A case of isolated dystextia due to subcortical infarction: a novel condition of digital device era.

BACKGROUND: In recent years, cases of dystextia (texting disabilities) and dystypia (typing disabilities) have been reported. However, reports describing isolated dystextia without aphasia or other cognitive impairments are rare, and the detailed pathophysiology is not fully understood. Most Japanese people use the alphabetical spelling system (Romaji) for texting and typing. Herein, we report the case of a man with isolated dystextia and dystypia resulting from Romaji conversion difficulties. CASE PRESENTATION: A 48-year-old, right-handed Japanese man developed texting and typing difficulties. The standard neuropsychological tests showed no signs of aphasia or other cognitive impairments, except for slight executive dysfunction. Thus, isolated dystextia and dystypia were diagnosed. Furthermore, the patient experienced Romaji conversion difficulties. Magnetic resonance imaging revealed a subcortical infarction in the left cerebral hemisphere. Single photon emission tomography revealed hypoperfusion, including in the left dorsolateral frontal cortex. CONCLUSIONS: The left dorsolateral frontal cortex may be related to Romaji conversion in Japanese individuals. Therefore, diaschisis of the left dorsolateral frontal cortex due to subcortical lesions may have impaired Romaji conversion, leading to dystextia and dystypia, in this patient.

Dystextia and dystypia due to phonological errors after ischemic stroke: a case report in a Japanese patient.

A 69-year-old Japanese male presented with acute dystextia and dystypia, defined as texting and typing impairments, respectively. His text input speed decreased due to a phonologically incorrect kana flick input on his smartphone. Additionally, dystypia occurred due to phonemic paragraphia of Romaji. Brain MRI revealed a new left lenticulostriate infarction sparing the cerebral cortex. SPECT showed reduced cerebral blood flow in the left inferior precentral frontal gyrus as well as in the infarction area. It was concluded that his abnormal phonological processes resulted from hypoperfusion in the left inferior precentral gyrus that is assumed to be an endpoint of the arcuate fasciculus.

The use of WhatsApp Messenger: an important tool in modern neurological examination.

WhatsApp Messenger is one of the most popular and still growing mobile applications worldwide in telemedicine. WhatsApp Messenger can be used as a communication tool and an adjunctive tool within telemedicine, but it is the ability or inability to use WhatsApp Messenger correctly that provides a powerful clinical neurological function tool. The easy use and the application's popularity make it extremely useful in obtaining clues in patients' neurological history. Dystextia or dystypia, the inability to send correct text messages, can be used as an indicator of neurological deficits, and is an upcoming term in neurological vascular pathology. In this case series, we present three cases in which the inability to send text messages were the clue for neurological pathology. This easy and useful evaluation of the ability to use a text message program should be incorporated in standard neurological history taking and examination, as it can provide clues for underlying neurological pathology.

Dystextia and dystypia as modern stroke symptoms: A case series and literature review.

Stroke recognition remains a barrier to care in cerebrovascular disease. Despite an increasing reliance on digital communication, the clinical utility of deficits relating to technology remains unexplored. Dystextia and dystypia, terms used to refer to impairments in texting and typing, respectively, may serve as modern indicators of stroke and provide information regarding stroke duration, symptomatology, and etiological diagnosis. In this report, we describe two cases in which dystextia and dystypia were involved in stroke presentation and perform a literature review surrounding these signs. Four out of six cases identified on literature review in which stroke etiology was described, in addition to both of our presented cases, were found to be embolic in origin. While shared lesion topography involving the left posterior upper insular cortex and superior longitudinal fasciculus was identified in our cases, additional research is required for proper symptom-lesion mapping. Further characterization of dystextia and dystypia, and their corresponding localization, may assist in stroke diagnosis and guide investigations.