173-182 284 HOUSE_OVERSIGHT_013784 Sammon, M.P., Bruce, E.H. (1991) Vagal afferent activity increases dynamical dimension of respiration in rats. J Appl Physiol 70:1748-1762 Sano, M., Sawada, Y. (1985) Measurement of the Lyapounov spectrum from chaotic time series. Phys. Rev. Lett. 55:1082-1085 Sansom, M.S.