Electrodiagnosis in Diseases of Nerve and Muscle: Principles by Jun Kimura

By Jun Kimura

Here's the Fourth version of the vintage textual content Electrodiagnosis in ailments of Nerve and Muscle: rules and Practice. With every one next variation, Dr. Kimura has equipped upon his broad adventure instructing electromyography (EMG) around the globe and has transferred his wisdom to the booklet. it truly is meant for clinicians who practice electrodiagnostic strategies as an extension in their scientific exam, and should be of worth to neurologists and physiatrists who're drawn to neuromuscular problems and noninvasive electrodiagnostic tools, quite these practising electromyography (EMG). The publication offers a complete evaluate of so much peripheral nerve and muscle ailments, together with particular recommendations and destinations for appearing every one test.

While the e-book has been completely up-to-date to mirror the expansion that has been made within the box due to the fact that 2001, a DVD has additionally been additional to the booklet, permitting the readers to monitor and hear a variety of kinds of general and irregular EMG actions.

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Extra info for Electrodiagnosis in Diseases of Nerve and Muscle: Principles and Practice

Example text

INTRODUCTION The nervous system conveys information by means of action potentials, which, under physiologic conditions, originate in the cell body or axon terminal and propagate along the nerve fibers. An electrophysiologic study takes advantage of such neural impulses activated artificially by electrical stimuli applied at certain points of the nerve. Motor conduction studies depend on recording a muscle action potential elicited by stimulation of the mixed nerve, whereas sensory studies use either mixed or sensory nerve action potentials (SNAPs).

Saphenous Nerve The saphenous nerve, the largest and longest sensory branch of the femoral nerve, receives the maximum innervation from L3 and L41 and supplies the skin over the medial aspect of the thigh, leg and foot. It accompanies the femoral artery in the femoral triangle then descends medially under the sartorius muscle. At the lower thigh, the nerve gives off the infrapatellar branch that supplies the medial aspect of the knee. The main terminal branch descends along the medial aspect of the leg accompanied by the long saphenous vein.

Its axons, chiefly derived from C5 and C6, reach the biceps, brachialis, and coracobrachialis, with some variations of innervation for the last two muscles. Its terminal sensory branch, called the lateral antebrachial cutaneous nerve, with fibers mainly from the C6 root, supplies the skin over the lateral aspect of the forearm. Axillary Nerve The axillary nerve, originating from C5 and C6, arises from the posterior cord as the last branch of the brachial plexus. The nerve traverses a quadrangular space bounded rostrally by the subscapularis anteriorly and teres minor posteriorly, caudally by the teres major, medially by the long head of triceps, and laterally by the humeral A coracobrachialis B biceps brachialis 1 flexor carpi ulnaris flexor digitorum profundus III & IV 2 3 adductor pollicis flexor pollicis brevis dorsal interosseous I palmar interosseous I dorsal interosseous II abductor digiti minimi opponens digiti minimi flexor digiti minimi lumbrical IV palmar inerosseous III lumbrical III dorsal inerosseous IV palmar inerosseous II dorsal interosseous III FIGURE 1-9 Musculocutaneous nerve (A) and ulnar nerve (B) and the muscles they supply.

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