Functional diagnosis using multimodal spinal cord evoked potentials in cervical myelopathy

Area of Science:

• Neurosurgery
• Neurology
• Diagnostic Imaging

Background:

• Spinal cord evoked potentials (SCEPs) diagnose cervical myelopathy.
• Multimodal SCEPs are underutilized for this diagnosis.
• Cervical laminoplasty is a surgical procedure for cervical myelopathy.

Purpose of the Study:

• Correlate multimodal SCEPs with MRI findings in older (≥70 years) versus younger (<65 years) patients undergoing cervical laminoplasty.
• Assess age-related differences in SCEP and MRI findings for cervical myelopathy.
• Evaluate the diagnostic accuracy of MRI in elderly patients with cervical myelopathy.

Main Methods:

• Recorded multimodal SCEPs during cervical laminoplasty.
• Analyzed MRI abnormalities.
• Compared SCEP and MRI findings between age groups (18 older, 32 younger patients).

Main Results:

• Both SCEPs and MRIs indicated higher incidences of multi-level cord involvement in older patients.
• Discrepancies between SCEP and MRI findings were more common in older patients (67%) than younger patients (19%).
• MRI accuracy for lesion localization was significantly lower in older patients, suggesting detection of clinically silent compression.

Conclusions:

• MRI may overestimate spinal cord compression in elderly patients due to clinically silent findings.
• Intraoperative multimodal SCEP studies complement MRI, providing functional insights into myelopathy pathology in older adults.
• Electrophysiological evaluation is crucial for accurate diagnosis and management of cervical myelopathy in the elderly.