@article{2755cb5c1a2c468f843b0a4aac62a1db,
title = "The “head snap”: A subtle clinical feature during the finger-nose-finger maneuver in essential tremor",
abstract = "Background: Essential tremor is characterized by several hyperkinetic movements, including arm and head tremors. We report another movement of the head in patients with essential tremor, which we term the “head snap.” This was observed as a jerking motion of the head in some patients while they performed the finger- nose-finger maneuver. Methods: We compared the prevalence of the head snap in essential tremor patients vs. Parkinson{\textquoteright}s disease patients. We also assessed the clinical correlates of the head snap. Results: Ten (20%) of 50 essential tremor patients exhibited a head snap of any severity (rating ≥0.5) vs. 0 of 50 Parkinson{\textquoteright}s disease patients (p50.001). Patients with head snap had more severe arm tremor on Archimedes spiral drawings (p50.019) and were more likely to have head tremor (p50.03) than those without it. Conclusions: This sign could be a useful aid in the clinical diagnosis of tremor.",
keywords = "Clinical, Diagnosis, Essential tremor, Examination, Parkinson{\textquoteright}s disease",
author = "Sternberg, {Eliezer J.} and Alcalay, {Roy N.} and Levy, {Oren A.} and Louis, {Elan D.}",
note = "Funding Information: * To whom correspondence should be addressed. E-mail: EDL2@columbia.edu Editor: Julian Benito-Leon, Hospital {\textquoteleft}{\textquoteleft}12 de Octubre{\textquoteright}{\textquoteright}, Madrid, Spain Received: February 13, 2013 Accepted: March 11, 2013 Published: April 18, 2013 Copyright: {\textquoteright} 2013 Sternberg et al. This is an open-access article distributed under the terms of the Creative Commons Attribution–Noncommercial–No Derivatives License, which permits the user to copy, distribute, and transmit the work provided that the original author(s) and source are credited; that no commercial use is made of the work; and that the work is not altered or transformed. Funding: This research was funded by R01 NS039422 from the National Institutes of Health (NIH). Financial disclosures: None. Conflict of interest: The authors report conflicts of interest. Publisher Copyright: {\textcopyright} 2013 Sternberg et al.",
year = "2013",
doi = "10.5334/TOHM.125",
language = "English (US)",
volume = "3",
journal = "Tremor and Other Hyperkinetic Movements",
issn = "2160-8288",
}