April 22nd, 2013

shooting stars

Definition problems...

I am currently looking into different kinds of language disorders - both acquired and developmental.
Now, I understand that there are aphasias, which affect all language modalities - writing, speaking, comprehension and reading.
But how are developmental dyslexias related to acquired dyslexias on the one hand and aphasias ont he other? Do all the occurring subtypes of dyslexia, like surface dyslexia or deep dyslexia, appear in both acquired and developmental form?

The sources I have here keep contradicting themselves - some claim the symptoms and shape dyslexias take are the same whether acquired or developed, others claim there is no such thing as an acquired dyslexia, and that reading/writing problems only occur within the "frame" of an aphasia.

Any help or pointers to reliable sources would be very much appreciated!