Dj. Green et al., EFFECT OF CASTING ON FOREARM RESISTANCE VESSELS IN YOUNG MEN, Medicine and science in sports and exercise, 29(10), 1997, pp. 1325-1331
The aim of this study was to determine whether physical deconditioning
, induced by 6 wk of forearm casting, and the conditioning effects of
recovery from casting would elicit changes in the response of forearm
resistance vessels to substances that modulate vascular resistance. Fo
rearm brood flow (FBF) responses to intrabrachial infusion of N(G)mono
methyl-L-arginine (LNMMA) and norepinephrine (NE) were examined in six
subjects recovering from Colles', scaphoid, or metacarpal fractures w
ithin 72 h of cast removal and again after a 6-wk recovery period. Vas
cular responses were also examined in six noncasted controls. The FBF
responses of casted and control subjects did not differ, and no change
s occurred over the 6-wk study period. These results suggest that the
effect of forearm casting and recovery from casting do not greatly inf
luence control of vascular tone, including the basal activity of the N
O dilator system in vivo.