part of start stage end stage corpus cerebelli valvula cerebelli portion of tissue mossy fiber Portion of tissue that consists of afferent axons from the spinal cord, sensory medullary nuclei, reticular nuclei and dorsal tegmental nuclei into the corpus cerebelli and valvula cerebelli, where they synapse within the granule cell layer. TAO:0002210 2009-08-13T03:02:35Z zebrafish_anatomy Melissa Haendel mossy fibers ZFA:0001710 unknown adult