internal arcuate fibers
Definition: fibers that arise in the cuneate and gracile nuclei, pass in a curving course across the midline of the medulla oblongata, and form the contralateral medial lemniscus; may also designate other fibers such as those of the olivocerebellar tract that arch through the substance of the medulla and may traverse the sensory decussation.
Synonym(s): fibrae arcuatae internaeTA
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