Table XXIs.

Perineal motor evoked potentials in cauda equina lesions.

Reference	Objective	No. of patients	Stimulation site	Recording site	Electrode type	Results	Evidence
Schmid et al., 2005	To determine the diagnostic value of pMEPs in cauda equina lesions	14	Motor cortex; LS roots	EUS	Surface	↑ mean Lat of peripheral responses; Ab cortical/peripheral responses: 100% CLs	Class 1

Abbreviations: pMEPs=perineal motor evoked potentials; LS=lumbosacral; EUS=external urethral sphincter; Lat=latency; Ab=absent response; CLs=complete lesions.