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Table 1 Stages of nerve stretch experiment and comparison with the nerve compression experiment

From: Acute nerve stretch and the compound motor action potential

Stretch

Compression

Stage

Description

Maximum Force (gm)

Duration

Stage

Description

Maximum Force (gm)

Duration

1

Baseline

0

 

1

Baseline

0

 

2

First Stretch

10

3 min*

Mean 3.01

    

3

First Recovery

0

3 min

    

4

Second

Stretch

20

3 min*

Mean 2.87

2

First

Compression

20

3 min*

Mean 3.5

5

Second

Recovery

0

3 min

3

First

Recovery

0

3 min

6

Third

Stretch

40

3 min*

Mean 1.78

4

Second Compression

80

3 min*

Mean 1.78

7

Third Recovery

0

3 min

5

Second

Recovery

0

3 min

8

Fourth

Compression

Until 0 Amplitude

3 min*

Mean 4.41

6

Third

Compression

Until 0 Amplitude

3 min*

Mean 1.91

9

Fourth

Recovery

0

3 min

7

Third

Recovery

0

3 min

  1. This table also shows sequence of force application during an experiment. It should be noted that in stretch stages 2 4 and 6 if the CMAP amplitude fell to half of its baseline, then the stretch was immediately released. In stage 8, when the CMAP amplitude reached zero, the stretch was immediately released. Note that leg 8 is longer than the other legs because of the extended time it took to gently create the higher stretch forces.
  2. *Planned duration. The number below this is the actual mean duration of the given stage.