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cerebrobascular accident
a "stroke"; brain damage caused by occlusion or rupture of a blood vessel in the brain
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aphasia
difficulty in producing or comprehending speech not prduced by deafness or a simple motor deficit; caused by brain damage
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Broca's aphasia
a form of aphasia characterized by agrammatism, anomia, and extreme difficulty in speech articulation
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function word
a preposition, article, or other word that conveys little of the meaning of a sentence but is important in specifying its grammatical structure
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content word
a noun, verb, adjective, or adverb that conveys meaning
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Broca's area
a region of frontal cortex, located just rostral to the base of the left primary motor cortex, that is necessary for normal speech production
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agrammatism
one of the usual symptom sof Broca's aphasia; a difficulty in comprehending or proprely employing grammatical devices, such as verb endings and word order
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anomia
difficulty in finding (remembering) the appropriate word to describe an object, action, or attribute; one of the symptoms of aphasia
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apraxia of speech
impairment in the ability to program movements of the tongue, lips, and throat required to produce the proper sequence of speech sounds
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Wernicke's area
a region of auditory association cortex on the left temporal love of humans, which is important in the comprehension of words and the production of meaningful speech
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Wernicke's aphasia
a form of aphasia characterized by poor speech comprehension and fluent but meaningless speech
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pure word deafness
the ability to hear, to speak, and (usually) to read and write without being able to comprehend the meaning of speech; caused by damage to Wernicke's area or disruption of auditory input to this region
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transcortical sensory aphasia
a speech disorder in which a person has difficulty comprehending speech and producing meaningful spontaneous speech but can repeat speech; caused by damage to the region of the brain posterior to Wernicke's area
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autotopagnosia
inability to name body parts or to identify body parts that another person names
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arcuate fasciculus
a bundle of axons that connects Wernicke's area with Broca's area; damage causes conduction aphasia
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conduction aphasia
an aphasia characterized by inability to repeat words that are heard but the ability to speak normally an dcomprehend the speech of others
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circumlocution
a strategy by which people with anomia find alternative ways to say something when they are unable to think of the most appropirate word
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prosody
the use of changes in intonation and emphasis to convey meaning in speech besides that specified by the particular words; an imporant means of communication of emotion
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pure alexia
loss of the ability to read without loss of the ability to write; produced by brain damage
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whole-word reading
reading by recognizing a word as a whole; "sight reading"
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phonetic reading
reading by decoding the phonetic significance of letter strings; "sound reading"
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surface dyslexia
a reading disorder in which a person can read words phonetically but has difficulty reading irregularly spelled words by the whole-word method
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phonological dyslexia
a reading disorder in which a person can read familiar words but has difficulty reading unfamiliar words or pronounceable nonwords
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word-form dyslexia
a disorder in which a person can read a word only after spelling out the individual letters
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spelling dyslexia
an alternative name for word-form dyslexia
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direct dyslexia
a language disorder caused by brain damage in which the person can read words aloud without understanding them
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phonological dysgraphia
a writing disorder in which the person cannot sound out words and write them phonetically
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orthographic dysgraphia
a writing disorder in which the person can spell regularly spelled words but not irregularly spelled ones
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developmental dyslexia
a reading difficulty in a person of normal intelligence and percetual ability; of genetic origin or caused by prenatal or perinatal factors
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