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Here is a quick mnemonic “NECROSIS to remember about Myopathic Weakness

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

Myopathic Weakness : How To Remember Easily ?

  • N: Necrosis causes a reduction in the number of muscle fibers within motor units.
  • E: EMG shows decreased size of each motor unit action potential.
  • C: Contractile force of muscle fibers is lost in some myopathies.
  • R: Rapid recruitment of motor units is necessary in myopathies with muscle fiber necrosis.
  • O: Overall, weakness is produced by a decrease in the number or contractile force of muscle fibers.
  • S: Selective involvement of type II (fast) fibers contributes to weakness in certain myopathies.
  • I: Inflammatory myopathies and muscular dystrophies can lead to myopathic weakness.
  • S: Size discrepancy between electrical activity and force of a muscle indicates certain myopathies.

Mnemonic : NECROSIS

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