Fig. 6From: Intercompartmental communication between the cerebrospinal and adjacent spaces during intrathecal infusions in an acute ovine in-vivo modelRepresentative frequencies of sheep F assessed by fast Fourier transform. The fundamental respiratory frequency at 0.30Â Hz and the cardiac frequency at 1.74Â Hz with their respective harmonics (0.60, 0.90, 1.20, and 1.50Â Hz and 3.50Â Hz, respectively) are depictedBack to article page