1. Changes in macro electromyography over time in patients with a history of polio: a comparison of 2 muscles1 
Arne Sandberg, MD, Erik Stålberg, MD, PhD 
Archives of Physical Medicine and Rehabilitation 
Volume 85, Issue 7, Pages (July 2004)
DOI: /j.apmr

2. Fig 1
Test-retest of macro MUP amplitude in the tibial anterior muscle. Each dot represents the median macro MUP amplitude (μV) from a tibial anterior muscle at the test (x axis) and the retest session (y axis). There is a significant correlation between the test and retest median amplitudes in the control group and the prior polio group.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

3. Fig 2
Macro MUPs from the tibial anterior muscle. (A) Sample from the second investigation. (B) Control reference for comparison.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

4. Fig 3
Age and relative macro MUP amplitude at the first investigation of the (A) tibial anterior and (B) biceps brachii muscles. No correlation was found when performing linear regression (the outlier at age [23] is excluded in the analysis).
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

5. Fig 4
Change in relative macro amplitude for the (A) tibial anterior and (B) biceps brachii muscles versus age. Each line represents 1 muscle. The left-hand border of the line indicates the relative macro MUP amplitude and age at the first investigation; the right-hand border of the line indicates the relative amplitude and age at the second investigation.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

6. Fig 5
Distribution of macro MUP amplitudes at 2 consecutive investigations in the (A, C) tibial anterior and (B, D) biceps brachii muscles. (All MUPs are pooled from individual muscles.)
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )

7. Fig 6
The x axis: relative macro MUP amplitude at first investigation (inv). The y axis: relative change in the macro MUP amplitude between the 2 investigations. The results showed no correlation in linear regression analysis.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /j.apmr )