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Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing
Published on: February 23, 2024
Akinetopsia: a systematic review on visual motion blindness.
Johanna L Browne1, Lydia Krabbendam1, Jan Dirk Blom2,3,4
1Faculty of Behavioural and Movement Sciences, Free University, Amsterdam, Netherlands.
Akinetopsia (visual motion blindness) is more complex than previously understood, with varied causes and symptoms affecting the V5/MT area. Research highlights the right hemisphere
Area of Science:
- Neuroscience
- Perception
- Ophthalmology
Background:
- Akinetopsia, or visual motion blindness, causes perception of motion as disjointed 'jumps' or 'freeze frames.'
- The condition's pathophysiology is not fully understood, despite the known role of cortical area V5/MT in visual motion processing.
Purpose of the Study:
- To systematically review case descriptions of motion blindness, including those with additional symptoms.
- To elucidate the phenomenological, pathophysiological, and etiological heterogeneity of akinetopsia.
Main Methods:
- Conducted a systematic review of 25 clinical and 27 experimental case descriptions of akinetopsia.
- Analyzed data on symptom presentation, course, laterality, and underlying causes.
Main Results:
- Clinical cases showed varied presentations: 12% hemiakinetopsia, 50% continuous symptoms, 52% chronic course.
- Left V5/MT susceptibility noted in right-handed individuals (experimental); right V5/MT dominance suggested in clinical cases.
- Severity correlates with visual motion network integrity and object speed; organic lesions often resist treatment.
Conclusions:
- Akinetopsia is more heterogeneous than previously recognized across phenomenological, pathophysiological, and etiological aspects.
- Recommendations are provided for clinical practice and future research directions.
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