Neupsy Key

3 Basic Nerve Conduction Studies After the history is taken and a directed physical examination is performed, every study begins with the nerve conduction studies (NCSs). The needle electromyography (EMG)…

22 Peroneal Neuropathy Peroneal neuropathy is one of the most common mononeuropathies in the lower extremity. Most often, peroneal neuropathy occurs at the fibular neck, where the nerve is quite…

28 Atypical Motor Neuron Disorders There are a heterogeneous group of motor neuron disorders that are rare but nonetheless important to recognize, because they often can mimic the presentation of…

35 Myopathy In the evaluation of patients with suspected myopathy, molecular genetics has supplanted the need for electrodiagnostic (EDX) studies or muscle biopsy in many patients with inherited conditions. Moreover,…

20 Ulnar Neuropathy at the Wrist Ulnar neuropathy at the wrist (UNW) is a rare condition that sometimes is confused with ulnar neuropathy at the elbow (UNE) or, more often,…

2 Anatomy and Neurophysiology The electromyographer need not have detailed knowledge of all the electrical and chemical events that occur at a molecular level in order to perform an electrodiagnostic…

9 Basic Statistics for Electrodiagnostic Studies For every electrodiagnostic (EDX) test performed, one needs to decide if the study is normal or abnormal. That determination often needs to be made…

33 Sciatic Neuropathy Sciatic neuropathies are uncommon in the electromyography (EMG) laboratory. When they occur, patients often present in a manner similar to that of peroneal neuropathy. Indeed, a footdrop…

23 Femoral Neuropathy Isolated lesions of the femoral nerve are uncommon in the electromyography (EMG) laboratory. More common are lesions of the lumbar plexus or L2–L4 nerve roots, which may…

18 Proximal Median Neuropathy Proximal median neuropathy is distinctly uncommon compared with median entrapment at the carpal tunnel. Differentiating between median neuropathy at the wrist and more proximal entrapments can…