===========================+===============+===========+======+=========== | T.p. | T.c.p. |T.c.a.| P.p. +---------------+-----------+------+----------- |1|1|2|2|3|3|4|5|1|1|2|2|3|4|1|1|2 |1|1|2|3|3|4 |L|R|L|R|L|R|L|R|L|R|L|R|L|L|L|R|L |L|R|L|L|R|L ---------------------------+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+--+-+-+-+-+-+- Lumbosacral plexus | | | | | | | | | | | | | | | | | | | | | | | two fureal nerves | | |x|x| | | | | | | | | | |x|x| | | | |x|x|x S9 with three branches | | | | | | | |x| | | | | | | | | | | | | | | prefixed | | | | | | | | | | | | |x| |x|x|x | | |x|x|x|x sciatic nerve with six | | | | | | | | | | | | | | | | | | | | | | | roots | | |x|x| | | | | | | | |x| |x|x|x | | |x|x|x|x obturator nerve from S2 | | | | | | | | | | | | | | | | | | | | | | | and S3 only | | | | | | | | | | | | | | | | |x | | | |x|x|x femoral nerve mainly from | | | | | | | | | | | | | | | | | | | | | | | S2-S4 | | | | | | | | | | | | |x| |x|x|x | | |x|x|x|x | | | | | | | | | | | | | | | | | | | | | | | Femoral nerve | | | | | | | | | | | | | | | | | | | | | | | anterior division | | | | | | | | | | | | | | | | | | | | | | | innervates | | | | | | | | | | | | | | | | | | | | | | | extensor iliotibialis | | | | | | | | | | | | | | | | | | | | | | | lateralis | | | | | | |x|x| |x|x| |x| | | | | | | | | | dorsal division fused with| | | | | | | | | | | | | | | | | | | | | | | anterior division |x| | | | | | | | | | | | | | | | | |x| |x| |x dorsal division fused with| | | | | | | | | | | | | | | | | | | | | | | middle division | | |x|x| |x| | | | | | | | |x| | | | |x|x| | two branches to iliacus | | |x| | | | | | | | | | | | | | | | | |x| | middle division anasto- | | | | | | | | | | | | | | | | | | | | | | | moses with anterior | | | | | | | | | | | | | | | | | | | | | | | division | | |x|x| | | | | | | | | |x|x|x| | | | | | | anterodorsal division does| | | | | | | | | | | | | | | | | | | | | | | not go through femoral | | | | | | | | | | | | | | | | | | | | | | | notch | | | | |x|x| | | | | | | | | | | | | | | | | branch of anterior divi- | | | | | | | | | | | | | | | | | | | | | | | sion perforates iliacus | | | | | | | | | | | | | | | |x| | | | | | | cutaneous branch perfo- | | | | | | | | | | | | | | | | | | | | | | | rates extensor ilioti- | | | | | | | | | | | | | | | | | | | | | | | bialis lateralis | | | | | | | | | | |x|x| | | | | | | | | | | branch of middle division | | | | | | | | | | | | | | | | | | | | | | |