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Dear Listmembers,
Recently I asked for solutions of problems in measuring intramuscular
EMG using fine-wire electrodes.
There were a few replies which I want to post on Biomch-L. Thank you
very much for your answers:
To avoid or solve problems during measuring intramuscular EMG using fine
wire electrodes you can / should ...
-take a impedance meter and check each electrode within the needle
before insertion
-secure if the leads are not to short (which would produce a flat line)
-secure if the ends of the wires are staggered enough, so that the
stripped ends do not make any contact
-stripping the insulation off the ends of the wires for 1 mm
-interface the proximal ends of the wire into coils of springs directly
taped to the skin near insertion side
-be very carefully not to pull the wires after successful application
(because of the possible lost of staggering into the muscle)
-try to pull one wire carefully if you do not measure any signal
-twist the two wires after it has been threaded into the needle
(twisting reduces noise)
-add a extra coat of teflon insulation to ensure adequate insulation
(especially at the sharp end of the needle insulation can be faulty and
make contact)
-use ultrasound to confirm correct placement of the wires
-find helpful information in:
Burgar C.G., Valero-Cuevas F.J. and Hentz V.R. (1997). Fine-wire
electromyographic recording during force generation. Application to the
index finger kinesiologic studies. Am J Phys Rehabil 76(6):494-501
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Recently I asked for solutions of problems in measuring intramuscular
EMG using fine-wire electrodes.
There were a few replies which I want to post on Biomch-L. Thank you
very much for your answers:
To avoid or solve problems during measuring intramuscular EMG using fine
wire electrodes you can / should ...
-take a impedance meter and check each electrode within the needle
before insertion
-secure if the leads are not to short (which would produce a flat line)
-secure if the ends of the wires are staggered enough, so that the
stripped ends do not make any contact
-stripping the insulation off the ends of the wires for 1 mm
-interface the proximal ends of the wire into coils of springs directly
taped to the skin near insertion side
-be very carefully not to pull the wires after successful application
(because of the possible lost of staggering into the muscle)
-try to pull one wire carefully if you do not measure any signal
-twist the two wires after it has been threaded into the needle
(twisting reduces noise)
-add a extra coat of teflon insulation to ensure adequate insulation
(especially at the sharp end of the needle insulation can be faulty and
make contact)
-use ultrasound to confirm correct placement of the wires
-find helpful information in:
Burgar C.G., Valero-Cuevas F.J. and Hentz V.R. (1997). Fine-wire
electromyographic recording during force generation. Application to the
index finger kinesiologic studies. Am J Phys Rehabil 76(6):494-501
---------------------------------------------------------------
To unsubscribe send SIGNOFF BIOMCH-L to LISTSERV@nic.surfnet.nl
For information and archives: http://isb.ri.ccf.org/biomch-l
---------------------------------------------------------------