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. Author manuscript; available in PMC: 2015 Sep 5.
Published in final edited form as: Neuroscience. 2014 Jun 26;275:477–499. doi: 10.1016/j.neuroscience.2014.06.034

Figure 4.

Figure 4

Eye and head movements during locomotion. A, B: Vertical (pitch) and horizontal (yaw) components of eye rotation in the orbit are shown along with the right and left forelimb swing (deflection up, Sw) and stance (deflection down, St) phases of the stride as a cat walks along the flat surface in the light (A) and on the horizontal ladder (B). During flat surface locomotion the cat makes many vertical eye movements while horizontal position of the eye remains rather stable. During ladder locomotion vertical eye movements are even more numerous and less regular, while horizontal movements are still very small. C, D: Vertical and horizontal components of head rotation in the walking chamber-related global coordinate system (X, Y, Z in Fig. 2) are shown as the cat walks along the flat surface in the light (C) and on the horizontal ladder (D). During both flat and ladder locomotion, the rotation of the head in the vertical plane is significantly larger than in the horizontal one.