Generation of a long process of a CNS neuron, that carries efferent (outgoing) action potentials from the cell body in one half of the cerebral cortex towards target cells in the contralateral half. This axonal process is a member of those that make up the anterior commissure, a small midline fiber tract that lies at the anterior end of the corpus callosum. [ http://purl.obolibrary.org/obo/go/references/0000021 GOC:cls GOC:dgh GOC:dph http://openisbn.com/search.php?q=0878937420&isbn=1/ GOC:jid ]