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Extracellular recording in neuronal networks with substrate integrated microelectrode arrays
1Naturwissenschaftliches und Medizinisches Institut, Universität Tübingen in Reutlingen, Germany.
Biosensors & Bioelectronics
|January 1, 1994
Summary
Chicken retinal ganglion cells show light-responsive electrical activity only after embryonic day 18. This finding correlates with the developmental timeline of photoreceptor differentiation in the developing chicken retina.
Area of Science:
- Neuroscience
- Developmental Biology
- Bioengineering
Background:
- The development of light sensitivity in the retina is crucial for visual function.
- Understanding the precise timing of neuronal responses to light is key to studying visual system development.
Purpose of the Study:
- To investigate the developmental emergence of light-evoked neuronal electrical activity in chicken retinal ganglion cells.
- To correlate the onset of light responsiveness with photoreceptor differentiation stages.
Main Methods:
- Extracellular recordings were performed using a 60-channel substrate-integrated microelectrode array.
- Neuronal activity of chicken retinal ganglion cells was recorded from embryos at embryonic days 14-18.
- Light stimulation was applied to assess light-evoked responses.
Main Results:
- Retinal ganglion cells from embryonic day 18 chickens exhibited light-responsive electrical activity.
- Cells from earlier embryonic days (14-18) did not respond to photostimulation.
- Increased neuronal activity upon light stimulation in day 18 embryos aligned with photoreceptor differentiation timelines.
Conclusions:
- Photoreceptor-driven light responses in retinal ganglion cells mature by embryonic day 18 in chickens.
- This study provides a temporal marker for functional visual system development in avian embryos.