Unilateral right parietal damage leads to bilateral deficit for high-level motion

Area of Science:

• Neuroscience
• Cognitive Psychology
• Visual Perception

Background:

• Right parietal damage typically causes attentional deficits in the left visual field.
• Apparent motion perception is generally considered an effortless process.

Observation:

• Patients with right parietal lesions exhibited deficits in apparent motion perception.
• These deficits were observed in both the left (contralesional) and right (ipsilesional) visual fields.

Findings:

• Unlike other attentional tasks, apparent motion deficits were bilateral.
• This suggests a disruption in the temporal resolution of attention affecting transient event processing.

Implications:

• Apparent motion perception relies on attentional mechanisms.
• Parietal damage can lead to widespread, bilateral disruptions in visual attention and perception.