Contents
Anatomy
Referred pain pattern
Muscle Type
- Postural
- Shortens when overactivated
Symptoms
- Lower back pain while coughing or sneezing
- Muscular guarding of lumbar region
- Compensatory scoliosis
- Functional short leg, in elevation of ilium
- Restricted flexion of spine
Possible causes for tension
- Lower leg length differential may cause tension in the QL as it tries to compensate
- Trauma such as car collisions
- Activity in which the persons needs to be forward bent, such as gardening
- Walking/running along a slope causing an uneven height difference in the pelvis
- Overload especially during twisted positions
Videos
Detailed version
Important functions
- Quadratus lumborum has a major stabilizing function on the lower back
- It has also been theorized that it has a role in stabilizing the last rib during inhalation and forced exhalation
- The fibers of the Quadratus Lumborum also merges with the diaphragm, which makes involvement in respiratory functions even more likely
NOTES OF CLINICAL IMPORTANCE
- When there is noted dysfunction in the Quadratus Lumborum, it is important to keep in mind that this can be due to tightness in the other muscles which stabilizes the region, especially the iliopsoas, erector spinae and rectus abdominis
MyoFascial line
Deep ventral line
- Suprahyoid muscles
- Infrahyoid muscles
- Scaleni
- Fascia prevertebralis
- Longus colli and capitis
- Pericardium
- Mediastinum
- Parietal pleura
- Fascia pretrachialis
- Fascia endothoracica
- Transversus Thoracis
- Diaphragma
- Anterior longitudinal ligament
- Iliopsoas
- Pectineus
- Anterior intermuscular septum
- Adductor brevis and longus
- Anterior sacral fascia
- Pelvic floor fascia
- Levator ani
- Obturator internus fascia
- Posterior intermuscular septum
- Adductor Magnus and minimus
- Fascia Popliteus, knee capsule
- Tibialis posterior
- Flexor hallucis longus and flexor digitorum longus
Additional Functional Muscles Supporting The Deep Ventral Line
- Deep lateral rotators of the hip
- Is fascially connected to the Adductor Magnus
- Quadratus lumborum
- The anterior surface is fascially continous to the iliacus
Synergists