Abstract

To investigate the each role of chewing and taste in the control of splanchnic blood flow, which reportedly increased at initial phase of meal, we compared the blood flow responses in celiac artery (CA) to chewing of solid meal (MEAL, with chocolate taste) and paraffin wax (WAX, without taste). After five minutes of baseline measurement, twelve healthy subjects repeated chewing and expectorating the MEAL or WAX for 4 minutes followed by 10 minutes of recovery measurement. We measured blood velocity (BV) in CA and masseteric electromyogram (EMG). The BV in CA at the baseline and the masseteric EMG during chewing were not different between MEAL and WAX trials. The BV in CA significantly decreased at the 1st minute of chewing from the baseline in both trials. In the MEAL trial the BV in CA significantly increased at the 3rd minute of chewing from the baseline, whereas in the WAX trial the BV in CA returned to the baseline value. The BV in CA was significantly higher in the MEAL trial than the WAX trial at the 3rd minute of and after chewing. These results suggest that the taste of food plays a role in meal‐induced splanchnic hyperemia.

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