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Nerve whiz

Nerve Whiz
An indispensable tool for diagnosing focal lesions of the peripheral nervous system

Designed by a neuromuscular neurologist at the University of Michigan, Nerve Whiz is a free application for medical professionals interested in learning the complex anatomy of nerve roots, plexuses, and peripheral nerves. Nerve Whiz goes beyond simple innervation charts to help you interpret your clinical examination. Select which muscles are weak, or point to where the patient has sensory loss, and the application will provide you with a differential diagnosis of localizations, complete with relevant pictures and diagrams.


Nerve and Muscle Charts

This comprehensive inventory of the most clinically relevant muscles in the upper and lower extremities can be sorted by root, trunk, cord, peripheral nerve, action, or muscle name.

Muscle Localizer

Where is your patient weak? You do the physical exam, and Nerve Whiz localizes the lesion for you. Enter which muscles are weak or strong, and the application provides a list of possible localizations (root, plexus, or nerve) that match your exam, along with distinguishing features about each.

Nerve Diagrams

Choose any localization (root, trunk, cord, or nerve), and see a diagram of that nerve in the context of the brachial or lumbosacral plexus. Toggle to "Muscle View" and the diagram shows you the muscles supplied by your chosen nerve, and from where their innervations arise.

Sensory Localizer

Where is your patient numb? Touch the picture of the arm or leg and Nerve Whiz suggests localizations with beautiful graphic representations of the sensory distributions of nerve roots, parts of the plexus, and nerves.
Nerve and Muscle Charts   Muscle Localizer   Muscle Localizer   Muscle Localizer


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Designed by Zach London, M.D.
Department of Neurology, University of Michigan

This application was funded through the generosity of the Jerry Isler Neuromuscular Fund.


Nerve Whiz is intended to be an educational tool only. Nerve distributions vary between patients, and central or multifocal processes can mimic focal peripheral lesions. As such, this application should not be relied upon to make clinical decisions.

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