Compare and contrast two different forms of aphasia. What part of the brain is specifically affected by each form and how would this affect the mental lexicon?
Answer
The two different forms of aphasia are :
1. Expressive aphasia is also known as broca
aphasia. It includes loss of language production. The person cannot
relate to connect the words. Major content words can be observed
but the sentence lacks the grammaticle corrections. The speech of
indivual hault and more effort is needed to produce the speech.
Thus it is a types of non-fluent aphasia.
The anterior region of frontal lobe (Broca's area) in left
hemisphere is affected in expressive aphasia.
2. Receptive aphasia is also known as
Wrenicke's aphasia. It ncludes the inabilty of language
comprehension. It contrast to the expressive aphasia as a person
can give fluent speech with correct grammer use. But, there is
difficulty in understanding the language. The speech produced lacks
the meaning.
The left posterior temporal region (Wrenicke's area) of
brain in left hemisphere is affected in receptive
aphasia.
Mental lexicon is the collection of information
related to word, their meanings, and pronounciation of words.
In aphasia, the damage to the major areas of speech and information
processing are damaged. This results in imapired cognition and
memory. In receptive
aphasia, the mental lexicon can be affected by inability of
the brain to remember a word, object and lacking in organization of
the lexion.
In expressive
aphasia, the deificit of verb production affects mental
lexion. Individial lacks the information that connects a
sentence.
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