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Professional or Amateur? The Phonological Output Buffer as a Working Memory Operator

The Phonological Output Buffer (POB) is thought to be the stage in language production where phonemes are held in working memory and assembled into words. The neural implementation of the POB remains unclear despite a wealth of phenomenological data. Individuals with POB impairment make phonological...

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Autores principales: Haluts, Neta, Trippa, Massimiliano, Friedmann, Naama, Treves, Alessandro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517200/
https://www.ncbi.nlm.nih.gov/pubmed/33286434
http://dx.doi.org/10.3390/e22060662
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author Haluts, Neta
Trippa, Massimiliano
Friedmann, Naama
Treves, Alessandro
author_facet Haluts, Neta
Trippa, Massimiliano
Friedmann, Naama
Treves, Alessandro
author_sort Haluts, Neta
collection PubMed
description The Phonological Output Buffer (POB) is thought to be the stage in language production where phonemes are held in working memory and assembled into words. The neural implementation of the POB remains unclear despite a wealth of phenomenological data. Individuals with POB impairment make phonological errors when they produce words and non-words, including phoneme omissions, insertions, transpositions, substitutions and perseverations. Errors can apply to different kinds and sizes of units, such as phonemes, number words, morphological affixes, and function words, and evidence from POB impairments suggests that units tend to substituted with units of the same kind—e.g., numbers with numbers and whole morphological affixes with other affixes. This suggests that different units are processed and stored in the POB in the same stage, but perhaps separately in different mini-stores. Further, similar impairments can affect the buffer used to produce Sign Language, which raises the question of whether it is instantiated in a distinct device with the same design. However, what appear as separate buffers may be distinct regions in the activity space of a single extended POB network, connected with a lexicon network. The self-consistency of this idea can be assessed by studying an autoassociative Potts network, as a model of memory storage distributed over several cortical areas, and testing whether the network can represent both units of word and signs, reflecting the types and patterns of errors made by individuals with POB impairment.
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spelling pubmed-75172002020-11-09 Professional or Amateur? The Phonological Output Buffer as a Working Memory Operator Haluts, Neta Trippa, Massimiliano Friedmann, Naama Treves, Alessandro Entropy (Basel) Article The Phonological Output Buffer (POB) is thought to be the stage in language production where phonemes are held in working memory and assembled into words. The neural implementation of the POB remains unclear despite a wealth of phenomenological data. Individuals with POB impairment make phonological errors when they produce words and non-words, including phoneme omissions, insertions, transpositions, substitutions and perseverations. Errors can apply to different kinds and sizes of units, such as phonemes, number words, morphological affixes, and function words, and evidence from POB impairments suggests that units tend to substituted with units of the same kind—e.g., numbers with numbers and whole morphological affixes with other affixes. This suggests that different units are processed and stored in the POB in the same stage, but perhaps separately in different mini-stores. Further, similar impairments can affect the buffer used to produce Sign Language, which raises the question of whether it is instantiated in a distinct device with the same design. However, what appear as separate buffers may be distinct regions in the activity space of a single extended POB network, connected with a lexicon network. The self-consistency of this idea can be assessed by studying an autoassociative Potts network, as a model of memory storage distributed over several cortical areas, and testing whether the network can represent both units of word and signs, reflecting the types and patterns of errors made by individuals with POB impairment. MDPI 2020-06-15 /pmc/articles/PMC7517200/ /pubmed/33286434 http://dx.doi.org/10.3390/e22060662 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Haluts, Neta
Trippa, Massimiliano
Friedmann, Naama
Treves, Alessandro
Professional or Amateur? The Phonological Output Buffer as a Working Memory Operator
title Professional or Amateur? The Phonological Output Buffer as a Working Memory Operator
title_full Professional or Amateur? The Phonological Output Buffer as a Working Memory Operator
title_fullStr Professional or Amateur? The Phonological Output Buffer as a Working Memory Operator
title_full_unstemmed Professional or Amateur? The Phonological Output Buffer as a Working Memory Operator
title_short Professional or Amateur? The Phonological Output Buffer as a Working Memory Operator
title_sort professional or amateur? the phonological output buffer as a working memory operator
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517200/
https://www.ncbi.nlm.nih.gov/pubmed/33286434
http://dx.doi.org/10.3390/e22060662
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