
Figure 1
Archimedes spiral drawings in functional and essential tremor. (A–C) Spirals from patients with functional tremor showing the stretch slinky sign (looping). (D–F) Spirals from patients with essential tremor, where looping is also observed.

© 2025 Aditya Murgai, Gala Prado Miranda, Guillermo Trocha Ramos, published by Ubiquity Press
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