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[Bimanual mirror letter writing: a post-traumatic case]

G Morís1, R Quirce, J Berciano

  • 1Servicio de Neurología, Hospital Universitario Marqués de Valdecilla, Santander.

Neurologia (Barcelona, Spain)
|January 8, 1998
PubMed
Summary

Mirror writing, typically affecting one hand after brain injury, can occur in both hands. This case study shows isolated bimanual mirror writing may indicate temporary dominant hemisphere dysfunction.

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Area of Science:

  • Neuroscience
  • Neurology
  • Cognitive Science

Background:

  • Mirror writing is a rare phenomenon, usually linked to lesions in the dominant brain hemisphere and affecting a single hand.
  • Understanding the neurological underpinnings of atypical writing patterns is crucial for diagnosing and managing brain injuries.

Observation:

  • A patient developed bimanual mirror writing following a cranial injury, without other focal neurological deficits.
  • The only abnormal finding was reduced blood flow (hypoperfusion) in the left parieto-occipital region, visualized via SPECT scan.
  • No psychological disorders were identified as a cause for the observed dysgraphia.

Findings:

  • The patient exhibited isolated bimanual mirror writing, a presentation not typically associated with dominant hemisphere lesions.

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  • Cranial injury led to temporary left parieto-occipital hypoperfusion.
  • The mirror writing symptoms resolved spontaneously within three months.

    • Implications:

    • Isolated bimanual mirror writing could be a transient indicator of reversible parieto-occipital dysfunction in the dominant hemisphere.
    • This case expands the understanding of potential neurological manifestations following head trauma.
    • Further research is warranted to explore the specific neural mechanisms underlying reversible bimanual mirror writing.