Pulvermüller's Hebbian model implies that
an impairment in the word form system will affect phonological
articulation and phonological comprehension, because there
is only a single representation. Clinical evidence from patients with
word-form deafness demonstrates a dissociation between input and
output phonologies. These data suggest that auditory comprehension
and articulatory production depend on discrete phonological
representations localized in different cortical networks.
