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,…
The analysis of spontaneous activity is the first part of the needle electromyography (EMG) examination of every muscle. The presence of abnormal spontaneous activity on EMG is of key importance and yields several important pieces of information. First, the distribution…
Upper Extremity Median Nerve Abductor Pollicis Brevis (APB) ( Fig. 13.1A,B ) Innervation Median nerve, medial cord, lower trunk, C8–T1 Needle Insertion Insert the needle tangentially into the lateral thenar eminence, just lateral to the mid-point of the first metacarpal.…
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Tibial Motor Study ( Fig. 11.1 ) Recording Site Abductor hallucis brevis (AHB) muscle: G1 placed 1 cm proximal and 1 cm inferior to the navicular prominence G2 placed over the metatarsal-phalangeal joint of the great toe Stimulation Sites Medial…
Median Motor Study ( Fig. 10.1 ) Recording Site Abductor pollicis brevis (APB) muscle (lateral thenar eminence): G1 placed over the muscle belly G2 placed over the first metacarpal-phalangeal joint Stimulation Sites Wrist: Slightly lateral to the mid-wrist between the…