Prognostic value of motor evoked potentials in motor function recovery of upper limb after stroke

Assunta Pizzi, Riccardo Carrai, Catuscia Falsini, Monica Martini, Sonia Verdesca, Antonello Grippo

Research output: Contribution to journalArticlepeer-review


Objective: To determine the prognostic value of clinical assessment and motor evoked potentials for upper limb strength and functional recovery after acute stroke, and to establish the possible use of motor evoked potentials in rehabilitation. Design: A prospective study. Subjects: Fifty-two patients with hemiparesis were enrolled one month post-stroke; 38 patients concluded the study at 12 months. Methods: Motor evoked potentials were recorded at baseline and after one month. Upper limb muscular strength (Medical Research Council Scale, MRC) and functional tests (Frenchay Arm Test, Barthel Index) were used as dependent outcome variables 12 months later. Motor evoked potentials were classified as present or absent. Predictive values of motor evoked potentials and MRC were evaluated. Results: At 12 months, patients with baseline recordable motor evoked potentials showed a good functional recovery (positive predictive value 94%). The absence of motor evoked potentials did not exclude muscular strength recovery (negative predictive value 95%). Motor evoked potentials had a higher positive predictive value than MRC only in patients with MRC

Original languageEnglish
Pages (from-to)654-660
Number of pages7
JournalJournal of Rehabilitation Medicine
Issue number8
Publication statusPublished - Jul 2009


  • Motor evoked potentials
  • Outcome
  • Rehabilitation
  • Stroke
  • Upper limb

ASJC Scopus subject areas

  • Rehabilitation
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Medicine(all)


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