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Hear words or read them first ..
Auditory and vision .. Then words go into mental lexicon ..
Corresponding word(closest fit is found): then semantics are evaluated
by concept in the sentence. (Concept is u have to extract the language
and identify the words)(then words have to be understood in grammatical
sense in context of the sentence)
What's going on in the brain when understanding spoken language
Brain areas shown by fmri : left
hemisphere laterized - language- primary auditory cortex is in tempral
lobs (heschyls gyrus) - info spreads out to superior temporal gyrus and
superior temporal sulcus (secondary auditory cortex) ---- these all
process sound , other areas of the brain like prefrontal cortex process
language semantics phonemes (basic components of sound )more so than
Do we see differences in n400(semantic)/n600 (syntax) response deficits in different people :
People patients who have language
and comprehension deficits ( low aphasias) you get abnormal responses :
brain appears to recognize the word but timing is off. (Extreme and
dull?) processing is not in sync
Starts with idea/concept then
goes to lexicon to identify correctly select words to express.
LEMMA(form of word to use before you say it run/ran) -- then have to
code the word phonologically in order to speak and articulate - self
monitoring system is like auto correct for speech : sometimes after
before or during what u say
They can alter the size of the
peak by altering the properties of a word. Size of word doesn't matter
but property's do. Lexical selection , word identify. Eg work vs worked =
changes in 2nd stage
Last stage is phonological encoding = how to say words using syllables
Paul Brocca - the case of the
lebornge 1861 - experiment showed damage was to inferior frontal lobe in
left hemisphere : broccas area = we speak with our left hemisphere =
yes specific functions do work in specific areas of brain
Non fluent or telegraphic speech
(most common ones) --- dysarthria : difficulty controlling muscles
involved in articulation --- comprehension is normal except for grammar
(agrammertism: failure to comprehend meaning from grammar)
- primary deficit is they can't comprehend the meaning of what is being
said to them - incorrect word use - they cannot understand Semantic
concepts and they don't know what they are saying (self monitor system)