Spatial and temporal adaptation of predictive saccades based on motion inference

Area of Science:

• Neuroscience
• Oculomotor control
• Perception

Background:

• Humans and animals can predict the reappearance of occluded moving objects.
• Predictive eye movements (saccades) are crucial for tracking these objects.

Purpose of the Study:

• To investigate adaptive learning in the prediction of object reappearance.
• To differentiate the neural mechanisms underlying predictive and reactive saccades.

Main Methods:

• Monkeys performed predictive saccades to anticipated object reappearance locations.
• Systematic changes in target location and timing were introduced.
• The effects of adaptation on both predictive and reactive saccades were analyzed.

Main Results:

• Predictive saccade endpoints and latencies adapted to changes in target reappearance.
• Spatial adaptation of predictive saccades did not affect reactive saccades.
• Adaptation of reactive saccades altered predictive saccade metrics.

Conclusions:

• Motion trajectory extrapolation is subject to adaptive recalibration.
• Distinct neural pathways likely mediate predictive and reactive saccade adaptation.
• Cerebellar regions may differentially regulate trajectory prediction and saccade learning.