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The myoclonic triangle is an important feedback circuit of the brainstem and deep cerebellar nuclei which is responsible for modulating spinal cord motor activity.
The circuit is thus composed:
Of note, this circuit contains a double decussation, implying that a lesion in this tract will cause ipsilateral symptoms.
The descending rubrospinal tract and reticulospinal tract originate in the red nucleus and reticular formation respectively, thereby providing the mechanism by which this circuit exerts its effects on spinal cord motor activity.
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