Log rated tickle/bubbles vs. log concentration, by anatomical site and atmospheric pressure.

<p>Error bars represent ±S.E.M. Lines are linear fits from least squares regression: 1) For tongue sensation at 1 atm, log(Intensity) = 2.04[log(Concentration)] - 0.18, R² = 0.82; 2) for tongue sensation at 2 atm, log(I) = 2.16[log(C)] - 0.14, R² = 0.89; 3) for throat sensation at 1 atm, log(I) = 2.08[log (C)] - 0.24, R² = 0.96; 4) For throat sensation at 2 atm, log(I) = 2.00[log(C)] - 0.07, R² = 0.98.