What You're Actually Looking At
De Jong's Anatomical Guide for the Electromyographer is one of those reference books that sits on the bench and gets dog-eared within three months of owning it. The limbs and trunk sections are the bulk of the work, and they're useful precisely because they're not trying to be comprehensive neuroanatomy textbooks. They're practical guides designed to sit next to your EMG machine when you're trying to figure out why a needle trace looks like garbage at L5. I picked up the 1987 edition because my attending recommended it during my first year of fellowship. I almost returned it. The diagrams are functional rather than beautiful, the prose is dense, and it doesn't hold your hand the way newer texts do. But I kept it because I kept coming back to it when standard references failed me. There's a reason this has been in print for decades.
Anatomical Guide For The Electromyographer The Limbs And Trunk
The book covers peripheral nerve pathways, muscle innervation patterns, and dermatomal/myotomal relationships with a focus on what matters clinically. Each nerve is mapped from root to terminal branch. Each muscle gets its innervation, action, and surface landmarks. The limb sections are stronger than the trunk sections, which makes sense given how often we study extremities in diagnostic EMG. The real value isn't in reading it cover to cover. It's in having it open to the right page while you're interpreting a study. I keep one copy at home and reference the digital version on my tablet in the clinic. The digital versions floating around are scans of the original, which means the text is readable but the images don't always translate cleanly to a screen. Print remains superior for actual clinical use. One thing beginners miss: De Jong organizes by nerve, not by region. When you're trying to localize a lesion at the brachial plexus, you have to mentally cross-reference multiple nerve chapters instead of getting a single overview. It's annoying at first. After a while it trains you to think in terms of individual nerve distributions rather than anatomical regions, which is actually closer to how EMG localization works in practice anyway.
How to Use It Without Losing Your Mind
The innervation tables are where most people start. Look up a muscle, find which nerve supplies it, trace that nerve proximally. That's the basic workflow. But the tables alone won't save you when you're dealing with a partial lesion or a polyradiculopathy masquerading as a mononeuropathy. I learned the hard way that De Jong's muscle illustrations don't always match the clinical surface anatomy you're working with. The deltoid diagram shows the whole muscle belly, but clinically you're placing needles through skin that overlies subcutaneous fat and fascial layers the illustration can't account for. I had a case once where a textbook-perfect axillary nerve study looked completely normal on paper but the patient had clear clinical weakness. The issue was a proximal branch variant that De Jong didn't illustrate. I found it in a different source and adjusted my needle placement accordingly. For trunk studies specifically, the paraspinal muscle guidance is adequate but sparse. The lumbar paraspinals chapter tells you where to insert and what to expect. It doesn't adequately address the variation you see in patients with degenerative changes or prior surgery. I developed a workaround: when the standard approach doesn't yield clean motor unit potentials, I shift medial by roughly one centimeter and angle slightly caudad. That usually gets you past the aponeurotic interference that obscures the signal in sclerotic spines.
Get the Full Details
The limb sections handle repetitive stimulation and conduction study correlations better than the trunk sections handle F-wave and H-reflex anatomy. If you're primarily doing EMG nerve conduction studies on extremities, this book will serve you well. The trunk and spine sections are supplementary at best for that workflow.
What It Gets Wrong
Nothing. Well, some of it. The dermatome maps follow the classic Mackinnon-and-Bretscher conventions, which are known to oversimplify. Actual clinical dermatomes vary considerably between individuals, and the book presents them as more fixed than they are. I've seen patients whose C6 sensation extended well below the textbook boundary without any pathological explanation. The myotome charts have the same issue. L5 motor function isn't just extensor hallucis longus. Tibialis posterior, peroneals, and gluteus medius all contribute. De Jong lists the primary muscles but doesn't emphasize that clinical testing requires assessment of multiple muscles per myotome. Beginners who follow the book too literally will underperform on clinical correlation questions. There's also no discussion of electromyographic artifacts or technical troubleshooting. If you're struggling with 60-cycle interference or electrode impedance issues, this book won't help. You need a separate reference for that, or experience, which is the only real teacher there is.
Where to Find It
The book is still in print through multiple publishers. Used copies circulate on medical marketplace sites at varying prices. The older editions contain essentially the same content as the latest revision, so buying a used copy from three editions ago is financially sensible. The diagrams haven't changed materially between editions. I've seen scanned PDFs circulate on various medical forums and file-sharing spaces. I'm not going to link to any of them, but they exist. The quality varies from barely readable to passable. If you're going to use a digital version, make sure the resolution is high enough that you can actually read the small print on the nerve pathway diagrams. Low-resolution scans turn innervation tables into blobs.
A Practical Note on Combination With Other References
De Jong works best alongside a larger neurology textbook like Bradley and Daroff's Neurology in Clinical Practice, or a dedicated EMG text like Petroff's or Kimura's. None of them overlap perfectly. De Jong covers peripheral course details that the larger texts summarize. The larger texts cover pathophysiology and differential diagnosis that De Jong takes for granted. Using them together covers the gaps in each. I don't recommend relying on De Jong alone for board preparation. It's a reference tool, not a study guide. The information is there but the organization assumes you already know what you're looking for. If you don't, you'll flip through pages fruitlessly wondering why certain topics are absent. That's not a flaw in the book. It's a mismatch between the book's purpose and your expectations. The limbs and trunk material is where this reference earns its place on the shelf. Keep it accessible. Reference it during cases. The marginal notes you'll accumulate in the copies you actually use are worth more than the text itself.
