Using a variety of preparations, (intact birds during treadmill and overground
walking/running and free-flight; decerebrate birds during electrically induced
walking/running, passive wing flapping, and electrically induced wing flapping and
"Active" flight), this thesis examines some of the mechanisms involved in the
production and control of locomotor-respiratory coordination (entrainment) during
alternating hindlimb locomotion (walking/running) and synchronous forelimb
locomotion ("flight") in the Canada goose.
Significant coordination of locomotor and respiratory rhythms was observed
during both modes of locomotion in intact as well as decerebrate birds. While
coordination of forelimb motion and respiration was virtually complete, coordination
of hindlimb motion and respiration was sporadic. The level of entrainment during
hindlimb locomotion, however, increased with increased stride frequency, rather than
increased work rate, suggesting that proprioceptive feedback from the limbs is
involved in the production of locomotor-respiratory entrainment. Further evidence for
a role of proprioceptive feedback in the production of entrainment was provided by
the entrainment of respiration by passive wing motion in decerebrate geese.
Although feedback from the periphery was sufficient for the entrainment of wing
motion and respiration, motor nerve outputs to the wing and respiratory musculature
were also synchronized in paralyzed, decerebrate birds during electrically induced
activity, in the complete absence of phasic afferent feedback. Thus, both feedback
and feedforward mechanisms appear sufficient for the coordination of wing beat and
respiration. / Science, Faculty of / Zoology, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/41446 |
| Date | January 1990 |
| Creators | Funk, Gregory Douglas |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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