Gaze coordination with strides during walking in the cat.

Area of Science:

• Neuroscience
• Biomechanics
• Animal Behavior

Background:

• Vision is critical for navigating complex environments.
• The precise coordination between gaze control and stride patterns during locomotion remains incompletely understood.
• Understanding this relationship is key to deciphering motor control and sensory integration.

Purpose of the Study:

• To investigate the coordination between gaze behaviors (shifts, fixations, constant gaze) and stride cycles in cats.
• To determine if this coordination is vision-driven or an intrinsic component of locomotion.
• To explore how environmental complexity and speed influence gaze-stride coupling.

Main Methods:

• Cats walked on various surfaces (flat, ladder, stones) in light and darkness.
• Gaze direction, eye movements (vertical/horizontal), and 3D head motion were recorded.
• Gaze intersection with the walkway was calculated to analyze coordination with stride phases.

Main Results:

• Gaze behaviors were coordinated with strides even in darkness, occurring sequentially within stride phases.
• Complex surfaces and faster speeds generally increased the tightness of gaze-stride coordination.
• Modulations in coordination phase occurred, with some behaviors shifting earlier or later depending on conditions.

Conclusions:

• Gaze-stride coordination is an integral part of whole-body locomotion synergy, not solely reliant on visual input.
• The visual environment and specific locomotor tasks dynamically modulate this coordination.
• Findings offer insights for understanding motor deficits and developing rehabilitation strategies.