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[Neglect dyslexia owing to traumatic fronto-temporal right hemisphere bleeding]
1Universität Oldenburg, Klinische und Gesundheitspsychologie. helmut.hildebrandt@uni-oldenburg.de
Fortschritte Der Neurologie-Psychiatrie
|January 17, 2003
Summary
This study identifies distinct reference systems in neglect, revealing a patient with both egocentric and stimulus-centered disorders impacting object perception after brain trauma. These findings highlight independent disturbances affecting patient behavior.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurology
Background:
- Neglect is traditionally understood as a unilateral disturbance of the egocentric reference system.
- However, disturbances can also involve stimulus-centered or object-centered reference systems, where object position is less critical.
Observation:
- A patient with head-brain trauma and fronto-temporal bleeding exhibited traditional neglect.
- Additionally, the patient displayed a stimulus-centered, left-sided disorder affecting word and object perception.
Findings:
- The observed disorder was independent of the object's position in space.
- It affected both word and object perception.
- The disorder was particularly sensitive to alterations in the initial letters of words.
Implications:
- This case suggests at least three distinct reference systems for object representation in neglect: egocentric, stimulus-centered, and object-centered.
- These systems can be independently disturbed.
- Such independent disturbances can significantly impair a patient's behavioral capabilities.