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Abstract:
The yaw torque response of tethered flying houseflies Musca, to a moving grating was analyzed quantitatively under conditions comparable to previous and parallel behavioural and physiological investigations (Wehrhahn et al. 1981; Hausen 1982a, b; Hausen and Wehrhahn, in preparation). The stimulus parameters of the experiments are (1) contrast frequency, (2) orientation, (3) position in space, and (4) average luminance of the periodic grating. The similarity of the yaw torque response of houseflies and physiological responses of horizontal cells (Pierantoni 1976) in the third optic ganglion of blowflies provides further evidence that yaw torque generation is controlled to a high degree by these neurones.
