<prompt> All of the following structures are involved in Weber syndrome EXCEPTOculomotor nerve rootsCoicobulbar tractsCerebellar pedunclesCoicospinal tract  <response>: Weber syndrome is a lesion of the anterior midbrain at the level of superior colliculus involves: Oculomotor nerve Ipsilateral downward laterally deted eye Substantia nigra Contralateral parkinsonism Coicobulbar fibers Coicospinal tract 