View Full Version : H reflex in FCR

Hortobagyi, Tibor
01-21-2003, 02:13 AM
Dear List,

this is a summary of responses to my query whether the Biopac system would
have small enough increments in stimulation intensity to evoke an H reflex
in the FCR. Thanks to all who responded.

Tibor Hortobgyi

>From Dr. Hopkins (Ill. State Univ.):
You may use the Iso B or C stimulator unit from Biopac. However, the Iso B
does not produce a full msec pulse - it's more like 0.3 msec even though it
says 1 msec in the stimulator setup. The stimulator setup is very easy to
use in the software.
>From Dr.

>From Dr. Ingersoll (U. Virginia):

Yes, we have used the BIOPAC stimulator rather successfully. We have
not tried the FCR, but have had success with the quads, soleus, TA
and peroneals.

The stimulation intensity can be controlled digitally, which helps
with fine adjustment as well as reproducibility.

>From a BIOPAC rep:

The STM100C module interfaces with the STMISOC, D and E Isolation
Adapters. The isolation adapters will provide you with both Current and
Voltage output options. In the case of the voltage mode the device will
deliver up to 200 volts. The output range is controlled via the level
control dial, which is mounted on the front of the STM100C. The dial
offers fine control from 0 to 100% of the stimulus range.

The stimulus range is set in the AcqKnowledge software Setup Stimulator
dialog box. The dialog box will allow you to select from the following
output options, Square, Sine, Ramp and Arbitrary waveform. Once you have
selected the output option and range, the STM100C level control dial
provides adjustment within that range.

The following links will provide you with some additional information
about the hardware.






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