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The greater nerve to the muscle is the femoral nerve. Unlike the obturator accessory nerve, the femoral nerve is always present and provides the sole innervation for the pectineus muscle in over 90% of cases. The muscle is also innervated by the accessory obturator nerve in the 8.7% of cases in which the nerve occurs. [5]
After a short course of about 4 cm in the thigh, the nerve is divided into anterior and posterior divisions, separated by lateral femoral circumflex artery. [2] Nerve to pectineus - This nerve arises from the femoral nerve just above the inguinal ligament. It passes behind the femoral sheath to reach the anterior surface of the pectineus muscle ...
Spatially, it is in this location, but functionally, it is more similar to the other lateral rotator group muscles). The pectineus is sometimes included in this group, [1] [3] and sometimes excluded. [2] [4] It has the same function as the others in this group, but different innervation – namely, the femoral nerve.
Femoral nerve: Medial compartment (inner thigh/groin) Pectineus, [2] External obturator, Gracilis muscle, Adductors (longus, brevis, and magnus) Obturator nerve: Posterior compartment (back of the thigh) 'hamstring portion' of the Adductor magnus, Biceps femoris, Semitendinosus and Semimembranosus: Sciatic nerve
Femoral nerve blocks are very effective. [3] During pelvic surgery and abdominal surgery, the femoral nerve must be identified early on to protect it from iatrogenic nerve injury. [4] The femoral nerve stretch test can be performed to identify the compression of spinal nerve roots. [5] The test is positive if thigh pain increases. [5]
The nerve of the anterior compartment of thigh is the femoral nerve. [2] Innervation for the quadriceps muscles come from the posterior division of the femoral nerve, while the anterior division (which contains cutaneous as well as muscular components) gives a lateral and a medial branch, the second being responsible for the innervation of the sartorius muscle. [4]
The pectineus is the only adductor muscle that is innervated by the femoral nerve. The other adductor muscles are innervated by the obturator nerve [1] with the exception of a small part of the adductor magnus which is innervated by the tibial nerve. [4]
The obturator nerve is responsible for the sensory innervation of the skin of the medial aspect of the thigh.. The nerve is also responsible for the motor innervation of the adductor muscles of the lower limb (external obturator, [4] adductor longus, adductor brevis, adductor magnus, gracilis) and the pectineus (inconstant).