Transcortical Sensory Aphasia following Infarction in the Left Frontal Lobe

Maeshima, Shinichiro; Osawa, Aiko; Nakayama, Yasuichi; Miki, Junichiro

doi:10.1159/000080273

Cited by 11 publications

(4 citation statements)

References 20 publications

(36 reference statements)

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“…How can these apparently divergent findings be reconciled? In our opinion, the instances of negative evidence, wherein damage to the left AF coursing without repetition disturbance, as occurs in TAs (Bando et al, 1986;Berthier, 1999Berthier, , 2001Shuren et al, 1995;Selnes et al, 2002;Maeshima et al, 2004;Jefferies and Lambon Ralph, 2006;Kim et al, 2009), merit a reinterpretation. Recent DTI studies determine that the AF is structurally more complex than previously recognised as it is composed of different segments which by virtue of their corticalecortical connectivity participate in distinct language functions (Catani et al, 2005(Catani et al, , 2007Parker et al, 2005;Matsumoto et al, 2008;Vernooij et al, 2007;Saur et al, 2008;Friederici, 2009aFriederici, , 2009b.…”

Section: Variability Determines the Status Of Repetitionmentioning

confidence: 90%

“…Opponents to the participation of the AF in repetition processes have also build up their arguments on the basis of negative evidence (Shuren et al, 1995;Bernal and Ardila, 2009). Admittedly, lack of the expected effects of lesions exists and include cases in whom repetition performance remained intact after surgical ablation of the anterior left AF (Shuren et al, 1995) and cases of TAs coursing with wellpreserved ability to repeat heard speech in spite of having extensive involvement of the AF, the insular cortex, or both (Bando et al, 1986;Berthier et al, 1991;Berthier, 2001;Selnes et al, 2002;Maeshima et al, 2004;Jefferies and Lambon Ralph, 2006;Kim et al, 2009). Conversely, defenders of the role of the AF in repetition maintain that focal vascular (Poncet et al, 1987;Tanabe et al, 1987) and demyelinating lesions (Arnett et al, 1996) restricted to the left AF are sufficient to alter repetition causing CA.…”

Section: Variability Determines the Status Of Repetitionmentioning

confidence: 99%

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Arcuate fasciculus variability and repetition: The left sometimes can be right

Berthier

Ralph

Pujol

et al. 2012

Cortex

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Repetition ability is a major criterion for classifying aphasic syndromes and its status is helpful in the determination of the involved neural structures. It is widely assumed that repetition deficits correlate with injury to the left perisylvian core including the arcuate fasciculus (AF). However, descriptions of normal repetition despite damage to the AF or impaired repetition without AF involvement cast doubts on its role in repetition. To explain these paradoxes, we analyse two different aphasic syndromes - in which repetition is selectively impaired (conduction aphasia) or spared (transcortical aphasias) - in light of recent neuroimaging findings. We suggest that the AF and other white matter bundles are the anatomical signatures of language repetition and that individual variability in their anatomy and lateralisation may explain negative cases.

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Section: Variability Determines the Status Of Repetitionmentioning

confidence: 90%

Section: Variability Determines the Status Of Repetitionmentioning

confidence: 99%

Arcuate fasciculus variability and repetition: The left sometimes can be right

Berthier

Ralph

Pujol

et al. 2012

Cortex

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“…Rarely, patients with left frontal lobe lesions presenting with TSA have been reported [2,3,4,5,6], but the underlying mechanisms remain unclear. We studied 2 patients with TSA due to left frontal lobe lesions using multimodal MRIs to clarify the mechanism.…”

