Table XXIIs.

Perineal motor evoked potentials in spinal cord lesions.

Reference	Objective	No. of patients	Stimulation site	Recording site	Electrode type	Results	Evidence
Eardley et al., 1991	To determine the diagnostic value of pMEPs in patients with MS and LUTSs	10	Motor cortex; LS roots	EUS	Needle	Ab cortical responses: 50%, ↑ CCT: 20%	Class 2
Ghezzi et al., 1995	To determine the diagnostic value of pMEPs in MS and the association between pMEPs and EDs	34	Motor cortex; LS roots	BC	Surface	↑ CCT: 61%	Class 2
Brostrøm, 2003	To determine the diagnostic value of pMEPs in patients with MS and LUTSs	16	Motor cortex; LS roots	PR	Needle	↑ mean CCT, ↑ rate of Ab cortical responses	Class 1
Schmid et al., 2005	To determine the diagnostic value of pMEPs in patients with suprasacral SCI or MS and LUTSs	19	Motor cortex; LS roots	EUS	Surface	↑ mean CCT, Ab cortical responses: 100% in CLs	Class 1

Abbreviations: pMEPs=perineal motor evoked potentials; MS=multiple sclerosis; LUTSs=lower urinary tract symptoms; EDs=erectile dysfunctions; SCI=spinal cord injury; LS=lumbosacral; EUS=external urethral sphincter muscle; BC=bulbo-cavernosus muscle; PR=puborectalis muscle; Ab=absent response; CCT=central conduction time; CLs=complete lesions.