How to view the muscle moment arm length

Main Forum
1

Dear AnyBody support,

I want to check the muscle moment arm length on the MoCapModel.
In addition, I found the report that output the muscle moment arm length:
http://www.anybodytech.com/fileadmin/downloads/Final_Report.pdf

How can we check the muscle moment arm length like “Final Report”?

I would appreciate it if you could give some advice or give us information about it.

Best regards,
Katsunari

2

Hello Katsunari,

unfortunately the calculation of the moment arm is not part of the body model. But you can implement it yourself e.g. if you calculate the angular velocity of a joint and divide the length-change of the muscle (please look at the AnyMuscle class in the reference manual) by this velocity.
The theory behind this can easily derive this by looking at the length change of a line wrapping around a circle (if needed).

I hope this helps.

Best regards
Daniel