1 MCQs in Medicine for NEET PG
A 42-year-old woman presents with a 3-year history of involuntary head rotation to the right with associated neck muscle tension and tremor. Clinical examination reveals sustained contraction of the right sternocleidomastoid and splenius capitis muscles. EMG mapping is performed, and the trace shows the pattern marked **B** in the diagram—coherent oscillations at 4-12 Hz between the sensorimotor cortex and the dystonic neck muscles. Which of the following best explains the pathophysiological mechanism underlying this EEG-EMG coherence pattern?
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