Psoas major

Functional Rehab Academy

Muscle origin
Vertebral bodies and intervertebral discs from T12-L4, and transverse processes of L1-L5.

Muscle insertion
Lesser trochanter of femur as iliopsoas tendon

Muscle function
Hip flexion and external rotation. Extension and stabilization of the lumbar spine. Anterior pull on Ilium.

Nerve innervation
L1-L4 (Lovett reactor C2-C5)

Primary muscle type
Tonic / Type I (65-70%)

Myofascial lines
Deep front line

Primary inhibatory muscles
Diaphragm, opposite Psoas major, Quadratus lumborum (both sides), Adductor magnus, Semitendinosis, Semimembranosus, Biceps femoris, Piriformis

Organ relationship (T5-L2, Sacrum, n. Vagus)

Pancreas (FA)
- Symp T5-10 (Celiac plexus)
- Parasymp – CX (Vagus)
Small intestine (FA)
- Symp – T5-12 (Celiac and superior Mesenteric plexus)
- Parasymp – CX (Vagus)
Large intestine (FA/AK)
- Symp – T10-L2 (Mesenteric and Hypogastric plexus)
- Parasymp – CX (Vagus) and S2-S4 (Sacral plexus)
Kidneys (FA/AK)
- Symp – T10-L2 (Renal plexus)
- Parasymp – None (CX minimal)
Bladder (AK)
- Symp – T10-L2 (Inferior Hypogastric plexus)
- Parasymp – S2-4 (Sacral plexus)
Adrenals (FA/AK)
- Symp – T8-L1 (Celiac and Renal plexus)
- Parasymp – None
Reproductive organs (FA)
- Symp – T10-L2 (Inferior Hypogastric, Ovarian and Testicular plexus)
- Parasymp – S2-4 (Sacral plexus)

Diaphragmic part

Client is supine with the leg liftet up into 45 deg. flexion, 30 deg. abduction and full external rotation – knee is straight. Fiksate with one hand on the front of the opposite hip and apply pressure in an oblique angle away from the pubic bone.

Thoracic part

Client is supine with the leg liftet up into 30 deg. flexion, 30 deg. abduction and full external rotation – knee is straigth. Fiksate with one hand on the front of the opposite hip and apply pressure in an oblique angle away from the pubic bone.

Lumbar part

Client is supine with the leg liftet up into 15 deg. flexion, 30 deg. abduction and full external rotation – knee is straight. Fiksate with one hand on the front of the opposite hip and apply pressure in an oblique angle away from the pubic bone.

Functional anatomy for

Psoas major

Related joints

T12-L1
Hip joint
SI joint
Pubic joint

Synergists:

Erector spinae – Lumbar statbility
Transverse abdominus,- Lumbar stability
Quadratus lumborum, – Lumbar stability
Pelvic floor – Lumbar stability
Diaphragm – Lumbar stabiilty
Obliques externus – Lumbar stabilty
Obliques internus – Lumbar stabilty
Rectus abdominus – Lumbar stabilty and sagital plane stability
Latissimus dorsi – Lumbar stabilty
Gluteus maximus, – Lumbar stabilty
Gluteus maximus, – External hip rotation and lumbar stability
Gluteus medius – External hip rotation
Pectineus – Hip flexion and connected in the Deep front line
Adductor brevis – Hip flexion and connected in the Deep front line
Adductor magnus – Connected in the Deep front line
Piriformis – External hip rotation
Rectus femoris – Hip flexion and anterior pull on Ilium
Tensor fascie latae – Hip flexion and anterior pull on Ilium

Release exercises

Corrective strength exercises

Functional Rehab Academy

Manual and practical therapy strategies that will help you find the root cause(s) and achieve faster and better results with your clients.

Functional Rehab Academy is a part of:
Move2Peak Academy ApS, Denmark
contact@functionalrehabacademy.com

Functional Rehab Academy

Psoas major

Functional anatomy for

Psoas major

Release exercises

Corrective strength exercises

Functional Rehab Academy

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