Table 1.

Raw force values and potentiation during 8 s of 8-Hz stimulation

Condition Force Potentiation 
 mN   % 
Twitch number 90 s Pre 64 64 
30°C 22.7 ± 1.8 22.5 ± 1.7 21.0 ± 1.6a −6.8 ± 1.9 
37°C 17.4 ± 1.7b 17.3 ± 1.7b 21.7 ± 1.8a 26.8 ± 3.2b 
Condition Force Potentiation 
 mN   % 
Twitch number 90 s Pre 64 64 
30°C 22.7 ± 1.8 22.5 ± 1.7 21.0 ± 1.6a −6.8 ± 1.9 
37°C 17.4 ± 1.7b 17.3 ± 1.7b 21.7 ± 1.8a 26.8 ± 3.2b 

Mouse lumbrical muscles were stimulated at 8 Hz for 8 s at either 30 or 37°C. Peak twitch force is reported for the first (Twitch 1) and last twitches (Twitch 64) of this protocol, along with an unpotentiated twitch occurring 90 s before the initiation of the stimulation protocol (90 s Pre). Percent potentiation refers to the relative change in peak force seen between the first and last twitches within each condition. See Figs. 2 and 3 for more detailed results. All values are presented as mean ± SEM.

a

Different from twitch 1 and 90 s Pre (P < 0.05).

b

Different than 30°C (P < 0.05).

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