Abstract
External manifestations of postural control in the dog have been measured under static and dynamic conditions. During quiet standing, trained dogs were found to exhibit laterally symmetric weight distribution and to carry approximately 60% of their weight on their front legs. Lateral symmetry of weight distribution was also the rule during the postural reaction to momentary (ramp) or continuous (sinusoidal) displacement of the support platform on which the dogs stood. A Fourier analysis of data obtained during sinusoidal oscillation of the table provided an indication of the amount of harmonic distortion generated by the dog. It was found that records of body position were relatively free from distortion, thus implying a relatively linear transformation of the input signal. However, the motions of the various hindlimb joints and the changes in vertical forces which were engendered by the table oscillation all showed considerable distortion. Hence, the components of the postural control system might be seen to behave in essentially non-linear fashion (or to be governed by time varying parameters) while the basic system output- body position in space — apparently exhibits low pass filter characteristics and hence resembles certain characteristics usually associated with linear systems.
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Talbott, R.E. (1973). Postural Control: A Quantitative Study of Nervous System Functions in the Dog. In: Stein, R.B., Pearson, K.G., Smith, R.S., Redford, J.B. (eds) Control of Posture and Locomotion. Advances in Behavioral Biology, vol 7. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-4547-3_23
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DOI: https://doi.org/10.1007/978-1-4613-4547-3_23
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