Closely spaced nodes of Ranvier in the teleost brain.
D000818:Animals; D005399:Fishes / Q000033:anatomy & histology*; D008636:Mesencephalon / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D009186:Myelin Sheath / Q000166:cytology*; D009802:Oculomotor Nerve / Q000166:cytology*; D011901:Ranvier's Nodes / Q000166:cytology