Distributed and retinotopically asymmetric processing of coherent motion in mouse visual cortex

Area of Science:

• Neuroscience
• Visual Processing
• Mammalian Brain Function

Background:

• Visual motion perception is crucial for mammalian behaviors.
• Primate visual cortex has specialized motion-processing regions.
• Mouse visual cortex organization for motion remains poorly understood.

Purpose of the Study:

• To investigate the organization of visual motion processing in the mouse cortex.
• To determine if mouse visual cortex exhibits specialized regions for coherent motion detection.
• To map neural responses to visual motion across different visual areas in mice.

Main Methods:

• Utilized widefield and 2-photon calcium imaging in transgenic mice.
• Presented natural movies and random dot kinematograms (RDKs) to elicit responses.
• Recorded neural activity in primary visual cortex (V1) and higher visual areas (HVAs).

Main Results:

• Found varied responsiveness to coherent motion across mouse visual areas.
• Observed stronger motion responses in dorsal stream areas compared to ventral stream areas.
• Identified anisotropy within visual areas, with enhanced sensitivity in the lower visual field representation.

Conclusions:

• Mouse visual cortex exhibits a heterogeneous distribution of visual motion processing.
• Processing of coherent visual motion is not uniformly organized across mouse visual areas.
• Neural responses to visual motion vary both between and within cortical visual areas in mice.