Dysfunction of the left angular gyrus may be associated with writing errors in ALS.

Area of Science:

• Neuroscience
• Neurology
• Cognitive Science

Background:

• Language dysfunction is a key cognitive impairment in amyotrophic lateral sclerosis (ALS).
• This impairment can significantly affect patient communication abilities.
• Understanding these deficits is crucial for managing ALS progression.

Purpose of the Study:

• To investigate language dysfunction in ALS patients.
• To explore the relationship between language deficits and other neuropsychological tests.
• To identify specific brain regions associated with language dysfunction using perfusion imaging.

Main Methods:

• 37 patients with ALS underwent neuropsychological assessments including the Western Aphasia Battery (WAB).
• Regional cerebral blood flow was measured using N-isopropyl-p-[123I] iodoamphetamine single-photon emission computed tomography.
• Multiple regression analyses examined the relationship between cerebral blood flow and WAB scores, controlling for demographic factors.

Main Results:

• Significant rates of language abnormalities were observed, particularly in writing (51.4%) and auditory verbal comprehension (25.7%).
• Executive function tests correlated with naming and reading scores.
• Writing errors were primarily associated with the left angular gyrus, showing a positive perfusion relationship.

Conclusions:

• The left angular gyrus is identified as the brain region associated with writing errors in ALS patients.
• Language dysfunction, especially writing deficits, is a notable feature of cognitive impairment in ALS.
• Further research can explore targeted interventions for communication support in ALS.