Diagrams depicting the anteroposterior extent of the chicken MVN in relation to other nuclei, cranial nerves, and the crossed cochlear bundle (CCB). MVN is subdivided into five sequential levels from posterior (1) to anterior (5): (1) posterior tip of MVN, (2) level at which the CCB first appears, (3) MVN mid-point at the level of tangential nucleus (TN), (4) level at which the CCB disappears, and (5) anterior tip of MVN. MVN, medial vestibular nucleus; MVNVL, ventrolateral part of MVN; NM, nucleus magnocellularis; NL, nucleus laminaris; AB, abducens nucleus; 8vest, vestibular nerve.