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Here is a quick mnemonic “CORTICAL LESION to remember about Hemiparesis

This can be valuable for patients as well as medical doctors, nurses & students doing their clinical rounds. You can also find it very useful for med exams like USMLE, NEET PG, FMGE, NExT & NCLEX exams

Hemiparesis : How To Remember Easily ?

  • C – Cortical lesion is indicated by language disorders.
  • O – Other neurologic deficits help localize the lesion.
  • R – Reflecting either cortical or subcortical hemispheric lesion, homonymous visual field defects occur.
  • T – “Pure motor” hemiparesis can be caused by a small, discrete lesion in the posterior limb of the internal capsule, cerebral peduncle, or upper pons.
  • I – Ipsilateral cranial nerve signs and contralateral hemiparesis indicate certain brainstem lesions.
  • C – Cranial nerve signs or facial weakness being absent suggests a high cervical spinal cord lesion.
  • A – Associated with Brown-Séquard syndrome, weakness on one side is accompanied by loss of joint position and vibration sense, and loss of pain and temperature sense on the opposite side.
  • L – Lesions above the midcervical spinal cord often result in hemiparesis due to upper motor neuron involvement.
  • L – Localization of the lesion is facilitated by the presence of other neurologic deficits.
  • E – Either cortical or subcortical hemispheric lesion can cause homonymous visual field defects.
  • S – Small, discrete lesions in specific brain regions can lead to “pure motor” hemiparesis.
  • I – Ipsilateral cranial nerve signs and contralateral hemiparesis are seen in certain brainstem lesions.
  • O – Opposite to cranial nerve signs or facial weakness, a high cervical spinal cord lesion is suggested when weakness is present.
  • N – Neurologic deficits, such as loss of joint position and vibration sense, and loss of pain and temperature sense, are observed in Brown-Séquard syndrome.

Mnemonic : CORTICAL LESION

Dr. Arin Nandi

Passionate About Medical Science & Helping Future Doctors Achieve Top Ranks In Medical Exams. He is professionally a dentist as well as a public health expert from JIPMER (1), (2)working in health department
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