Auditory repetition priming is impaired in pure alexic patients
| Autor: | Kimberly M. Miller, Diane Swick, Jary Larsen |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Male
Linguistics and Language medicine.medical_specialty Cognitive Neuroscience Repetition priming Experimental and Cognitive Psychology Neuropsychological Tests Audiology Language and Linguistics Infarction Posterior Cerebral Artery Speech and Hearing Memory Reaction Time Lexical decision task medicine Humans Aged Aged 80 and over Temporal cortex Response priming Analysis of Variance Alexia Pure Middle Aged medicine.disease Magnetic Resonance Imaging Pure alexia Temporal Lobe Agraphia Auditory Perception Female Occipital Lobe Implicit memory medicine.symptom Psychology Priming (psychology) Cognitive psychology |
| Zdroj: | Brain and Language. 89:543-553 |
| ISSN: | 0093-934X |
| DOI: | 10.1016/j.bandl.2004.01.005 |
| Popis: | Alexia without agraphia, or “pure” alexia, is an acquired impairment in reading that leaves writing skills intact. Repetition priming for visually presented words is diminished in pure alexia. However, it is not possible to verify whether this priming deficit is modality-specific or modality independent because reading abilities are compromised. Hence, auditory repetition priming was assessed with lexical decision and word stem completion tasks in pure alexic patients with lesions in left inferior temporal–occipital cortex and the splenium. Perceptually based, modality-specific priming models predict intact auditory priming, since auditory association cortex is spared in the patients. Alternatively, modality-independent models, which suggest that priming reflects the temporary modification of an amodal system, might predict impairments. Baseline performance was matched in the patients and controls, although lexical decision priming measures showed an interaction between group and repetition lag. The patients showed intact immediate priming but significantly less priming than controls at longer delays. Furthermore, word stem completion priming was abolished in the patients. One explanation for the deficit is that left inferior temporal–occipital cortex supports amodal aspects of priming, as suggested by recent neuroimaging results. Another possibility is that long-term auditory priming relies on covert orthographic representations which were unavailable in the patients. The results provide support for interactive models of word identification. |
| Databáze: | OpenAIRE |
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