brachium colliculi brachium colliculi brachium colliculi may refer to: inferior colliculus (brachium colliculi inferioris), the principal midbrain nucleus of the auditory pathway superior colliculus (brachium colliculi superioris), a paired structure that forms a major component of the vertebrate midbrain this article is issued from wikipedia. the text is licensed under creative commons - attribution - sharealike. additional terms may apply for the media files.