PMC6749751_01
Surface EMG recording from lower limbs while the patient was standing. Recordings from Bilateral Quadriceps, Hamstrings, Gastrocnemius, and Tibialis Anterior revealed a 15-16 Hz Tremor with a Burst Duration of about 25 ms.
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We also observed a mild asymmetry in the amplitude of the EMG bursts, with increased amplitude of the tremor bursts in the right leg which corresponded with the clinical observation of asymmetry (Figure 1).
Surface EMG Recording of Right Wrist Extensors and Flexors while the Arm Was at Rest Revealed a 5 Hz Tremor. The 15-16 Hz recording obtained from the gastrocnemius and tibialis anterior establishes the presence of two different types of tremors.
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Surface EMG recordings from the right wrist extensor and flexor muscles while the arm was at rest revealed a 5 Hz co-contraction tremor (Figure 2).