Base-Line Healing


Anatomy in detail.



The rectus femoris muscles extend from pelvis to tibia (hip bone to shin bone) at the anterior (front) of the femur (thigh bone).


rectus straight

femoris femur

The rectus femoris muscles cross the hip and knee joints.

When fully engaged the rectus femoris muscles position the legs correctly to the torso.

rectus femoris keeping it simple

The rectus femoris are 1 of the 4 muscles in the quadriceps femoris muscle group, along with the 3 "vasti" muscles: the vastus lateralis, vastus intermedius and vastus medialis.

The rectus femoris is the only one of the quadriceps that attaches to the pelvis and crosses the hip joint.

The vasti muscles attach to the top of the femur.

left leg showing the rectus femoris muscle, right leg showing the quadriceps femoris muscles - rectus femoris vastus medialis and vastus lateralis can be seen. The vastus intermedius lies deep to the rectus femoris. The rectus femoris is the only muscle of the quadriceps group that attaches to the pelvis. The 3 vasti muscles attach to the top of the femur. The distal tendons of the four muscles merge to form the common tendon of the quadriceps - to kneecap - to tibia.

The quadriceps are share a common attachment to the tibia via connective tissues (tendon/ligament) that contain the patella (kneecap.

The distal (end furthest from center of body) tendons of these 4 muscles merge to form the common quadriceps tendon above the knee.

The common quadriceps tendon attaches/contains the patella. (pulling kneecaps up)

From the patella the connective tissue continues as the patellar ligament which attaches to the tibial tuberosity of the tibia.

The rectus femoris can be thought of as the lead muscle of the quadriceps.

The pelvic attachments of the rectus femoris muscles are commonly described as "to the ilium of the pelvis via two heads - the straight head and the reflected head" but it is not that simple - variations in the pelvic attachments have been observed.

attachments of the rectus femoris muscles to the pelvis. There is some variation between individuals in number and location of the heads - the attachments - of the rectus femoris.  Like little anchors put out by the muscle around the main straight head.

Anatomy - A Few More details.

The heads of the rectus femoris merge into an aponeurosis (thin sheet of strong connective tissue), from which the muscle fibres arise as the aponeurosis continues distally (away from the center of the body) on the anterior (front) surface of the muscle.

The lower two-thirds of the posterior (back) surface of the rectus femoris consists of a thick, broad aponeurosis that becomes narrowed into a flattened tendon attached to the patella.  This forms the superficial, central part of the common quadriceps tendon.

Working in conjunction with the gluteus maximus, the rectus femoris provide strength and stability to connect your legs to your Base-Line.

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