Fig. 4.
A representative summary of the index of total swallows (hr−1) for each sleep phase (W, N1, N2, N3, and R) in the subjects with SCI (n = 16) vs. able-bodied (AB; n = 13) subjects. *Number of swallows in the W phase is significantly higher in the subjects with SCI compared with the AB subjects (P < 0.05). ╪Wake phase is significantly higher (P < 0.001) than other event phases. The statistical test used is two-way repeated measures ANOVA (F = 76.1, P = 0.001 for sleep phase factor). All representative data are mean ± SE. N1, non-REM stage1; N2, non-REM stage2; N3, non-REM stage3; R, REM; REM, rapid eye movement; SCI, spinal cord injury; W, Wake.