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Updated: May 5, 2026

Uncovering Beat Deafness: Detecting Rhythm Disorders with Synchronized Finger Tapping and Perceptual Timing Tasks
Published on: March 16, 2015
A case of amusia with beat deafness and apraxia of speech
Masayuki Satoh1, Ken-Ichi Tabei2, Makiko Abe3
1Center for Comprehensive Care and Research on Memory Disorders, National Center for Geriatrics and Gerontology Obu, Aichi Prefecture ,Japan.
Abstract:
After experiencing two ischemic brain attacks, a 40-year-old, right-handed, female amateur cello player developed apraxia of speech (AOS) and amusia, especially on the aspect of the beat. Her tempo became gradually faster, but while playing, she could not recognize that. When she listened to her own recorded performances, she could identify the differences immediately and precisely. Brain MRI showed lesions in the right superior temporal lobe, temporal plate, and right and left precentral gyri. Neuromusicological assessments revealed severe beat impairment and moderate pitch impairment. We diagnosed her with beat deafness of music, possibly caused by the bilateral precentral gyri lesions.
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