Stimulation single-fiber EMG in infant botulism

Chaudhry, Vinay; Crawford, Thomas O.

doi:10.1002/(sici)1097-4598(199912)22:12<1698::aid-mus12>3.0.co;2-k

Cited by 41 publications

(11 citation statements)

References 35 publications

(40 reference statements)

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“…Thus, jitter in infants and young children should be considered abnormal only if the mean jitter is markedly increased, and it is more convincing if there is blocking in at least 10% of potentials. In an earlier study of 4 patients with infant botulism, jitter measured with SFEMG electrodes in a hand muscle during stimulation exceeded 90 μs in all fibers reported, whereas the mean jitter in the orbicularis oculi in the patient reported by Verma et al . was 42 μs, with blocking in only 7% of potentials.…”

mentioning

confidence: 74%

Stimulated jitter in infant botulism

Sanders

2015

Muscle and Nerve

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mentioning

confidence: 74%

Stimulated jitter in infant botulism

Sanders

2015

Muscle and Nerve

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“…Slow repetitive nerve stimulation at 3 Hz may show a decrement with a significant increment or facilitation following exercise or high frequency stimulation (figure 1). However, in severe botulism, the neuromuscular junction may be so blocked that facilitation or increment in CMAP may not be seen 7 8…”

Section: Discussionmentioning

confidence: 99%

Infant botulism following honey ingestion

et al. 2012

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“…However, even for focal forms, SFEMG is regarded as a very sensitive diagnostic test. [26][27][28] On the other hand, an abnormal SFEMG study is not specific for MG. Any disorder of neuromuscular transmission is likely to yield abnormal SFEMG findings, 4,6,29,30 and SFEMG abnormalities also are common in some neuropathic and myopathic disorders. 1,5 In volitional or voluntary SFEMG, the SFEMG electrode is positioned to record simultaneously from 2 (or more) single muscle fibers belonging to the same motor unit when the patient contracts the specific muscle.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Jitter by Stimulated Single-Fiber Electromyography in Normal Dogs

et al. 2003

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Single-fiber electromyography (SFEMG), a technique used to investigate neuromuscular transmission, has been described previously in the pelvic limb of dogs. Because preferential involvement of isolated muscle groups can occur in disorders of neuromuscular transmission, SFEMG was done in the peroneus longus (PL), extensor carpi radialis (ECR), and orbicularis oculi (OO) muscles of 10 adult, clinically normal dogs. Jitter was calculated as the mean absolute value of the consecutive differences in latency of 50 single muscle fiber action potentials after stimulation of intramuscular nerve bundles at the level of the motor point in at least 20 muscle fibers per muscle. Bilateral recordings were performed in 3 dogs. Mean jitter values were determined for each muscle, and differences among muscle groups and among dogs were compared. The upper limits of mean consecutive difference (mean plus 3 standard deviations) for the PL, ECR, and OO muscles were 21.94, 22.53, and 23.39 micros, respectively, and the upper limit of mean consecutive difference for individual muscle fibers in the respective fiber pools was 28.62, 36.39, and 35.68 micros. Jitter values for the ECR and OO were significantly higher than the jitter value for the PL muscle (P < .05). Significant differences among muscles or dogs or between sides were not observed for the ECR. Significant differences among dogs were observed for OO jitter values and were attributed to extremely low jitter values in 1 dog. Significant differences were demonstrated between sides for the PL and were attributed to small sample size. Results of this study provide normative data that can be used in the application of the stimulated SFEMG technique to dogs with suspected disorders of neuromuscular transmission.

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Stimulation single-fiber EMG in infant botulism

Cited by 41 publications

References 35 publications

Stimulated jitter in infant botulism

Stimulated jitter in infant botulism

Infant botulism following honey ingestion

Evaluation of Jitter by Stimulated Single-Fiber Electromyography in Normal Dogs

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