FIGURE 2.

Rostral ventrolateral medullary (RVLM) neuronal firing spectra. Rostral ventrolateral medullary extracellular single neuronal recordings were conducted in unanesthetized midcollicularly decerebrate cats contemporaneously with systolic arterial pressure (SAP). Rostral ventrolateral medullary neuronal spectra reveal a spectral peak correlating with Mayer waves at slightly less than 0.1 Hz and a spectral peak at approximately 0.36 Hz, likely corresponding with Traube–Hering waves. Systolic arterial pressure spectra reveal a correlated Mayer spectral peak approximating 0.08 Hz and respirophasic oscillations exhibiting a lower amplitude and higher frequency corresponding with Traube–Hering waves a central tendency of 0.28 Hz. RVLM-SAP power spectral cross correlogram reveals prominent oscillatory correspondence at several spectral bands. Modified with permission from Montano et al. (1996).