Abstract
A patient with slow muscle relaxation but without accompanying motor unit or myotonic electrical activity had a unique staircase twitch response to repeated nerve stimulation. During 1‐Hz stimulation, twitches recorded by measurement of the ankle dorsiflexor group displayed progressively increasing relaxation times with successive stimuli (37% increase) unlike the progressively decreasing relaxation time of the normal response (12–37% decrease). The response may be diagnostic of this unusual myopathy; the test methods are noninvasive and easily tolerated.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 326-329 |
| Number of pages | 4 |
| Journal | Muscle & Nerve |
| Volume | 13 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 1990 |
Keywords
- calcium uptke
- calcium‐magnesium‐ATPase
- muscle relaxation
- muscle twitch
- sarcoplasmic reticulum
- staircase