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Related Experiment Videos

Right-sided anarchic (alien) hand: a longitudinal study.

S Della Sala1, C Marchetti, H Spinnler

  • 1Department of Clinical Neurophysiology, San Paolo Hospital, Milan.

Neuropsychologia
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

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Alien hand phenomenon, a neurological disorder, can result from specific brain lesions. This study differentiates acute cases from chronic ones based on lesion location and type.

Area of Science:

  • Neuroscience
  • Neurology
  • Clinical Neuroanatomy

Background:

  • The alien hand phenomenon is a rare neurological disorder characterized by a limb moving involuntarily.
  • Understanding the neuroanatomical underpinnings of this phenomenon is crucial for diagnosis and treatment.

Observation:

  • A patient presented with a bilateral frontal vascular lesion affecting the left mesial cortex and corpus callosum.
  • This lesion resulted in the alien hand phenomenon manifesting in the patient's right hand.

Findings:

  • The study discusses various hypotheses regarding the lesions causing the alien hand phenomenon.
  • It proposes differentiating acute conditions (corpus callosum lesion only) from chronic conditions (additional fronto-mesial lesion).

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Implications:

  • This distinction is vital for accurate clinical diagnosis and patient management.
  • Further research into lesion-specific manifestations can refine our understanding of alien hand syndrome.