A Case of Dysgraphia after Cerebellar Infarction Where Functional NIRS Guided the Task Aimed at Activating the Hypoperfused Region

Background. Linguistic impairment following cerebellar lesions is characterized by a marked cerebellocerebral diaschisis with decreased perfusion in the left cerebral hemisphere. Case. We report on a 60-year-old right-handed French chef who presented with linguistic deficits following a right cerebe...

Full description

Saved in:
Bibliographic Details
Published in:Case reports in neurological medicine 2021-06, Vol.2021, p.6612541-9
Main Authors: Fujii, Mutsumi, Tanigo, Kazumi, Yamamoto, Hirokazu, Kikugawa, Keijyu, Shirakawa, Masayuki, Ohgushi, Miki, Chin, Takaaki
Format: Article
Language:English
Subjects:
Aphasia
Ataxia
Brain damage
Case Report
Case reports
Infrared spectroscopy
Language
Learning disabilities
Magnetic resonance imaging
Medical imaging
Phonology
Reading comprehension
Semantics
Stroke
Writing
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Background. Linguistic impairment following cerebellar lesions is characterized by a marked cerebellocerebral diaschisis with decreased perfusion in the left cerebral hemisphere. Case. We report on a 60-year-old right-handed French chef who presented with linguistic deficits following a right cerebellar infarction. Neurolinguistic examinations in the acute phase showed impaired graphomotor planning, especially for kanji (Japanese morphograms). Despite the absence of any structural damage to the supratentorial brain regions, a quantitative 123I-IMP SPECT study revealed a relative hypoperfusion, mainly around the left posterior middle temporal gyrus, considered to be a crossed cerebellar-cerebral diaschisis. We performed functional near-infrared spectroscopy (fNIRS) and observed that a picture card task could increase blood perfusion in the affected area. This task was as follows: once he saw a picture card depicting a dish, the patient had to list the ingredients that make up the dish. For example, he had to name vegetables, meat, and spices upon seeing a “curry” picture card. We added this task to his daily speech-hearing therapy regimen. In the chronic phase, we confirmed symptom amelioration in linguistic performance-paralleled reduction in the level of hypoperfusion on SPECT study. Discussion. This case is the first report of an fNIRS approach used to evaluate evidence-based prospective speech-hearing tasks by observing blood flow to the hypoperfused area of the cerebral cortex surface.
ISSN:2090-6668
2090-6676
DOI:10.1155/2021/6612541