Table 1.

Amplitude and duration of localized and global Ca²⁺ transients recorded from normal and mdx muscle fibers

	(ΔF/F)peak				FDHM, ms
	T	Z	M	Global	T	Z	M	Global
Control	2.01 ± 0.03 (200/10)	1.29 ± 0.04 (98/10)	1.33 ± 0.03 (98/10)	1.82 ± 0.10 (11/7)	2.13 ± 0.02 (200/10)	2.62 ± 0.06 (98/10)	2.57 ± 0.06 (98/10)	2.24 ± 0.07 (9/7)
mdx	1.50 ± 0.02 (140/11)	0.92 ± 0.03 (70/11)	1.05 ± 0.02 (73/11)	1.37 ± 0.07 (11/9)	2.33 ± 0.03 (140/11)	3.18 ± 0.13 (70/11)	2.93 ± 0.08 (73/11)	2.35 ± 0.13 (9/9)
Percentage change	−25*	−29*	−21*	−25*	+9.6*	+22*	+14*	+4.9

Values are expressed as mean ± SEM. (ΔF/F)_peak and FDHM are the amplitude and the FDHM of ΔF/F transients, respectively. T, Z, and M denote confocal transients recorded at specific locations, and ″global″ denotes transients recorded with global illumination (see text). Percentage change is the decrease (−) or increase (+) of parameter values measured in mdx with respect to those measured in control fibers. The asterisk indicates statistically significant changes (P < 0.05). Numbers in parenthesis (n/f) are the number of records, n, and fibers, f. Data were obtained from seven mdx and nine control animals.