femoral nerve: one of a pair of nerves that originate from lumbar nerves and supply the muscles and skin of the anterior part of the thigh
spinal nerve: any of the 31 pairs of nerves emerging from each side of the spinal cord (each attached to the cord by two roots: ventral and dorsal)
wood rat: any of various small short-tailed rodents of the northern hemisphere having soft fur grey above and white below with furred tails and large ears; some are hosts for Ixodes pacificus and Ixodes scapularis (Lyme disease ticks)