Final answer:
The medial thigh's sensory innervation is provided by the obturator nerve, a branch of the anterior division of the lumbar plexus. The femoral nerve, an anterior division nerve from the lumbar plexus, innervates the anterior thigh muscles, including the quadriceps femoris group for knee extension and leg raising.
Step-by-step explanation:
The question pertains to the classification of sensory nerves in the femoral medial thigh and their functions. The medial compartment of the thigh includes muscles such as the adductors, pectineus, and gracilis. These muscles are primarily responsible for adducting the femur at the hip. Sensory innervation of the medial thigh is provided by the obturator nerve, which is a branch of the anterior division of the lumbar plexus. The anterior compartment of the thigh contains the quadriceps femoris group, which is innervated by the femoral nerve and functions to extend the knee and assist in raising the leg.
The femoral nerve itself is an anterior division nerve, which arises from the lumbar plexus and provides motor and sensory function to the anterior thigh. Sensory fibers from the femoral nerve innervate the skin of the anterior and medial thigh, as well as the medial leg and foot.