Expanding the Clinical Spectrum of Head Snap Sign

Ethical Compliance Statement: Ethical approval was not required for this single-patient case report in accordance with the policies of our institutional ethics committee. We confirm that we have read the Journal's position on issues involved in ethical publication and affirm that this work is consistent with those guidelines. Verbal and written informed consent for publication and authorization to share videotape was obtained from the patient. Funding Sources and Conflict of Interest: No specific funding was received for this work. The authors declare that there are no conflicts of interest relevant to this work. Financial Disclosures for the Previous 12 Months: IE, BÇA, MYS, NHY, GK declare that there are no additional disclosures to report. AZ reports to have relevant proctorship, consultancy and honorarium relationships with Boston Scientific, NeuroBio, Abbott, and Insightec. AML reports receiving consultancies from Boston Scientific, Abbott, Functional Neuromodulation and Insightec. AF reports receiving consultancies from Abbvie, Ceregate, Medtronic, Boston Scientific, Iota, Inbrain, Inbrain Pharma; honoraria from Abbvie, Medtronic, Boston Scientific, Sunovion, Chiesi farmaceutici, UCB, Ipsen; grants from University of Toronto, Weston foundation, Abbvie, Medtronic, Boston Scientific, CIHR. No datasets were generated or analyzed during the preparation of this case report.