Types of acquired dyslexia in Spanish-speaking patients with aphasia.

The different types of acquired dyslexia described by cognitive neuropsychology have been observed in single-case and case series studies in different languages. However, no multipatient study of Spanish-speaking individuals has been reported that uses the same criteria and tasks to identify each participant's acquired dyslexia pattern. In this study, we analyzed participants' performance in three tasks (oral reading of words and nonwords, visual lexical decision with pseudohomophones, and written homophone comprehension) among 16 Spanish-speaking patients with aphasia. We identified 9 patients with acquired phonological dyslexia, 3 with acquired surface dyslexia, and 4 with acquired mixed dyslexia. The results of this research provide more information about the relative frequency of each type of acquired dyslexia in Spanish, which could be used to help design more appropriate treatments for rehabilitation. Identifying which processes have been impaired and which have been preserved will allow professionals to plan more specific interventions.

Disociaciones entre prosodia emocional y lingüística en pacientes con lesiones cerebrales del hemisferio derecho / Dissociations between emotional and linguistic prosody in patients with right hemisphere lesions

El objetivo de este trabajo fue evaluar patrones de disociación entre el procesamiento de prosodia lingüística y emocional con el fin de analizar la independencia funcional entre ambos. Se realizó un estudio con un diseño de múltiples casos únicos de 17 pacientes con lesiones del hemisferio derecho debidas a accidente cerebro vascular. Se analizaron los perfiles de alteración/ conservación de la capacidad para procesar ambos tipos de prosodia con cuatro pruebas de comprensión y repetición de prosodia emocional y lingüística, y se comparó el rendimiento de cada paciente con un grupo control sano. Los resultados mostraron rendimiento disociado entre prosodia emocional y lingüística en la habilidad de comprensión prosódica en 3/17 pacientes y no se hallaron disociaciones dobles. El hallazgo de distintos patrones de alteración/conservación entre prosodia lingüística y emocional, tanto en la habilidad para comprender como para repetir prosodia, es evidencia que apoya el supuesto de independencia funcional entre los procesamientos de ambos tipos de prosodia.

The goal of this study was to evaluate dissociation patterns between processing of linguistic prosody and emotional (or affective) prosody, in order to analyze the functional independence between them. We carried out a multiple single-cases study of 17 patients with right hemisphere lesions due to stroke. The alteration / conservation profiles of the ability to process both types of prosody were analyzed with four tasks of comprehension and repetition of emotional and linguistic prosody. The performance of each patient was compared with a healthy control group. The results showed a dissociated performance between emotional and linguistic prosody in prosodic comprehension in 3/17 patients, and no double dissociations were found. Finding different patterns of alteration / conservation between linguistic and emotional prosody, both in the ability to understand and to repeat prosody, supports the assumption of functional independence between processing of both types of prosody.