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Jose Haroldo Cavalcante
07-18-1995, 12:05 AM
Dear BIOMCHers,


I am posting the summary of responses to my query about ACL evaluation during
gait. Thank you very much to that who have contacted me!


My original message:


Dear all,

I am looking for information regarding methods for evaluating the action of
the Anterior Cruciate Ligament (ACL) during the gait.
As it is usual, I will post a summary of responses.

Thank you in advance,


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Jose Haroldo de Assis Cavalcante SMHS 501 "A"
Engineer 70.330-150

Motion Laboratory Brasilia-DF
SARAH Hospital BRAZIL

(55) (61) 319-1440 (voice)
(55) (61) 319-1447 (fax)
E-mail: haroldo@lab01.sarah.br
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From: MX%"mike.poling@oln.com" 3-JUL-1995 15:10


I'm doing my Masters thesis on ACL temporal data during normal gait, incline
and decline at varying speeds. I'm attempting to discern whether or not there
is a significant difference between ACL deficient knees and uninjured knees in
regards to the hamstring co-contraction reflex. I have read some studies on
ACL loading during gait and they all seem to suggest in vivo studies with bio
strain gauges within the ligament to sense loading and unloading during gait.
Unfortunately, the only other methods discussed were radiological examinations
throughout the movement with extremely expensive equipment. And apparently the
accuracy left something to be desired.
Hope this helps.
Mike Poling, H.B.P.E., M.Sc.(Kin.), C.F.A.
Lakehead University/Canadian Back Institute
Thunder Bay, Ontario, Canada


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From: MX%"vilensk@CVAX.IPFW.INDIANA.EDU" 3-JUL-1995 15:31


Jose:

The ACL has been evaluated both in dogs and people using kinematics,
EMG, and force plates. I have used kinematics to study study
with cuts ACLs. What more do you wish to know.

Joel A. Vilensky
Indiana University
VILENSK@CVAX.IPFW.INDIANA.EDU


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From: LAB01::LABMOV 4-JUL-1995 15:14
To: MX%"vilensk@CVAX.IPFW.INDIANA.EDU"

Dear Joel,

Thank you for your answer! Our main concern is whether a thin-wire electrode
inserted in the ACL could detect any efferent signal and thus inform the
moment the ligament is being requested.

Best regards,

Jose' Haroldo

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From: MX%"vilensk@CVAX.IPFW.INDIANA.EDU" 6-JUL-1995 09:53


Jose'

I don't think such an experiment would result in significnat findings.

The latest thinking is that some part of the ACL is always tense during
movement. Thus, you would need to be sure what part of the ACL your
electrode was in, and be able to replicate it.

Joel

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