In the electromyography (EMG) laboratory, the radial nerve is studied less frequently than the median and ulnar nerves and their respective well-known lesions. Nevertheless, entrapment of the radial nerve does occur, often affecting the main radial nerve either in the…
Ulnar neuropathy at the wrist (UNW) is a rare condition that sometimes is confused with ulnar neuropathy at the elbow (UNE) or, more often, with early motor neuron disease. Knowledge of the detailed anatomy of the ulnar nerve at the…
Ulnar neuropathy at the elbow (UNE) is second only to median nerve entrapment at the wrist (i.e., carpal tunnel syndrome [CTS]) as the most common entrapment neuropathy affecting the upper extremity. In contrast to CTS, localizing the site of the…
Proximal median neuropathy is distinctly uncommon compared with median nerve entrapment at the carpal tunnel. Differentiating between median neuropathy at the wrist and more proximal entrapments can be difficult based on clinical grounds alone, especially in mild cases. Electrodiagnostic (EDX)…
Median nerve entrapment at the wrist is the most common of all entrapment neuropathies and, consequently, is one of the most frequent reasons for referral for an electrodiagnostic (EDX) study. In nearly all patients, the usual site of compression occurs…
Although neuromuscular ultrasound has been used mostly in mononeuropathies, there are also some specific advantages to using it in selected polyneuropathies, motor neuron disorders, and myopathies. In this chapter, we summarize the basic ultrasound assessments that can be done in…
One of the most common and useful applications of neuromuscular ultrasound is in the evaluation of mononeuropathies. Although mononeuropathies often result from entrapment of isolated peripheral nerves within specific anatomic fibro-osseous canals, there are a variety of other causes, many…
In previous editions of this textbook, one did not find any mention of neuromuscular ultrasound. However, since the last edition, much has changed in the field of neuromuscular medicine. The value of neuromuscular ultrasound in the evaluation of patients with…
The value of information gained from electrodiagnostic studies relies on correct data collection and, even more importantly, correct data interpretation. Mastering the technical aspects of routine nerve conduction studies (NCSs) and electromyography (EMG) usually can be accomplished within several months…
After assessment of insertional and spontaneous activity, the needle electromyography (EMG) examination moves on to the evaluation of motor unit action potentials (MUAPs). In a process similar to the analysis of spontaneous activity, MUAPs must be assessed for morphology (duration,…