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Related Experiment Video

Updated: Jul 3, 2026

Behavioral Assessment of Manual Dexterity in Non-Human Primates

Behavioral Assessment of Manual Dexterity in Non-Human Primates

Published on: November 11, 2011

Functional MT + lesion impairs contralateral motion processing.

Lauren R Moo¹, Britt C Emerton, Scott D Slotnick

¹Neuropsychology Laboratory, Department of Neurology, Massachusetts General Hospital, Boston, MA02114, USA. lmoo@partners.org

Cognitive Neuropsychology

|July 25, 2008

Summary

Human motion processing relies on the MT+ region. A patient with a left MT+ lesion showed deficits in right visual field motion perception, suggesting MT+ is crucial for normal motion processing.

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Area of Science:

Neuroscience
Cognitive Neuroscience
Visual Neuroscience

Background:

The human motion processing region MT+ is retinotopically organized.
Perception and attention to motion in one visual field are preferentially associated with activity in the contralateral MT+.

Observation:

A patient with epilepsy and a left temporal-occipital seizure onset exhibited visual symptoms.
This patient showed impaired motion attention and picture identification in the right visual field.
Functional MRI revealed a lack of left MT+ activation during motion tasks in the patient, unlike controls.

Findings:

The patient demonstrated deficits in motion processing specifically linked to the left MT+ region.
Functional MRI confirmed absent left MT+ activation during motion detection and attention tasks.
These results indicate a critical role for MT+ in human motion processing.

Implications:

MT+ is essential for typical human motion processing.
This case study provides strong evidence for the necessity of MT+ in visual motion perception and attention.
Understanding MT+ function is vital for diagnosing and treating visual processing disorders.