- Rare disorder characterized by loss of motion vision
- Patients see a series of “freeze-frames” instead of smooth motion
- Can be caused by stroke or a medication side effect
- Can be present without any other visual deficits
- Usually is a temporary condition

Akinetopsia

- Some retinal ganglion cells are most responsive to movement in a specific direction.
- Neurons in V5 receive these signals that are crucial for movement perception.
- These neurons are near the regions that control eye movements.

University of Michigan - Ann Arbor

- The visual cortex has many regions that process visual information
- Most visual information passes through the primary visual cortex, or area V1 or Brodmann area 17
- There are many other areas of the visual cortex that have important roles in vision

Brain regions involved in sight

- Some information from the primary visual cortex stretches' dorsally toward the parietal lobe
- This stream is speculated to assist in the analysis of visual motion and the visual control of action

Dorsal Stream

Breedlove, S. & Watson, N. (2017). Behavioral neuroscience, eighth edition. Oxford University Press.

Behavioral Neuroscience 8th Edition

Four main dimensions that V1 represents
- Location in the visual field
- Occular dominance
- Orientation
- Color

Organization of primary visual cortex

Area V5: perception of visual motion

Beyond the Primary Visual Cortex

- Medial superior temporal area
- Contains neurons selective for linear motion, radial motion, and circular motion

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