TY - JOUR
T1 - Effects of a mental task on splanchnic blood flow in fasting and postprandial conditions
AU - Someya, Nami
AU - Endo, Masako Yamaoka
AU - Fukuba, Yoshiyuki
AU - Hirooka, Yoshitaka
AU - Hayashi, Naoyuki
N1 - Funding Information:
Acknowledgments The authors thank the Danone Institute of Japan (DIJ) for Wnancial support (2006 DIJ Research Grant to N. Hayashi). This work was also supported by a Grant-in-Aid for JSPS Fellows (No. 20-5223 to N. Someya).
PY - 2010/4
Y1 - 2010/4
N2 - We tested the hypothesis that a mental task attenuates the meal-induced vasodilation in the splanchnic vasculature. Ten subjects performed a 5-min colour-word conflict test (CWT) under fasting and postprandial conditions. Subjects in the postprandial condition had ingested solid food with an energy content of 300 kcal (1,255 kJ) before either performing the CWT (mental task trial) or resting (resting control trial). The mean blood velocities (MBV) in the coeliac artery (CA) and superior mesenteric artery (SMA), and the mean arterial pressure (MAP) were measured. The MBV in the CA and SMA were divided by the MAP to assess the vascular conductance (VC). The MBV in the CA and SMA were significantly increased by the CWT under fasting conditions. In the postprandial condition, the MBV in the CA and SMA significantly increased immediately after the meal in both the mental task and resting control trials. The VC in the SMA, but not in the CA, was significantly decreased by the CWT under fasting conditions. In the postprandial conditions, there was no significant difference in the VC in both arteries between mental task and resting control trials. These results suggest that a mental task exerts different effects on the CA and SMA under fasting but not postprandial condition. The vasoconstrictive effect of a mental task on the SMA does not counter the vasodilatory effect of meal ingestion.
AB - We tested the hypothesis that a mental task attenuates the meal-induced vasodilation in the splanchnic vasculature. Ten subjects performed a 5-min colour-word conflict test (CWT) under fasting and postprandial conditions. Subjects in the postprandial condition had ingested solid food with an energy content of 300 kcal (1,255 kJ) before either performing the CWT (mental task trial) or resting (resting control trial). The mean blood velocities (MBV) in the coeliac artery (CA) and superior mesenteric artery (SMA), and the mean arterial pressure (MAP) were measured. The MBV in the CA and SMA were divided by the MAP to assess the vascular conductance (VC). The MBV in the CA and SMA were significantly increased by the CWT under fasting conditions. In the postprandial condition, the MBV in the CA and SMA significantly increased immediately after the meal in both the mental task and resting control trials. The VC in the SMA, but not in the CA, was significantly decreased by the CWT under fasting conditions. In the postprandial conditions, there was no significant difference in the VC in both arteries between mental task and resting control trials. These results suggest that a mental task exerts different effects on the CA and SMA under fasting but not postprandial condition. The vasoconstrictive effect of a mental task on the SMA does not counter the vasodilatory effect of meal ingestion.
KW - Coeliac artery
KW - Mental stress
KW - Postprandial
KW - Superior mesenteric artery
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U2 - 10.1007/s00421-009-1316-y
DO - 10.1007/s00421-009-1316-y
M3 - Article
C2 - 20024578
AN - SCOPUS:77951092120
SN - 1439-6319
VL - 108
SP - 1107
EP - 1113
JO - European Journal of Applied Physiology
JF - European Journal of Applied Physiology
IS - 6
ER -
