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Anatol Feldman wrote:
I also disagree with Yildirim Hurmuzlu^s suggestion that locomotion
is a limit cycle. A specific case of locomotion - a single step - is not
a periodic process, which conflicts with the notion of limit cycle.
During continuous walking or running, a state variable - the position of
the body in space - changes monotoniously, which also conflicts with the
notion of limit cycle. If you consider only relative motion of the body
segments you may reduce the phenomenon of locomotion to a limit cycle
but in this case you ignore the explanation of the most important aspect
of locomotion - the displacement of the body in the environment.
Mariano Garcia responds:
If this were true, then one would expect people to walk much differently
on treadmills than they do on a hard surface, which is probably not true.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Mariano Garcia, Ph.D.
2250 North Triphammer Rd. Apt H-2B
Ithaca NY 14850
ph: 607-257-3509, email: garcia@tam.cornell.edu
still associated with the
Polypedal Lab, Dept. Of Integrative Biology
University of California Berkeley
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I also disagree with Yildirim Hurmuzlu^s suggestion that locomotion
is a limit cycle. A specific case of locomotion - a single step - is not
a periodic process, which conflicts with the notion of limit cycle.
During continuous walking or running, a state variable - the position of
the body in space - changes monotoniously, which also conflicts with the
notion of limit cycle. If you consider only relative motion of the body
segments you may reduce the phenomenon of locomotion to a limit cycle
but in this case you ignore the explanation of the most important aspect
of locomotion - the displacement of the body in the environment.
Mariano Garcia responds:
If this were true, then one would expect people to walk much differently
on treadmills than they do on a hard surface, which is probably not true.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Mariano Garcia, Ph.D.
2250 North Triphammer Rd. Apt H-2B
Ithaca NY 14850
ph: 607-257-3509, email: garcia@tam.cornell.edu
still associated with the
Polypedal Lab, Dept. Of Integrative Biology
University of California Berkeley
---------------------------------------------------------------
To unsubscribe send SIGNOFF BIOMCH-L to LISTSERV@nic.surfnet.nl
For information and archives: http://isb.ri.ccf.org/biomch-l
---------------------------------------------------------------