Table 3.

Transfer function metrics of mean arterial pressure and cerebral blood flow velocity in the supine and upright positions

	SCI		SCImido		AB
	Supine	Max Tilt	Supine	Max Tilt	Supine	Max Tilt
MAP power spectrum, mmHg2/Hz−1	0.88 ± 0.61	0.89 ± 0.57*	0.64 ± 0.62	0.79 ± 0.98	2.34 ± 1.77	10.65 ± 10.94‡
MCA power spectrum, cm2·s−2·Hz−1	2.51 ± 1.60	0.98 ± 0.83*	1.66 ± 1.13	1.28 ± 0.97	3.45 ± 3.28	9.26 ± 9.51
MCA coherence, au	0.64 ± 0.17	0.55 ± 0.19*	0.54 ± 0.21	0.58 ± 0.21	0.65 ± 0.17	0.84 ± 0.09‡
MCA gain, cm·s−1·mmHg−1	1.76 ± 0.96	1.16 ± 0.82	1.87 ± 0.68	1.40 ± 0.68‡	1.34 ± 0.63	1.16 ± 0.60
MCA n-gain, %·mmHg−1	2.23 ± 0.91	3.93 ± 4.36	2.43 ± 0.88	2.22 ± 1.28	1.66 ± 0.53	1.71 ± 0.59
MCA phase, rad	0.46 ± 0.30†	0.47 ± 0.39	0.74 ± 0.46	0.36 ± 0.28‡	0.67 ± 0.24	0.50 ± 0.13‡
PCA power spectrum, cm2·s−2·Hz−1	1.01 ± 0.42	0.87 ± 0.46	1.20 ± 0.76	0.68 ± 0.66	1.27 ± 0.97	3.87 ± 5.36
PCA coherence, au	0.64 ± 0.15	0.59 ± 0.17*	0.51 ± 0.21	0.52 ± 0.20	0.55 ± 0.14	0.76 ± 0.17‡
PCA gain, cm·s−1·mmHg−1	1.01 ± 0.51	1.00 ± 0.51*	1.32 ± 0.75	0.84 ± 0.49‡	0.87 ± 0.43	0.68 ± 0.37‡
PCA n-gain, %·mmHg−11	2.17 ± 1.19	2.57 ± 1.56	2.94 ± 1.27	1.94 ± 1.02‡	1.98 ± 0.80	1.73 ± 0.66‡
PCA phase, rad	0.40 ± 0.27	0.55 ± 0.50	0.48 ± 0.19	0.26 ± 0.38	0.78 ± 0.34	0.50 ± 0.19‡

^*Significantly different from AB (P < 0 0.05); †significant different from SCImido (P < 0.05);

^‡significantly different from supine (P < 0.05). Significant relationships are highlighted with bold text. Values are means ± SD.