Radial Spokes
Radial Spokes - Related Videos
01:23
Radial System Protection
0 Views •
2024
Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system. In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
02:39
Evaluating Motor Impairment in C. elegans Models Using the Radial Locomotion Assay
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2025
This video demonstrates the use of a radial locomotion assay to evaluate motor dysfunction in C. elegans expressing either wild-type or ALS-mutant human TDP-43 protein. Worms with varying levels of wild-type or mutant TDP-43 expression are allowed to crawl, and their movement is measured by the radial distance traveled from the central point on the assay plate. The assay distinguishes between mild, moderate, and severe motor impairments based on the distance traveled by the different C. elegans...
01:11
Assessment of radial pulse
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2024
Assessment of Radial Pulse The radial pulse, located at the wrist, is often the preferred site for assessing peripheral pulse because of its accessibility and dependability. The process of determining the radial pulse involves several steps: Hand Hygiene: • Begin by performing hand hygiene to prevent the transmission of microorganisms. Preparation: • Identification: Verify the patient's identity to ensure accurate and safe care. • Determination: Assess the need for pulse...
08:09
Use of an Eight-arm Radial Water Maze to Assess Working and Reference Memory Following Neonatal Brain Injury
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Cited by 61 •
2013
The eight-arm radial water maze is designed to evaluate reference and working memory performance simultaneously by requiring subjects to use extra-maze cues to locate escape platforms and remedies the limitations observed in land based radial arm maze designs.
02:59
Time-Lapse Imaging of Cortical Neuron Radial Migration in Transduced Mouse Embryonic Brain Slices
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2025
Source: Wiegreffe, C., et. al., Time-lapse Confocal Imaging of Migrating Neurons in Organotypic Slice Culture of Embryonic Mouse Brain Using In Utero Electroporation. J. Vis. Exp. (2017) This video demonstrates time-lapse confocal microscopy to observe cortical neuron radial migration from the subventricular zone to the cortical plate via radial glial scaffolds in transduced mouse embryonic brain slices.
FAQs
Radial spokes act as signaling links between the central pair and dynein motor arms. Their position within the axoneme allows information associated with the central pair to reach motors operating on peripheral microtubule doublets. This coordination helps regulate when and how sliding occurs, rather than allowing motor activity to produce uncoordinated movement.
Dynein uses ATP to generate sliding between adjacent microtubules, but the axoneme does not simply lengthen as the doublets move. Structural constraints within this scaffold redirect that relative sliding into bending. Radial spokes matter because their organized connections help couple motor-generated force to the architecture that produces a controlled ciliary or flagellar beat.
Radial spokes are relevant to more than whether a cilium or flagellum moves at all. Their architecture and signaling function help determine the beat pattern, direction, and efficiency of that movement. Consequently, analyzing spoke organization can connect molecular structure with whole-axoneme performance, showing how a protein complex influences the quality and orientation of cellular motion.
Researchers can approach them through two linked questions: what is the architecture of the spoke complex, and how does that architecture affect axonemal function? Relating structural observations to dynein-driven microtubule sliding and resulting bending provides a mechanistic interpretation. This strategy helps explain motion rather than treating beat behavior as an isolated cellular output.
These complexes connect molecular regulation to several biological outcomes. In motile cilia, their function is relevant to moving fluids; in flagella, it is relevant to cell propulsion. The same framework also supports investigation of ciliary signaling. Thus, radial-spoke research links axonemal mechanics with fluid movement, locomotion, and signaling-related cell biology.
Defects in spoke components can disrupt the coordination needed for effective axonemal motion, producing impaired ciliary or flagellar motility. Investigating these defects gives researchers a route from altered protein architecture to abnormal movement and, ultimately, human disease. The topic therefore has both a basic-biology role and medical relevance grounded in motility disorders.