|
The
Femoral and Sciatic Nerves
Femoral Nerve
Place the active recording electrode over the vastus medialis muscle
and the reference electrode on the patella.
Stimulate the nerve in the groin over the femoral triangle or at Hunter's
canal. You can also stimulate it above the inguinal ligament.
Because this nerve is difficult to stimulate in obese patients, especially
above the inguinal ligament, needle electrodes may be used for that purpose.
Femoral
Entrapment, Compression or Injury Sites
The femoral nerve may be entrapped underneath the ligament in its abdominal
course by a multitude of factors ranging from hemorrhage to fractures and
injuries; or along its entire course in diabetes.
Sciatic Nerve
Place the recording electrodes on those muscles used in peroneal or
posterior tibial testing. The stimulating electrode must be a needle electrode
over the sciatic notch, which is halfway between the ischial tuberosity
and greater trochanter.
Sciatic
Entrapment, Compression or Injury Sites
The sciatic nerve may be injured high along its course at the roots
and plexus level; underneath the pyriformis muscle; in the buttock (most
notoriously by injury from intramuscular injections); and along its entire
course in the thigh by fracture, missile wounds orother types of injuries.
 Table
of Contents Chapter Index 
| 
