Scheduled System Maintenance:
Some services will be unavailable Sunday, March 29th through Monday, March 30th. We apologize for the inconvenience.
By Topic

Motor unit control strategies of knee antagonist muscles during constant force and linearly increasing isometric contractions

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

The purchase and pricing options are temporarily unavailable. Please try again later.
3 Author(s)
Bernardi, M. ; Bioeng. Lab., Louisiana State Univ. Med. Center, New Orleans, LA, USA ; Solomonow, M. ; Baratta, R.V.

The motor unit control strategies of the quadriceps and hamstrings muscles were studied during two different types of isometric contraction (step-wise and ramp increasing) by means of the EMG power density spectrum median frequency. It was found that each muscle has different motor unit control strategies when acting as agonist and antagonist. In the agonist muscle, ramp type contractions resulted in recruitment up to 60% of the maximal voluntary force, whereas step type contractions showed evidence of median frequency increase up to 50% of maximum. Antagonist recruitment was found up to a higher force level in extension tasks. It was concluded that the role of each muscle and the particular type of task have an influence on the control strategy employed

Published in:

Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE

Date of Conference:

3-6 Nov 1994