PC-
POD-FA-001-v02
PC-POD-FA-001-v02
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Manual Value: Here the normalization value can be entered manually. You can apply
manual values per channel.
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Peak value: This is the main method of finding MVC (Maximum Voluntary
Contraction) values within MVC records. The entry
Window defines a window for
the MVC value calculation. The mean value of this window is taken as the MVC value.
An automatic algorithm calculates each selected channel separately where the highest
mean window is located in the channel and indicates the signal portion with a green
color. When done, a prompt appears that asks you to
Update the MVC stack. The
MVC stack is an internal memory that keeps these MVC values as long as it is filled by
the next Peak value normalization operation. When confirmed by clicking
Yes, these
MVC values are available for the next normalization routine:
MVC Stack. The
functions “Restrict calculation to...” and “Pick” can be used to mouse mark a signal
portion in the record, with the result being that MVC calculations are only performed
in this marked area. This function may be helpful in measurement designs where a
MVC recording period is part of a given record (e.g. at its very beginning).
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To Mean Value: In this normalization method, the amplitude mean value is
calculated for each channel and taken as a reference value for the normalization. This
type of normalization is often used in gait analysis where time normalized EMG
patterns are amplitude normalized again each to its own mean value.
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MVC-Stack: This method loads the current MVC values from the stack. This can be
repeated as many times as needed (e.g. normalized records and trials done after the
MVC record of a subject). The MVC values remain in the stack even if the computer
is shut down. In summary, Normalize to Peak value creates MVC values, Normalize to
MVC Stack loads MVC values for the normalization of other records (of the same
subject).
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Values from other records: This method accesses normalization values found or
applied from this "other" record. Only records of the same subject are listed
(Normalization to another subject's muscle activation would not make sense). Please
verify that the proper normalization routine was performed on this "other" record
(see processing history in the Database Record Info Section). Typically, this is the
MVC trial of one subject, which is used to calculate/find the MVC values within the
