Normative data for lateral femoral cutaneous nerve SEPs.
OBJECTIVE
To determine normative values for somatosensory evoked potentials (SEPs) of the lateral femoral cutaneous nerve (LFCN).


METHODS
The LFCN was stimulated at two points, one located 1 cm lateral to the midpoint of a line joining the anterior superior iliac spine (ASIS) and the patella (31 subjects), and the other one located 12 cm distal to the ASIS (24 subjects). Recordings were performed at Cz' (2 cm behind Cz)-Fz.


RESULTS
Reproducible SEPs were obtained in all but one of the 31 subjects to ASIS-patella midpoint (mean P1 latency: 33.2+/-3.5 ms, mean side-to-side difference: 2.0+/-1.6 ms) and in all but three of the 24 subjects to stimulation 12 cm distal to the ASIS (mean P1 latency: 30.9+/-3.3 ms, mean side-to-side difference: 2.2+/-1.7 ms).


CONCLUSIONS
Reliable SEPs can be obtained to LFCN stimulation. It is easier and, therefore, more convenient to stimulate the ASIS-patella midpoint.
Oflazoğlu
Buket
B
Institute of Neurological Sciences, Marmara University, Istanbul, Turkey. g.b.oflazoglu@superonline.com
Erdoğan
Neşe
N
Somay
Göksel
G
Us
Onder
O
D000293:Adolescent; D000328:Adult; D005073:Evoked Potentials, Somatosensory; D005267:Femoral Nerve / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D012016:Reference Values; D012867:Skin / Q000294:innervation*