The thigh bears a lot of the load of the physique’s weight when an individual is upright. It comprises many muscle mass and nerves however solely has one bone, the femur, which is the longest and strongest bone within the human physique.
The 4 muscle mass that make up the quadriceps are the strongest and leanest of all muscle mass within the physique. These muscle mass on the entrance of the thigh are the foremost extensors (assist to increase the leg straight) of the knee. They’re:
- Vastus lateralis
- Vastus medialis
- Vastus intermedius
- Rectus femoris
These 4 muscle mass come collectively to kind a single tendon, which inserts into the patella, or kneecap.
Different muscle mass of the anterior (entrance) thigh embrace the pectineus, sartorius, and theiliopsoas, which is made up of the psoas main and iliacus.
Muscular tissues within the medial thigh assist to carry the thigh towards the midline of the physique and rotate it. These muscle mass are the adductor longus, adductor brevis, adductor magnus, gracilis, and the obturator externus.
The hamstrings are three muscle mass in the back of the thigh that have an effect on hip and knee motion. They start beneath the gluteus maximus behind the hipbone and connect to the tibia on the knee. They’re:
- Biceps femoris
Nerve provide to the thigh comes from numerous lumbar and sacral nerves through the femoral, obturator, and customary peroneal nerves. The tibial and sciatic nerves additionally provide elements of the thigh.
The one bone within the thigh is the femur, which extends from the hip to the knee. It might probably resist forces of 1,800 to 2,500 kilos, so it’s not simply fractured.
Branches of the femoral artery provide the thigh with oxygen-rich blood. The femoral artery is split right into a superficial, deep, and customary arteries, and these additional divide into branches, together with the medial and lateral circumflex arteries. The biggest department of the femoral artery is the deep femoral artery, additionally referred to as the profunda femoris. The femoral vein runs alongside the femoral artery and in addition has many branches. It takes oxygen-depleted blood from the thigh on a path again towards the guts.
Frequent issues with the thigh are sometimes the results of participation in sports activities or repetitive actions. These embrace:
- Muscle strains (pulls or tears)
- Muscle cramps
- Contusions (bruises)
- Tendonitis (irritation of a tendon)
- Sciatica (ache from the sciatic nerve)