Related Experiment Videos
Agraphia with abnormal writing stroke sequences due to cerebral infarction
Shinichiro Maeshima1, Eri Sekiguchi, Koji Kakishita
1Department of Physical Medicine & Rehabilitation, Wakayama Medical University, Wakayama, Japan. maeshima@wakayama-m
Brain Injury
|March 15, 2003
Summary
This study details a case of apractic agraphia in a 65-year-old man with a left frontoparietal infarct. The findings suggest agraphia resulted from impaired motor programming for writing.
Area of Science:
- Neuroscience
- Neurology
- Cognitive Science
Background:
- Agraphia, the loss of the ability to write, can manifest in various forms following brain injury.
- Apractic agraphia specifically involves difficulties in the motor execution of writing, distinct from language-based deficits.
Observation:
- A 65-year-old man presented with gait and speech disturbances, including mild right hemiparesis.
- He exhibited preserved spontaneous speech, naming, word fluency, and reading abilities.
- Impairments were noted in sentence repetition, verbal comprehension, and significantly in writing, characterized by slow, hesitant strokes and fragmented letter formation.
Findings:
- Neuroimaging revealed a subcortical infarct in the left frontoparietal region.
- The patient's writing difficulties aligned with characteristics of apractic agraphia.
- The agraphia was attributed to the loss or unavailability of the memory for motor patterns essential for writing.
Implications:
- This case highlights the specific neural substrates underlying the motor planning of writing.
- Understanding apractic agraphia aids in differential diagnosis and targeted rehabilitation strategies for writing impairments.
- It underscores the complex interplay between motor control and cognitive functions in written communication.