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  Indian J Med Microbiol
 

Figure 1: Spiral drawing in a patient with myoclonus shows spikes highlighted by blue arrows. (A) Horizontal line drawing demonstrates spikes due to interruption by myoclonus. (B) Spiral drawings of two different patients with essential tremor show predominant unidirectional axis (left side) (C) and saw-tooth appearance (right side) (D) due to tremor

Figure 1: Spiral drawing in a patient with myoclonus shows spikes highlighted by blue arrows. (A) Horizontal line drawing demonstrates spikes due to interruption by myoclonus. (B) Spiral drawings of two different patients with essential tremor show predominant unidirectional axis (left side) (C) and saw-tooth appearance (right side) (D) due to tremor