Usefulness of Diffusion Tensor Imaging in Unexplained Ipsilateral Hemiplegia

Area of Science:

• Neurology
• Radiology
• Neuroscience

Background:

• Ipsilateral hemiparesis is an uncommon neurological finding with poorly understood causes.
• Understanding the precise lesion and pathomechanisms is crucial for prognosis and rehabilitation.

Observation:

• A case study involving a patient with a left traumatic subdural hematoma and left spastic hemiparesis is presented.
• Advanced diffusion tensor imaging (DTI) was utilized to investigate the neurological pathways involved.

Findings:

• The study identified injury to the right corticospinal tract, specifically compression of the cerebral peduncle, as the cause of the ipsilateral hemiparesis.
• This phenomenon is recognized as Kernohan's notch phenomenon.
• DTI proved effective in pinpointing the exact location and nature of the neural pathway damage.

Implications:

• This case highlights the diagnostic utility of diffusion tensor imaging in elucidating complex neurological presentations.
• The findings contribute to a better understanding of Kernohan's notch phenomenon and its underlying mechanisms.
• Accurate pathomechanism identification aids in predicting patient outcomes and guiding therapeutic strategies.