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J Therm Biol ; 92: 102659, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32888563

RESUMEN

INTRODUCTION: This study assessed the influence of High (H, 4.13%), Medium (M, 2.0%) and Low (L, 0.1%) doses of menthol on temperature perception and regulation, compared to a Placebo Condition (P). METHOD: Sixteen participants underwent the aforementioned conditions on four separate days. During each test participants rested supine (Environmental conditions: 30 °C, 50% rh) for 30-min before 40 mL of L, M, H or P gel was applied to the anterior upper body, then rested 30-min thereafter. Primary measures included thermal sensation (TS), thermal comfort (TC), irritation (IRR), rectal temperature (Tre), and skin temperature (chest, forearm, thigh, calf), and EMG (trapezius, pectoralis major, sternocleidomastoid). The area under the curve (AUC) from minute 30 to 60 was compared between conditions using relevant non/parametric tests (alpha level = 0.05). RESULTS: A cooling trend in Tre was observed following Placebo gel application, but this significantly (p < 0.05) reversed into a heat storage response in M and H. Both TS and TC significantly differed by condition (p < 0.001) in a dose-dependent manner, with L, M, and H doses eliciting significantly cooler sensations and more discomfort than P (p < 0.05). Irritation significantly differed by condition (p < 0.01) in a dose-dependent manner, with L and M eliciting significantly greater irritation than P (p < 0.01). No other differences were observed. CONCLUSIONS: Menthol exerts perceptual and thermoregulatory effects independent of skin temperature. A menthol dose-dependent perceptual cooling effect was evident with possible saturation at the moderate dose. A dose-dependent alteration in deep body temperature was also evident.


Asunto(s)
Antipruriginosos/farmacología , Regulación de la Temperatura Corporal/efectos de los fármacos , Mentol/farmacología , Sensación Térmica/efectos de los fármacos , Adulto , Femenino , Humanos , Masculino , Percepción/efectos de los fármacos , Temperatura Cutánea/efectos de los fármacos , Adulto Joven
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