Rod Cells
Rod Cells - Related Videos
06:04
Performing Subretinal Injections in Rodents to Deliver Retinal Pigment Epithelium Cells in Suspension
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Cited by 32 •
2015
Here we present a community accepted protocol in multimedia format for subretinally injecting a bolus of RPE cells in rats and mice. This approach can be used for determining rescue potentials, safety profiles, and survival capacities of grafted RPE cells upon implantation in animal models of retinal degeneration.
05:40
In Vivo Gene Transfer to Schwann Cells in the Rodent Sciatic Nerve by Electroporation
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Cited by 4 •
2016
Here, we present an in vivo technique for gene transfer to Schwann cells (SCs) in the rodent sciatic nerve. This simple technique is useful for investigating signaling mechanisms involved in the development and maintenance of myelinating SCs.
09:19
Isolating Nasal Olfactory Stem Cells from Rodents or Humans
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Cited by 98 •
2011
We describe here a method for biopsying olfactory mucosa from rat and human nasal cavities. These biopsies can be used for either identifying molecular anomalies in brain diseases or isolating multipotent adult stem cells that can be utilized for cell transplantation in animal models of brain trauma/disease.
14:12
Rodent Identification II
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2015
Source: Kay Stewart, RVT, RLATG, CMAR; Valerie A. Schroeder, RVT, RLATG. University of Notre Dame, IN Animal records must be accurately maintained to ensure that data collection is correct. Records range from maintaining information on cage cards to having a detailed database with all of the relevant information on each animal. The primary component of recordkeeping is the individual identification of research animals. There are a variety of methods suitable for identifying mice and rats. This...
01:34
Environmental Enrichment for Rodents
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2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Environmental enrichment involves objects and practices that encourage natural behaviors, improve psychological well-being, and promote better welfare in laboratory rodents. Environmental enrichment should be tailored to the...
FAQs
Photon absorption activates rhodopsin, which initiates a biochemical cascade rather than producing a direct neural message. The cascade reduces cyclic GMP levels, and this decrease closes sodium channels in the rod cell membrane. The resulting change in membrane potential converts the light event into an electrical signal that can be transmitted through the retinal circuitry.
Because cyclic GMP levels control the state of sodium channels, their reduction links the photochemical event at rhodopsin to a change in membrane potential. This coupling is the central electrical step in phototransduction, allowing rods to encode photon detection before information passes to other retinal neurons. It explains how a molecular reaction becomes a signal available for visual processing.
Rod cells favor sensitivity under dim illumination, but that advantage comes with limited color and spatial resolution. Consequently, they are well suited to detecting visual information when light is scarce, while the resulting image contains less detail and does not support the same color information associated with higher-resolution vision. This tradeoff matters when interpreting night and peripheral vision.
They can examine the sequence from photon-triggered rhodopsin activation through cyclic GMP reduction, sodium-channel closure, and membrane-potential change, then follow how the signal passes through retinal neurons to the brain. Organizing observations in this order helps distinguish molecular phototransduction from later circuit processing and supports experiments focused on where visual information is transformed.
Their signaling pathway connects a defined light-sensitive pigment with measurable biochemical and electrical changes, making rod cells useful for investigating phototransduction. Following the signal beyond the cell also reveals how retinal neurons relay information toward the brain. Together, these features let researchers study both the molecular response to light and the organization of retinal circuitry.
Rod cells provide a biological context for investigating night blindness and retinitis pigmentosa because these conditions can be studied in relation to the rod-cell light-response pathway and retinal connections. Researchers can examine photon-triggered molecular events, membrane responses, and downstream transmission to relate cellular signaling mechanisms to impaired visual function and understand how retinal processing is affected.