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. Author manuscript; available in PMC: 2014 Dec 9.
Published in final edited form as: Neuroscience. 2013 Jan 29;236:210–219. doi: 10.1016/j.neuroscience.2012.12.032

Figure 2.

Figure 2

Examples of non-human primate gaze shifts “triggered” by the appearance of a visual target (from Bizzi, 1971). A. For triggered gaze shifts, a saccadic eye movement (upper trace) precedes the head movement (lower trace). The arrow points to a compensatory eye movement that follows the saccade. B. A brake (application indicated by lowermost solid line) unexpectedly interrupts the head movement component of a triggered gaze shift so there is no compensatory eye movement. In both panels the trace labeled e is eye position and the trace labeled h is head position. The dot beneath the head position trace indicates the appearance of the visible target. Calibration is 500 msec and 15 deg.