Your institution is subscribed to Read Institutional Edition. Log in or Sign Up to read full text articles.

JOURNAL ARTICLE

Scanning EMG in normal muscle and in neuromuscular disorders

E Stålberg, P Dioszeghy
Electroencephalography and Clinical Neurophysiology 1991, 81 (6): 403-16
1721580
The spatial distribution of motor units in normal subjects and in patients with neurogenic and myogenic conditions was studied. The possibilities and the difficulties in quantifying the records are discussed. Normal values are presented for the brachial biceps and anterior tibial muscles. The results are compared to the previous multielectrode studies. The findings in pathological conditions compared to normals are evaluated. The scanning EMG verified the rearrangement of muscle fibres in abnormal muscles. The most striking finding was the presence of long polyphasic sections in abnormal muscles. However, this parameter did not differentiate neurogenic from myogenic cases. The length of the motor unit cross-section did not differ significantly in the abnormal muscles compared to normal. Thus, the size of motor unit territory does not seem to be a useful parameter to detect pathology. Scanning EMG gives a new dimension to exploring the motor unit characteristics not attainable by conventional methods and provides important information towards a better understanding of concentric needle EMG. Examples are shown from healthy subjects and from patients with neuromuscular diseases, both for the different parameters and special phenomena.

Full Text Links

Find Full Text Links for this Article

Discussion

You are not logged in. Sign Up or Log In to join the discussion.

Trending Papers

Remove bar
Read by QxMD icon Read
1721580
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"

We want to hear from doctors like you!

Take a second to answer a survey question.