Parallel fiber 1209253 201502322 2008-03-28T04:12:43Z Arcadian 104523 nav {{Infobox Anatomy | Name = {{PAGENAME}} | Latin = | GraySubject = | GrayPage = | Image = CerebCircuit.png | Caption = Microcircuitry of the cerebellum. [[Excitatory synapses]] are denoted by (+) and [[inhibitory synapses]] by (-).<BR>MF: [[Mossy fiber]].<BR>DCN: [[Deep cerebellar nuclei]].<BR>IO: [[Inferior olivary nucleus|Inferior olive]].<BR>CF: [[Climbing fiber]].<BR>GC: [[Granule cell]].<BR>PF: [[Parallel fiber]].<BR>PC: [[Purkinje cell]].<BR>GgC: [[Golgi cell]].<BR>SC: [[Stellate cell]].<BR>BC: [[Basket cell]]. | Image2 = | Caption2 = | System = | MeshName = | MeshNumber = | DorlandsPre = f_05 | DorlandsSuf = 12361338 | }} '''Parallel fibers''' arise from [[granule cell]]s in the [[Cerebellum|cerebellar cortex]]. They form [[synapse]]s onto the [[dendrite]]s of [[Purkinje cell]]s (the output [[neuron]]s of the [[cerebellum]]). Granule cells are very small and very numerous. They are thought to make up as many as 90% of the neurons in the brain. [[Category:Neuroanatomy]] [[Category:Cerebellum]] {{Neuroscience-stub}} {{Cerebellum}}