Left unilateral behavioral disorder with diagonistic dyspraxia following callosal and right centrum semiovale lesions: Implications for interhemispheric and fronto-parietal motor connectivity.
Nami Ihori, Nonoka Kuboshima, Shigeo Araki et al.
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Case in brief
A 58-year-old right-handed patient exhibited diagnostic dyspraxia of the left hand due to infarct lesions in the right centrum semiovale and corpus callosum. Symptoms included involuntary actions of the left hand, such as mirroring the right hand's movements and grasping objects without intention. Linguistic tests revealed errors in the left hand during both verbal commands and imitation tasks, indicating complex interhemispheric and intrahemispheric disconnection.
What made this case unusual
The patient displayed involuntary grasping and release behaviors not typically associated with classic diagnostic dyspraxia, highlighting a unique presentation linked to specific brain lesions.
Diagnostic / clinical pearl
Clinicians should consider the possibility of dual disconnection mechanisms in patients with dyspraxia, particularly when symptoms include involuntary movements and atypical grasping behaviors.
Why it matters
Understanding the interplay between interhemispheric and intrahemispheric connectivity can enhance the diagnosis and management of motor disorders following specific brain lesions.