In a patient with isolated, progressive hand numbness and weakness, there is a much to be learned about the clinical exam. Often, its all you need. This week, Dr. Aakriti Kothiwal (Cooper University Hospital) presents this week's clinical case and helps localize the lesion. Produced by James E. Siegler and Aakriti Kothiwal. Music courtesy of Jazzar, Lee Rosevere, and Loyalty Freak Music. Sound effects by Mike Koenig and Daniel Simion. BrainWaves' podcasts and online content are intended for medical education only and should not be used for clinical decision making. Be sure to follow us on Twitter @brainwavesaudio for the latest updates to the podcast. REFERENCES Gross PT and Jones HR, Jr. Proximal median neuropathies: electromyographic and clinical correlation. Muscle Nerve. 1992;15:390-5. Gross PT and Tolomeo EA. Proximal median neuropathies. Neurol Clin. 1999;17:425-45, v. Peters N, Muller-Schunk S, Freilinger T, During M, Pfefferkorn T and Dichgans M. Ischemic stroke of the cortical "hand knob" area: stroke mechanisms and prognosis. Journal of neurology. 2009;256:1146-51. Bouche P. Compression and entrapment neuropathies. Handbook of clinical neurology. 2013;115:311-66. Padua L, Coraci D, Erra C, Pazzaglia C, Paolasso I, Loreti C, Caliandro P and Hobson-Webb LD. Carpal tunnel syndrome: clinical features, diagnosis, and management. The Lancet Neurology. 2016;15:1273-1284. Aamodt WW, Siegler JE and Elman L. Teaching NeuroImages: Acute infarction of the left medial lemniscus masquerading as a peripheral neuropathy. Neurology. 2017;88:e178. Hobson-Webb LD and Juel VC. Common Entrapment Neuropathies. Continuum (Minneap Minn). 2017;23:487-511.