The overall function of the quadriceps group is knee extension via their distal attachments at the patellar tendon. Its blood supply is from the medial circumflex femoral branch of the femoral and obturator artery. The pectineus is also unique as it adducts the thigh and flexes the hip it is usually innervated by the femoral nerve but is sometimes innervated by the obturator nerve. The sartorius is unique in that it flexes and laterally rotates the hip joint and flexes the knee, is innervated by the femoral nerve (L2 through L4), and receives blood supply by the muscular branches of the femoral artery. Innervation to the iliacus is by the muscular branch of the femoral nerve (L1 through 元), while the direct fibers of L1 innervate the psoas through 元 lumbar plexus. The iliacus and the psoas are both flexors of the thigh in relation to the torso and receive blood supply from the lumbar branch of the iliopsoas of the internal iliac artery. The pectineus is a smaller muscle that arises at the eponymous pectineal line of the pubis and inserts at the upper femoral shaft behind the lesser trochanter. ![]() The sartorius muscle is the longest in the body and crosses from the anterior superior iliac spine inferomedially to insert at the supper medial part of the tibia. ![]() Psoas major arises from the lower border of the T12 vertebra to the L5 vertebra, and it extends downwards under the inguinal ligament with iliacus to inserts beside it at the lesser trochanter of the femur. The iliacus arises from the iliac fossa within the bony pelvis and inserts at the upper part of the femur. The hip flexors are composed of the iliacus, psoas major, sartorius, and pectineus. This compartment includes two subgroups of muscles: those that are hip flexors and hip abductors, and the knee extensors (called collectively the quadriceps) ![]() The muscles of the gluteal region are also important to the function of the lower limb but are considered in a separate article. The thigh muscles are divided into three compartments: the anterior, medial, and posterior thigh muscles, each of which contains multiple muscles which broadly share the same functional action, innervation, and arterial supply.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |