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Updated: May 25, 2026
08:44
Patch Clamp Recording of Starburst Amacrine Cells in a Flat-mount Preparation of Deafferentated Mouse Retina
Published on: October 13, 2016
Cellular mechanisms underlying spatiotemporal features of cholinergic retinal waves
Kevin J Ford1, Aude L Félix, Marla B Feller
1Department of Molecular and Cell Biology and Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, California 94720, USA.
Summary
Starburst amacrine cells (SACs) generate rare, spontaneous retinal waves before vision. Their recurrent connections and variable activity explain the slow, finite propagation of these crucial developmental signals.
Area of Science:
- Neuroscience
- Developmental Biology
- Retinal Circuitry
Background:
- Developing retinas exhibit spontaneous activity called retinal waves before vision onset.
- Starburst amacrine cells (SACs), a type of cholinergic interneuron, form a recurrent network crucial for these early waves.
Purpose of the Study:
- To elucidate the mechanisms governing the spatial and temporal properties of spontaneous cholinergic retinal waves.
- To understand how SACs initiate and propagate activity in the developing retina.
Main Methods:
- Electrophysiology (perforated-patch recordings)
- Calcium imaging (two-photon)
- ACh optical sensing
- Computational modeling
Main Results:
- Retinal waves initiate from rare spontaneous depolarizations of SACs.
- Wave propagation relies on recurrent cholinergic connections and acetylcholine (ACh) volume transmission.
- SACs exhibit slow afterhyperpolarizations, leading to variable depolarizations and influencing wave dynamics.
- A computational model based on physiological SAC properties successfully reproduced observed wave frequency, speed, and size.
Conclusions:
- The study details the circuit mediating cholinergic retinal waves.
- Interneuron variability within the SAC network is critical for robust wave generation across development and species.
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