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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: Muscle Nerve. 2009 Nov;40(5):809–814. doi: 10.1002/mus.21399

Figure 2. Distribution of Mean SMUP Amplitudes and MUNE.

Figure 2

A. Distribution of mean SMUP amplitude in SBMA and Age-matched controls. The mean SMUP amplitudes were calculated using a number-weighted equation and excluded the very large SMUPs obtained from analyzing the gaps in the SBMA subjects. The control subjects (○) have a mean SMUP amplitude of 101±28 μV. The SBMA subjects had a mean SMUP amplitude of 78±40μV when all SMUP were included (□) and 130±156 μV when SMUPs ≤ 40 μV were excluded (◇).

B. Distribution of MUNE in SBMA and Age-matched Controls. The control subjects (◦) have a mean MUNE of 98±24 (range 68 – 149), compared to SBMA subjects with a mean MUNE of 60±21 (range 15–111) when all SMUPs were included (□) and 47±23 (range 5–111), when SMUPs ≤ 40 μV were excluded (◇).