Ikuo Yokoyama

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Hypercapnia and hypocapnia produce cerebral vasodilation and vasoconstriction, respectively. However, regional differences in the vascular response to changes in Paco2 in the human brain are not pronounced. In the current study, these regional differences were evaluated. In each of the 11 healthy subjects, cerebral blood flow (CBF) was measured using(More)
UNLABELLED Skeletal muscle glucose utilization (SMGU) can be measured by dynamic PET imaging with (18)F-FDG to characterize insulin resistance. The aim of this study was to determine the validity of simple methods to quantify SMGU by static PET imaging. METHODS Ten patients underwent dynamic (18)F-FDG PET of the femoral region during hyperinsulinemic(More)
Intravenous dipyridamole increases the concentration of circulating adenosine and produces coronary vasodilation. However, it decreases global cerebral blood flow (CBF) due to hyperventilation side effect of adenosine. In the present study, changes in regional CBF during dipyridamole stress were identified in detail. In 11 healthy men (51-71 years of age),(More)
To accurately determine the intraneural topography at each level of the brachial plexus, the funicular pattern of the brachial plexus in 10 Japanese adult cadavers was investigated by microdissection and an intraneural topographic map at different levels of the brachial plexus was prepared. It was possible to identify the intraneural location of funiculi(More)
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