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Time-course of encoding processes underlying word production: insight from ERP studies with aphasic patients| old_uid | 14656 |
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| title | Time-course of encoding processes underlying word production: insight from ERP studies with aphasic patients |
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| start_date | 2014/11/20 |
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| schedule | 11h-12h30 |
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| online | no |
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| summary | S
ingle word production has been intensively investigated with
chronometric and
electrophysiological
approaches
, leading to
an estimate
of the
relative
time course of the
underlying
encoding
processes (Indefrey
, 2011). Some of these estimates have been
conclusively addressed in recent EEG/ERP studies. However,
the
interpretation of ERP
results in these st
udies is
often based on assumption
s
about which encoding processes are
affected by the
manipulated psycholinguistic
variables
(e.g. lexical frequency)
, which
may be
controversial. Here
we will
illustrate how the
investigation
of diverging ERP correlates i
n
aphasic
speakers
with specific underlying cognitive impairments
contributes to the study of
the dynamics of speech planning.
In group studies ERPs diverged
in picture naming
in
patients relative to controls
in
different time
-
windows according to the
underlying (lexical
-
semantic
,
lexical
-
phonological
; phonological
-
phonetic
) impairments
(Laganaro et al., 2009;
201
3
).
Converging results
also
appeared in a single
case
study,
where
ERPs could be
compared before and after stroke
in a patient presenting with
lexical
-
phonological impairment
(Laganaro et al. 2011) and in patterns of recovery from anomia (Laganaro, in prep). |
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| responsibles | Rigalleau, Croizet |
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