Blood Flow ◽  
Flow Dynamics ◽  
Exercise Onset ◽  
Blood Flow Dynamics

scholarly journals Effects of haemorrhage on the distribution of the peripheral blood flow in the rabbit

1967 ◽  
Vol 192 (2) ◽  
pp. 561-574 ◽  
Author(s):  
J. P. Chalmers ◽  
P. I. Korner ◽  
S. W. White
Keyword(s):  
Blood Flow ◽  
Peripheral Blood ◽  
Peripheral Blood Flow

scholarly journals Distribution of Splanchnic and Peripheral Blood Flow During Acute Reduction in Circulatory Rate

1961 ◽  
Vol 153 (4) ◽  
pp. 477-482 ◽  
Author(s):  
MURRAY N. ANDERSEN ◽  
GORAN HAMBRAEUS ◽  
GUY A. ALFANO ◽  
WORTHINGTON G. SCHENK
Keyword(s):  
Blood Flow ◽  
Peripheral Blood ◽  
Peripheral Blood Flow
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