alexia
loss of reading proficiency or impaired reading proficiency due to recent brain damage
2 models to alexia
dual route models
connectionist models
dual route models
lexical vs nonlexical reading routes
connectionist models
connections between orthography, meaning, and phonology units
peripheral alexias
affect early stages of reading process and involve difficulty perceiving the written word
central alexias
affect later stages of reading process and involve impairments in lexical and sublexical processing
Peripheral Alexia Subtypes
pure, neglect, attentional, visual
pure alexia
impairment in the simultaneous, parallel identification and processing pf letters in written word
letter by letter reading
what happens in pure alexia?
disconnection between visual info from LH word-recognition system
neglect alexia
impairment in correctly identifying initial or final letters in words
influenced by nature of letter string
attentional alexia
Incorrect productions of letters in a word as the result of interference from other letters in the word.
visual alexia
production of a word that is visually similar to target word
Central Alexia Subtypes
surface, deep, phonological
surface alexia
impaired reading of irregularly spelled words with relatively intact reading of regularly spelled real words and pseudowords
deep alexia
impaired pseudoword reading in conjunction with the production of semantic and visual errors in oral reading
phonological alexia
impaired pseudoword reading in conjunction with the absence of semantic reading errors
lesion site of peripheral alexias
areas of the brain associated with visual processing
lesion site of surface alexia
left temporal or temporoparietal lesions
lesion site of deep alexia
extensive left hemisphere lesions
lesion site of phonological alexia
left perisylvian or left superior temporal lesions
which type of alexia is associated with aphasia?
central alexia
alexia associated with fluent aphasia
surface
alexia associated with nonfluent aphasia
deep
treatment of alexia
reading at single-word level
training of phonological aspects of reading
increasing reading fluency through
multiple oral reading
oral reading for language in aphasia
strategies for summarizing information
attentive reading and constrained summarization
read aloud, silent reading, oral summary
strategies for identifying key words and main ideas
proposition identification and constrained summarization
identify key words before summarizing