brachium, pl.brachia

(bra'ke-um) [L. from G. brach i on, arm.] i. The arm, specifically the segment of the upper extremity between the shoulder and-the elbow, An anatomical structure resembling an arm. b. cerebell'i, b. conjunct i vum. _b. cer'- ebri, b. Tum ante'rius, b. quadrigeminum super i us. b. conjunct i'vum cerebelli [BNA], "connecting arm" of the cerebellum, superior cerebellar peduncle, band of white fibers emerging from each cerebellar a, hemisphere and pa ing upward over the pons, the two converging to form first the sides and then a part of the roof of the fourth ventricle, and finally dipping beneath the quadrigeminal bodies to enter the mesencephalon, b.