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Mental task induces differential vascular responses in the brain, viscera, skin, and forearm
Author(s) -
Hayashi Naoyuki,
Someya Nami,
Hirooka Yoshitaka,
Fukuba Yoshiyuki
Publication year - 2007
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.21.5.a475-c
Subject(s) - forearm , blood flow , sma* , medicine , heart rate , blood pressure , analysis of variance , mean arterial pressure , hemodynamics , cardiology , anatomy , anesthesia , mathematics , combinatorics
We investigated blood flow responses in midcerebral (MCA), celiac (CA) and superior mesenteric (SMA) arteries, and forearm and fingerskin vasculatures. In seven subjects, mean arterial pressure (MAP), heart rate (HR) and blood flow variables were measured before, during and after Stroop color word test (CWT), which lasted for five minutes. Obtained data except for the MCA blood velocity was calculated minute‐by‐minute, and MCA blood flow was calculated every 15 s. ANOVA demonstrated that the MAP and HR significantly rose during CWT (75 ±3 vs. 89±6 mmHg; 57±3 vs. 69±7 bpm, at peak, p<0.05). CWT significantly decreased the forearm and skin blood flow (peak response; −37±9 %, −28±13 % from baseline in forearm and finger skin at the 3rd min), whereas it significantly increased blood velocity in the CA (37±3 vs. 47±6 cm/s at peak), and in the MCA during the initial 15 s of CWT from baseline (53 ±3 vs. 56±4 cm/s). There was no significant change in SMA blood velocity. These findings indicate differential vascular responses during mental tasks in humans. (JSPS #17700496 to NH and #18207019 to YF)