scholarly journals An estimate of adenosine triphosphate release into the venous effluent from exercising human forearm muscle

1972 ◽  
Vol 224 (3) ◽  
pp. 611-628 ◽  
Author(s):  
T. Forrester
Keyword(s):  
Adenosine Triphosphate ◽  
Human Forearm ◽  
Forearm Muscle

Interactions between local and reflex influences on human forearm skin blood flow

1976 ◽  
Vol 41 (6) ◽  
pp. 826-831 ◽  
Author(s):  
J. M. Johnson ◽  
G. L. Brengelmann ◽  
L. B. Rowell
Keyword(s):  
Blood Flow ◽  
Skin Blood Flow ◽  
Forearm Blood Flow ◽  
Lower Body Negative Pressure ◽  
Muscle Blood Flow ◽  
Whole Body ◽  
Vasoconstrictor Response ◽  
Human Forearm ◽  
Forearm Skin ◽  
Forearm Muscle

A three-part experiment was designed to examine interactions between local and reflex influences on forearm skin blood flow (SkBF). In part I locally increasing arm skin temperature (Tsk) to 42.5 degrees C was not associated with increases in underlying forearm muscle blood flow, esophageal temperature (Tes), or forearm blood flow in the contralateral cool arm. In part II whole-body Tsk was held at 38 or 40 degrees C and the surface temperature of one arm held at 38 or 42 degrees C for prolonged periods. SkBF in the heated arm rose rapidly with the elevation in body Tsk and arm Tsk continued to rise as Tes rose. SkBF in the arm kept at 32 degrees C paralleled rising Tes. In six studies, SkBF in the cool arm ultimately converged with SkBF in the heated arm. In eight other studies, heated arm SkBF maintained an offset above cool arm SkBF throughout the period of whole-body heating. In part III, local arm Tsk of 42.5 degrees C did not abolish skin vasoconstrictor response to lower body negative pressure. We conclude that local and reflex influences to skin interact so as to modify the degree but not the pattern of skin vasomotor response.

In Vivo functioning of creatine phosphokinase in human forearm muscle, studied by31P NMR saturation transfer

1989 ◽  
Vol 9 (1) ◽  
pp. 39-52 ◽  
Author(s):  
Deborah Rees ◽  
Michael B. Smith ◽  
Judith Harley ◽  
George K. Radda
Keyword(s):  
Creatine Phosphokinase ◽  
Saturation Transfer ◽  
Human Forearm ◽  
Forearm Muscle

DYNAMICS OF ATP, PCr, AND Pi DURING EXERCISE AND RECOVERY IN HUMAN FOREARM MUSCLE

1980 ◽  
Vol 21 (Supplement) ◽  
pp. S68
Author(s):  
D. J. McCann ◽  
P. A. Molé ◽  
J. R. Caton
Keyword(s):  
Human Forearm ◽  
Forearm Muscle

Effects of epinephrine on human muscle glucose and protein metabolism

1995 ◽  
Vol 268 (1) ◽  
pp. E55-E59 ◽  
Author(s):  
D. A. Fryburg ◽  
R. A. Gelfand ◽  
L. A. Jahn ◽  
D. Oliveras ◽  
R. S. Sherwin ◽  
...  
Keyword(s):  
Plasma Insulin ◽  
Forearm Blood Flow ◽  
Muscle Protein ◽  
Human Muscle ◽  
Whole Body ◽  
Epinephrine Infusion ◽  
Healthy Human ◽  
Human Volunteers ◽  
Human Forearm ◽  
Forearm Muscle

Systemic epinephrine infusion causes hypoaminoacidemia and inhibits whole body leucine flux (proteolysis) in humans. Its specific action on muscle protein is not known and is difficult to assess during systemic epinephrine infusions, which affect plasma insulin, amino acid, and free fatty acid concentrations. During a steady-state infusion of L-[ring-2,6-3H]phenylalanine, we examined the effect of locally infused epinephrine on the metabolism of protein and glucose in forearm muscle of 10 healthy human volunteers. During local epinephrine infusion, systemic concentrations of glucose, phenylalanine, insulin, and epinephrine were unchanged and lactate declined (P < 0.02). Compared with baseline, epinephrine induced significant increases in forearm blood flow (P < 0.01) and net lactate release (P < 0.001) and a decrease in glucose uptake (P < 0.01) at both 2 and 4 h. At 2 and 4 h phenylalanine release from muscle proteolysis was suppressed (P < 0.01), and at 4 h the net phenylalanine balance was less negative than baseline (P < 0.02), indicating an anticatabolic effect on muscle protein. We conclude that in human forearm muscle epinephrine, at physiological concentrations, has a catabolic effect on muscle glycogen but an anticatabolic action on muscle protein. The mechanism of this latter effect is not known.

Response of human forearm muscle blood vessels to hyperventilation

1971 ◽  
Vol 5 (3) ◽  
pp. 347-352 ◽  
Author(s):  
R. C. Jung ◽  
J. A. Walsh ◽  
C. Hyman
Keyword(s):  
Blood Vessels ◽  
Human Forearm ◽  
Forearm Muscle
Sign in / Sign up

Export Citation Format

Share Document