The muscles of upper legs are made up of large and powerful muscles bundled together to achieve their common function, which is motion. The primary role of these muscles is for movement, coordination, and balance. They cause movement at the hip and knee areas which facilitate walking. It is therefore important to understand the upper leg muscles in order to create an insight on how to take care of it.
Overview of the Large Muscles of Upper Legs
Muscles of upper legs are massive and large. It holds the body upright against the pull of gravity and causes various movements at the hip joint. The upper leg muscles function as a flexor and an extensor. Because many of the upper leg muscles also have attachments on the pelvic girdle, they can cause movement at the hip joint as well.
Different Parts of the Muscles of Upper Legs
- Gluteus maximus
- Gluteus medius
- Adductor Muscles
- Biceps femoris
- Rectus femoris
- Vastus muscles
There are two categories of the upper leg muscles depending on which joint they work on. These are the muscles causing movement at the hip joint, and muscles causing movement at the knee joint.
Upper Leg Muscles Causing Movement at Hip Joint
These groups of muscles work on the movements at the hip joint. One of the largest muscles of the body is the gluteus maximus. It forms the buttocks and is very evident in the human eyes. Because of its size, the gluteus maximus can extend the hips to bring the thigh in a vertical plane with the pelvis. Inferior to gluteus maximus is the gluteus medius that extends from the ilium to the femur. The primary function of the gluteus medius is to stabilize the pelvis during walking and to abduct the hip. Intramuscular injection is commonly delivered here. There are two muscles which are the iliacus and psoas major that fuse together to form the iliopsoas. These muscles are primarily hip flexor and acts on keeping the upper body straight. Adductor muscles are at the lateral side of the thigh which presses the legs to adduct it.
Upper Leg Muscles Causing Movement at Knee Joint
The muscles of upper legs forming the muscle mass of the posterior thigh are the hamstrings. These are composed of semitendinosus, semimembranosus and biceps femoris which originate on the ischial tuberosity and run the thigh. The Sartorius is the longest muscle of the body and is a thin, strap-like muscle. It originates form the front side of the iliac crest and terminates at the middle side of the tibia. The quadriceps group is has three vastus muscles and one femoris muscle.
Summary on the Muscles of Upper Legs
The muscles of upper legs are grouped together according to how they function. It is either they cause movement to the hip joint or to the knee joint. Upper leg muscles are large and powerful muscles necessary for balance and extreme movements. Without these muscles, it would be very impossible to gain balance as well as do extreme tasks.
These groups of muscles are incredible for they are able to accomplish great movements that a human body needs. Functions of the muscles of upper legs are very important and should be thoroughly understood.