Stubbing D G, Ramsdale E H, Killian K J, Campbell E J
J Appl Physiol Respir Environ Exerc Physiol. 1983 May;54(5):1216-21. doi: 10.1152/jappl.1983.54.5.1216.
The perceived magnitude of static inspiratory muscle pressure was studied in normal subjects using psychophysical techniques. The sensory magnitude of a range of inspiratory pressures increased as the magnitude of the pressure increased. When the duration of the inspiratory pressure was controlled, the sensory magnitude also increased as duration increased. The relationship can be described by a single psychophysical function, psi = k x P1.234 x t0.62, where psi is perceived magnitude, P is inspiratory pressure, t is duration, and k is a constant. Use of different muscle groups and changes in lung volume altered the perceived magnitude of static inspiratory pressures. When static inspiratory pressures were generated by the abdomen-diaphragm, the perceived magnitude was significantly greater (P less than 0.01) than when they were generated by the rib cage. When lung volume was increased, the perceived magnitude of pressure was reduced. The results show that the perceived magnitude of static inspiratory pressures is affected by the pressure itself, pressure duration, the muscles used, and the lung volume at which the pressure is generated.
采用心理物理学技术对正常受试者静息吸气肌压力的感知强度进行了研究。随着吸气压力幅度的增加，一系列吸气压力的感觉强度也增加。当吸气压力的持续时间得到控制时，感觉强度也随着持续时间的增加而增加。这种关系可用单一的心理物理学函数来描述，即ψ = k×P1.234×t0.62，其中ψ为感知强度，P为吸气压力，t为持续时间，k为常数。使用不同的肌肉群以及肺容积的变化会改变静息吸气压力的感知强度。当由腹部 - 膈肌产生静息吸气压力时，其感知强度显著大于（P < 0.01）由胸廓产生时的感知强度。当肺容积增加时，压力的感知强度降低。结果表明，静息吸气压力的感知强度受压力本身、压力持续时间、所使用的肌肉以及产生压力时的肺容积影响。
