View Full Version : Safe stimulation frequencies

05-23-2007, 08:37 AM
Dear All,

I have recently been experimenting with a Digitimer D185 cortical
stimulator to provide percutaneous stimulation to the quadriceps using
electrodes placed over the proximal and distal portions of the muscle.
Ideally I would like to apply a stimulus capability of producing a brief
tetanic contraction (...yes this does hurt, I have tried it my self a
number of times whilst I get the stimulus parameters right).

On close inspection of the technical specials on the D185, I notice that
by flipping a switch at the back to the stimulator to a "special"
setting, the stimulator is capability of delivering stimuli at a rate of
up to 1000pps.

Could anyone tell me if this is safe? Could this cause peripheral nerve
damage? What is the highest frequency that would be safe at a stimulus
intensity capable of producing maximal twitch force (following a single

I would greatly appreciate any input anyone may have on this.

Kind regards,


************************************************** *********************
Dr Jack Cannon
BSocSci(Hons), GradDipEd, PhD
Bachelor of Exercise Science Course Coordinator
Lecturer in Motor Control and Learning
School of Human Movement Studies
Faculty of Education
Charles Sturt University
Panorama Avenue
Bathurst 2795
* (02) 6338 4334
* (02) 6338 4065
* jcannon@csu.edu.au
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