Mechanical Temporal Summation
Mechanical Temporal Summation - Related Videos
01:25
Summation Notation
0 Views •
2025
Sigma notation, also known as summation notation, provides a concise method for representing the sum of a sequence of terms that follow a regular pattern. It utilizes the uppercase Greek letter sigma (∑), A typical expression is:In this form, k the index of summation is 1, the starting value, and n the ending value. The term ak represents the general term of the sequence.For example, the increasing sequence 5, 7, 9, ..., 23 over 10 terms can be expressed as:This simplifies the representation...
12:30
A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures
0 Views •
Cited by 33 •
2014
The present work provides a comprehensive set of guidelines for manually tracing the medial temporal lobe (MTL) structures. This protocol can be applied to research involving structural and/or combined structural-functional magnetic resonance imaging (MRI) investigations of the MTL, in both healthy and clinical groups.
11:49
Quantitative and Temporal Control of Oxygen Microenvironment at the Single Islet Level
0 Views •
Cited by 10 •
2013
Microfluidic oxygen control confers more than just convenience and speed over hypoxic chambers for biological experiments. Especially when implemented via diffusion through a membrane, microfluidic oxygen can provide simultaneous liquid and gas phase modulations at the microscale-level. This technique enables dynamic multi-parametric experiments critical for studying islet pathophysiology.
12:45
Mechanical Stimulation of Chondrocyte-agarose Hydrogels
0 Views •
Cited by 29 •
2012
The biosynthesis of cartilaginous extracellular matrix by chondrocytes can be affected by application of mechanical stimuli. This method describes the technique of applying dynamic compressive strains to chondrocytes encapsulated in 3D constructs and the evaluation of induced changes in chondrocyte metabolism.
11:52
Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps
0 Views •
2017
The segmentation clock drives oscillatory gene expression across the pre-somitic mesoderm (PSM). Dynamic Notch activity is key to this process. We use imaging and computational analyses to extract temporal dynamics from spatial expression data to demonstrate that Delta ligand and Notch receptor expression oscillate in the vertebrate PSM.
FAQs
Repeated nociceptive input can produce activity-dependent facilitation in spinal dorsal horn neurons, with NMDA receptors contributing to that increased responsiveness. As signaling becomes progressively amplified, an identical mechanical stimulus may generate a stronger nociceptive response. This mechanism makes the paradigm useful for studying how repeated peripheral input can engage central pain-processing changes.
The mechanical stimulus begins at peripheral nociceptors, but the progressively stronger response reflects more than stimulus delivery alone. Increased signaling in spinal dorsal horn neurons provides evidence of central amplification, helping investigators examine central sensitization and hyperalgesia. This distinction is important when characterizing whether abnormal pain processing extends beyond the initial peripheral activation.
Keeping pressure or pinprick stimuli identical allows the changing pain or nociceptive response to be interpreted as a consequence of repeated stimulation rather than increasing stimulus strength. Delivered over a short period, this controlled sequence reveals activity-dependent changes in processing. Consistency therefore supports clearer assessment of temporal summation and central amplification.
A researcher applies repeated pressure or pinprick stimuli of the same type and intensity over a short period, then records the perceived pain or nociceptive response across the sequence. Comparing responses from earlier and later stimuli shows whether signaling becomes progressively amplified. The resulting pattern can be used as a quantitative measure in pain research.
Within quantitative sensory testing, repeated mechanical stimulation provides a structured way to measure changes in pain perception or nociceptive responsiveness. The test can help characterize temporal summation and identify patterns consistent with hyperalgesia or central sensitization. Its value comes from converting a repeated-stimulation response into information about altered pain processing.
Chronic pain research uses this response pattern to investigate mechanisms of abnormal pain amplification rather than relying only on a single stimulus response. Findings can support characterization of central sensitization and hyperalgesia, helping researchers compare pain-processing profiles. The approach may also inform studies of treatments designed to target abnormal central pain processing.