Physiology and pathology of eye-head coordination

Area of Science:

• Neuroscience
• Oculomotor Control
• Human Motor Behavior

Background:

• Eye and head movements are coordinated within the oculomotor system for gaze control.
• Individuals exhibit flexible yet stereotypical eye-head coordination patterns for specific visual tasks.

Purpose of the Study:

• To review eye-head coordination in laboratory and daily life tasks.
• To examine the impact of aging and pathology on eye-head coordination.
• To explore the role of frontal cortical regions in eye-head movement control.

Main Methods:

• Review of laboratory-based visual tasks (saccadic gaze shifts, pursuit).
• Analysis of common daily tasks (e.g., reading).
• Examination of age-related changes from infancy to senescence.
• Consideration of pathological effects on oculomotor control.

Main Results:

• Eye-head coordination demonstrates flexibility but also task-specific stereotypical patterns.
• Aging significantly affects eye-head coordination across the lifespan.
• Pathologies, from simple restrictions to complex conditions like schizophrenia, impact eye-head control.
• Evidence suggests frontal cortical regions are crucial for planning and executing eye-head behaviors.

Conclusions:

• The adaptable nature of eye-head coordination suggests significant control by frontal cortical regions.
• Contextual and expectation-based changes in eye-head coordination support the role of frontal lobes.
• Frontal lobe dysfunction demonstrably alters eye-head coordination patterns.