Download Alexia: Diagnosis, Treatment and Theory by Alexander Leff, Randi Starrfelt (auth.) PDF

By Alexander Leff, Randi Starrfelt (auth.)

This publication is a entire overview of the most got issues of interpreting: hemianopic, natural and vital alexia. The authors assessment the diagnostic standards for every of the differing kinds of affliction, and the efficacy of the healing reports that experience tried to remediate them. the several theoretical types of grownup examining, which principally leisure on how the examining procedure responds to damage, also are mentioned and evaluated. Focal mind damage as a result of stroke and mind tumors are mentioned intensive as are the results of dementia on reading.

This e-book starts off with a bankruptcy on common interpreting, by means of chapters on hemianopic alexia, natural alexia and important alexia, every one based within the comparable approach, with: an outline of the ; a historic assessment of circumstances thus far; psychophysics; attention of the causative lesions; proof from sensible imaging experiences on sufferers and, most significantly, a evaluation of the proof base for treating each one situation. eventually, there's a bankruptcy on how sufferer information has knowledgeable how we expect approximately reading.

Alexia: prognosis, therapy and Theory is geared toward neuropsychologists (both experimental and clinical), neurologists, speech therapists and others who care for sufferers whose analyzing has been stricken by an received mind harm, in addition to scholars learning language disorders.

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Additional info for Alexia: Diagnosis, Treatment and Theory

Example text

A) 30° visual fields (HFA) from the patient’s left (LE) and (RE) right eyes. Note the normal blind spots ~15° to the left and right of fixation (crosshair) and the small, homonymous scotoma affecting the right, parafoveal inferior quadrant. The rest of the visual field was normal, and this patient would be able to drive. The defect specifically affected text reading. MRI brain imaging demonstrated stroke damage to the left (Lt) occipital lobe, specifically primary visual cortex. In the sequential, axial FLAIR images (b and c), the stroke appears as a bright (white) signal at the tip of the occipital pole in the axial FLAIR image at the level of the upper pons (b) and midbrain (c).

Exception word reading (irregular words, read via the direct or lexical route) correlated with greater (more normal) grey matter values in the anterior and lateral temporal lobe, while nonword reading performance (read via the indirect or sublexical route) correlated with greater (more normal) grey matter values in the inferior parietal regions (Fig. 6). Independent effect of exception word reading Exception Word Pseudo-Word Age Sex a b Exception Word Pseudo-Word Age Sex Independent effect of pseudo-word reading Fig.

Not drawn to scale (Reproduced with permission from [31]) Both patient groups are slow to read text but even in this early poststroke phase, the right-sided group is significantly worse. In Zihl’s study, controls read at 120 wpm which was surprisingly slow; patients with left-sided hemianopias read at 55 46 2 Hemianopic Alexia wpm and those with right-sided hemianopias at 28 wpm. Even with subjects limited by articulation (they read aloud), these times are really rather slow for patients with hemianopic alexia and little in the way of concomitant “pure” alexia (Zihl excluded patients with aphasia or alexia but did not provide details on how this was assessed), but this also may be a reflection of the recency of their stroke.

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