Summary
This thesis provides a detailed anatomical and electrophysiological characterization of the developing retinogeniculate pathway in mice, documenting how retinal inputs segregate into eye-specific domains in the lateral geniculate nucleus during the first two postnatal weeks. While primarily basic neuroscience, these findings offer foundational insight into the visual circuitry that underlies light processing, including pathways relevant to non-image-forming light responses.
Key Findings
- Retinal axon segregation into eye-specific domains is complete by postnatal day 12–14 (time of natural eye opening) in C57/BL6 mice.
- Early postnatal LGN cells receive convergent input from as many as 11 different retinal ganglion cells, with retinal convergence decreasing significantly as eye-specific segregation proceeds.
- Binocular responsiveness in LGN cells is lost as ipsilateral and contralateral retinal projections segregate into non-overlapping territories.
- Plateau-like depolarizations mediated by L-type Ca2+ channels are prominent early in development and decrease in incidence as retinogeniculate refinement proceeds.
Categories
The Science of Light: Characterizes the retinogeniculate pathway — the neural circuit from retina to thalamus — providing foundational knowledge about how visual signals from retinal ganglion cells are transmitted and refined, relevant to understanding ipRGC projections and phototransduction circuitry.
Author(s)
M Román Rosón
Publication Year
2018
Related Publications
The Science of Light
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