Section: Introductionmentioning

confidence: 99%

Transcortical Sensory Aphasia after Left Frontal Lobe Infarction: Loss of Functional Connectivity

et al. 2017

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Background: The underlying mechanism of transcortical sensory aphasia (TSA) caused by lesions occurring in the left frontal lobe remains unclear. We attempted to investigate the mechanism with the use of functional MRI (fMRI). Methods: We studied 2 patients with TSA after a left frontal infarction identified by diffusion-weighted MRI. As control subjects, a patient with transcortical motor aphasia and a healthy normal adult were chosen. The Korean version of Western Aphasia Battery was performed initially and at 3 months post stroke. We performed fMRI using verb generation and sentence completion tasks. Resting-state fMRI (rs-fMRI) was also obtained for network-level analysis initially and at 3 months post stroke. Results: The results of diffusion- and perfusion-weighted MRI revealed no diffusion-perfusion mismatch. Initial fMRI in patients with TSA showed no reversed inter-/intrahemispheric activation patterns. rs-fMRI showed significantly decreased resting-state functional connectivity in the language network in patients with TSA compared with the control subjects. Follow-up rs-fMRI studies showed improvement in functional connectivity along with the recovery of patients' language function. Conclusion: Our data showed that the auditory comprehension deficits in patients with frontal lobe infarcts is attributed to difficulty accessing the posterior language area due to functional disconnection between language centers in the acute stage of stroke.

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“…However, surprisingly TSA is also reported in cases of frontal damage (e.g., Sethi, Burke, Torgovnick, & Arsura, 2007;Maeshima, Osawa, Nakayama, & Miki, 2004; for an extensive review of these cases, see . , departing from the cases reported in the literature and his own patients, concluded that ''syndrome of TSA associated with frontal lobe lesions is phenomenologically similar to the 'classical' variant, except for the presence in the former of some deficits in speech articulation, prosody, phonology, and skilled buccofacial movements indicative of frontal lobe involvement'' (p. 124).…”

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confidence: 99%

Aristotle's functional association psychology. The syntagmatic and the paradigmatic axes in the neurolinguistics of Roman Jakobson and Alexander Luria: An anatomical and functional quagmire

Buckingham

2010

Aphasiology

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Background: Different classifications of aphasic disorders have been proposed over the years. During recent decades new approaches to aphasia study have been developed, suggesting that current aphasia classifications can and should be reconsidered. Aims: The purpose of this paper is to attempt to integrate contemporary knowledge about brain organisation of language and to propose a new aphasia classification. Main Contribution: It is emphasised that there are two fundamental forms of aphasia, which are linked to impairments in the lexical/semantic and grammatical systems of language (Wernicke-type aphasia and Broca-type aphasia, respectively). Grammar correlates with the ability to represent actions (verbs) and depends on what is known as Broca's area and its related brain circuits, but it is also related to the ability to quickly carry out the sequencing of articulatory movements required for speaking (speech praxis). Lexical/semantic and grammatical systems not only depend on different brain circuitries, but also on different types of memory and learning (declarative and procedural). Other aphasic syndromes do not really impair language knowledge per se, but rather peripheral mechanisms required to produce language (conduction aphasia and aphasia of the supplementary motor area), or the executive control of the language (extra-Sylvian or transcortical motor aphasia). Conclusions: A new classification of aphasic syndromes is proposed: primary (or ''central'') aphasias (Wernicke's aphasia-three subtypes-and Broca aphasia); secondary (or ''peripheral'') aphasias (conduction aphasia and supplementary motor area aphasia); and dysexecutive aphasia (extra-Sylvian-transcortical-motor aphasia), are distinguished.Over 20 different aphasia classifications have been proposed since Broca's first report (Broca, 1863). Table 1 presents the main aphasia classification proposals presented in recent decades. However, two points should be emphasised: (1) some of these classifications have played a guiding role in clinical practice and language research; and (2) differences are frequently observed in the names used, not in the clinical characterisation of the aphasia syndromes.

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Transcortical Sensory Aphasia following Infarction in the Left Frontal Lobe

Cited by 11 publications

References 20 publications

Arcuate fasciculus variability and repetition: The left sometimes can be right

Arcuate fasciculus variability and repetition: The left sometimes can be right

Transcortical Sensory Aphasia after Left Frontal Lobe Infarction: Loss of Functional Connectivity

Aristotle's functional association psychology. The syntagmatic and the paradigmatic axes in the neurolinguistics of Roman Jakobson and Alexander Luria: An anatomical and functional quagmire

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