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Finally, the frontal lobe comes into play for spontaneous, expressive narration, just as it
was necessary to comprehend continuous, complex narrative speech.
As I stated above, narrative expressive speech or expression begins with an intention
or plan which subsequently must be recoded into a verbal form and moulded into a
speech expression. It is clear... that both these processes call for the participation of the
frontal lobes, an apparatus essential for the creation of active intentions or the
forming of plans. If this motive of the expression is absent, and no plan is actively
formed, naturally there can be no question of spontaneous active speech, although
repetitive speech and naming of objects remain intact.77
Does this neuropsychological analysis help us understand both the cause and the cure for
some of the speech performance problems we have faced in the past? While many echoic
mimicry memory drills may activate certain brain functions, they do not usually involve
the abstract frontal lobe function. As a consequence, many drills sound just like
conversations with patients with a marked frontal syndrome.
Whereas their responses to questions permitting a simple echolalic response ("Were
you drinking tea?"--"Yes, I was drinking tea") cause little difficulty, questions
requiring the introduction of new connections into the answer ("Where have you
been today?") give rise to considerable difficulty.78
What may well be necessary is extensive listening drills designed to create an abstracted
schema in the frontal lobes as well as in the parieto-occipital cortex zone. Active and
attentive listening overa period of time and to a variety of speech patterns can be
considered an abstract modelling process.
In abstract modelling, observers extract the common attributes exemplified in diverse
modeled responses and formulate rules for generating behavior with similar
structural characteristics... General features can be extracted through repeated exposure
to individual exemplars which share common properties. 79
If we eventually expect language students to spontaneously express their thoughts, then we
must help them build up their abstract model of the world and of the language.
To take an example, a model generates from a set of noun sentences containing the
passive construction ("The dog is being petted" "The window was opened", etc.). The
sentence examplars vary in content and other features, but their structural property--
the passive voice--is the same. Children later are instructed to create sentences from a
different set of nouns with the model absent, and their production of passive
construction is recorded.80
If we do not do this through extensive listening, we may be left with students of limited
language facility similar to those who are physiologically impaired.
The transition from the general plan to narration requires the recoding of the plan
into speech, and an important place in this process is played by internal speech with its
predicative structure ...providing what is known in syntax as the "linear scheme of the
sentence"... It is this formation of the "linear scheme of the sentence" which is
substantially (sometimes completely) disturbed in patients with lesions of the inferior
postfrontal zones of the left hemisphere. Asa rule these patients have no difficulty
whatever in repeating words or in naming objects. They can also repeat relatively
simple sentences. However, as soon as they are required to express a thought, or even
to produce an elementary verbal expression, they are completely unable to do so. 81
This does not imply that there are not some other brain functions necessary for speech
performance, or that listening alone can automatically create both a language competence
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