Unlock Your Hip Flexors Pdf Download Mike Westerdal | Page 65

Its action is to bend the thigh upwards or hip flexion and to strengthen
the knee or knee extension. It receives the L2-L4 nerve root supply
through the femoral nerve. Since rectus femora’s is the only muscle of
the quadriceps that crosses over the hip joint as well as the knee joint,
this muscle is more valuable to trauma than the other three quadriceps
muscles which are vast us laterals, vast us medially and vast us
intermediacy.
When the hip and knee are bent as in sitting, crouching or squatting
rectus femora’s and tensor fascia lata muscles are very tight at the hip
and excessively stretched at the knee. This predisposes the muscles to
get easily traumatized.
Additionally aging of the L3, L4 nerve root injury or irritation from
presence of degenerative arthritis of the spine, slipped disc, bulging disc
are also responsible for underlying neurogenic weakness in this muscle.
Since the quadriceps is essential for keeping the knee steady when going
down steps, inclines and in the walking phase after the heel strikes the