Single Fiber Emg
Single Fiber Emg - Related Videos
03:55
In Vivo Single-Fiber Recording of Sciatic Nerve C-Fibers in Rats
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2025
This video demonstrates a single-fiber recording of C-fiber nerve conduction in rats. An anesthetized rat is incised to expose the sciatic nerve, which provides sensory and motor supply to the lower limbs. The individual C-fibers are then exposed. Electrical stimulation is provided using stimulus electrodes implanted in the foot, and a response is recorded from a single nerve fiber.
07:16
Extraction of the EPP Component from the Surface EMG
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Cited by 2 •
2009
The endplate potential (EPP) component can be extracted from the surface EMG using a digital filter. The extracted EPP shows oscillation with a frequency of about 30 Hz.
11:31
Functional Near Infrared Spectroscopy of the Sensory and Motor Brain Regions with Simultaneous Kinematic and EMG Monitoring During Motor Tasks
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Cited by 16 •
2014
Monitoring brain activity during upright motor tasks is of great value when investigating the neural source of movement disorders. Here, we demonstrate a protocol that combines functional near infrared spectroscopy with continuous monitoring of muscle and kinematic activity during 4 types of motor tasks.
08:28
Microfluidic Dry-spinning and Characterization of Regenerated Silk Fibroin Fibers
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Cited by 6 •
2017
A protocol for the microfluidic spinning and microstructure characterization of regenerated silk fibroin monofilament is presented.
11:25
Simultaneous Scalp Electroencephalography (EEG), Electromyography (EMG), and Whole-body Segmental Inertial Recording for Multi-modal Neural Decoding
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Cited by 28 •
2013
Development of an effective brain-machine-interface (BMI) system for restoration and rehabilitation of bipedal locomotion requires accurate decoding of user's intent. Here we present a novel experimental protocol and data collection technique for simultaneous non-invasive acquisition of neural activity, muscle activity, and whole-body kinematics during various locomotion tasks and conditions.
FAQs
Neuromuscular jitter measures variation in the timing between discharges from related muscle fibers. Increased or abnormal timing can signal impaired neuromuscular transmission, making jitter a particularly sensitive indicator of dysfunction at the connection between nerve activity and muscle-fiber activation. This measurement is valuable when subtle transmission abnormalities are not evident in broader electrophysiological recordings.
Fiber density complements jitter by supplying a different measurement of neuromuscular function. Whereas jitter focuses on discharge timing, density contributes additional information when clinicians evaluate abnormalities associated with motor-unit diseases. Considering both measures can broaden interpretation of an SFEMG study rather than relying on a single indicator of dysfunction.
Voluntary contraction and stimulation offer two ways to generate the electrical activity needed for analysis. In either case, the fine needle electrode detects action potentials from nearby muscle fibers. Using these recording conditions allows investigators to examine neuromuscular behavior under more than one activation condition rather than restricting assessment to a single source of activity.
Acquisition begins with a fine needle electrode detecting action potentials from nearby muscle fibers. The recording is made while the muscle contracts voluntarily or while activity is produced through stimulation. The resulting signals are examined for neuromuscular jitter and fiber density, producing complementary measures of neuromuscular function.
SFEMG is especially useful when the clinical question concerns subtle neuromuscular transmission abnormalities. Its measurements can support evaluation of disorders such as myasthenia gravis and other motor-unit diseases. The technique does not replace broader testing; instead, it adds sensitive information that may help reveal dysfunction conventional recordings do not show.
Nerve conduction studies and conventional EMG provide broader electrophysiological information, whereas SFEMG focuses on highly localized activity from individual muscle fibers. Because the methods examine neuromuscular function at different levels of detail, combining them can improve the overall assessment of suspected dysfunction and expose abnormalities that broader recordings may miss.