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. Author manuscript; available in PMC: 2011 Apr 27.
Published in final edited form as: Exp Gerontol. 2008 Oct 10;44(4):261–273. doi: 10.1016/j.exger.2008.09.013

Figure 7. Tetani and twitches recorded in a single intact FDB muscle fiber from an aged (20 mo) FVB mouse.

Figure 7

Baseline represents a tetanic trace elicited with a 300-ms train of pulses at 100 Hz superimposed over a single twitch response in physiological solution. Tetanic #74-Tetanic #77 represent responses to 300-ms trains of pulses at 100 Hz while in Ca2+-free solution. The Recovery trace is a tetanic response to a 300-ms train of pulses at 100 Hz in physiological solution 10 min after the end of the experiment. These traces are representative of 10 fibers from 8 mice.