Fig. 10.1 Position of the stimulating and recording electrodes when assessing jitter in the left orbicularis oculi The stimulation is given individually by single shocks gradually increasing the intensity until…
Fig. 6.1 Populations of ACh vesicles in the terminal nerve space (RRP: rapid release pool, recycling pool, reserve pool) Released ACh binds to receptors (AChRs) on the post-synaptic membrane (two…
Fig. 8.1 Changes to motor evoked potentials (MEPs) during corpus callosotomy following placement of interhemispheric retractor resulting in loss of MEPs to lower extremities (arrow). Note changes recorded primarily from…
Patient factors Age Height and/or length Weight Temperature Anatomic variability (e.g., Martin-Gruber anastamosis) Environmental factors Electrical (60 Hz) interference Drug administration (pyridostigmine, neuromuscular blockade, botox) Machine/operator factors Stimulation malposition Electrode…
1. Routine sensory and motor nerve conduction studies • At least one upper and one lower extremity • It is preferable to focus on symptomatic extremities 2. Repetitive nerve stimulation • Low frequency repetitive stimulation…
© Springer International Publishing AG 2017Hugh J. McMillan and Peter B. Kang (eds.)Pediatric Electromyographyhttps://doi.org/10.1007/978-3-319-61361-1_26 26. Epilogue Peter B. Kang1 and Hugh J. McMillan2 (1) Division of Pediatric Neurology, Shands Children’s Hospital, University of Florida College of Medicine, Gainesville, FL,…
Age Amplitude (μV) Conduction velocity (m/s) Median nerve Term newborn ≥3.5 ≥22 0–1 month ≥3.5 ≥24 1–3 months ≥5 ≥25 3–6 months ≥5 ≥32 6–12 months ≥5 ≥33 1–2 years…
Clinical Electrodiagnostic Facial bulbar weak Respiratory distress Other Contractures NCS Rep stim/SFEMG EMG Anterior horn cell Spinal muscular atrophy Common Possible Bell shaped chest Uncommon Low CMAP Normal Neurogenic…
Fig. 14.1 Standard diagram explaining the concept of electrical impedance showing both capacitive and inductive reactance values (XC and XL), with signs reversed for convenience, resistance, and the impedance (Z)…
Fig. 12.1 Representative examples of single motor unit potentials (SMUPs) stimulating the right ulnar nerve and recording abductor digiti minimi using the multipoint approach. One set of SMUPs had amplitudes…
