It is a major move from the claim that the core linguistic problem in Broca
's aphasia is the inability to deal with traces, to the claim that this is
the syntactic operation only and that it is exclusively supported by Broca'
s region. Three arguments plead against this move. First. many Broca patien
ts have no damage to Broca's area. Second, it is not only passive, but also
active jabberwocky sentences that activate the frontal operculum in a judg
ment task. Third, the same area is involved in a phrase-building production
task that does not require tense processing.