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Measuring Attentional Biases for Threat in Children and Adults

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Neglect and Motion Stimuli--Insights from a Touchscreen-Based Cancellation Task.

Simone Hopfner¹, Sonja Kesselring¹, Dario Cazzoli²

¹Perception and Eye Movement Laboratory, Departments of Neurology and Clinical Research, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland.

|July 10, 2015

Summary

Motion impacts spatial neglect in stroke patients. The optic radiation

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Area of Science:

Neuroscience
Neurology
Rehabilitation Medicine

Background:

Spatial neglect is commonly assessed using static cancellation tasks.
Current methods do not evaluate neglect symptom changes with dynamic stimuli.
Visual field deficits are frequent in neglect patients.

Purpose of the Study:

To compare neglect patient cancellation behavior under static versus dynamic conditions.
To investigate the influence of optic radiation integrity on dynamic cancellation performance.

Main Methods:

Twenty-five right-hemispheric stroke patients with left spatial neglect participated.
A touchscreen cancellation task was used with stationary and moving targets.
Right optic radiation integrity was assessed using a hodologic probabilistic approach.

Main Results:

Target motion affected cancellation behavior in neglect patients.
Intact optic radiation correlated with decreased neglect severity in dynamic conditions.
Optic radiation damage correlated with increased neglect severity in dynamic conditions.

Conclusions:

Dynamic visual stimuli can modulate spatial neglect severity in stroke survivors.
Optic radiation integrity may predict the effect of motion on neglect symptoms.