Functional Rehab Academy
Pronator quadratus
Muscle origin
Distal anterior surface of ulna
Muscle insertion
Distal anterior surface of radius
Muscle function
Pronation of forearm and control of Radioulnar joints
Nerve innervation
C7-8 (Lovett reactor T10-11)
Primary muscle type
Phasic / Type I (60-70%)
Myofascial lines
- None
Primary inhibatory muscles
Related joints
- Radioulnar joints
Upper part
Client is supine with the elbow in a 90 deg. flexion and forearm in full pronation. Grab around the wrist and apply pressure towards supination – trying to twist the forearm and palm around.
Lower part
Client is supine with the elbow in a 120 deg. flexion and forearm in full pronation. Grab around the wrist and apply pressure towards supination – trying to twist the forearm and palm around.
Functional anatomy for
Pronator quadratus
Organ relationship (T1-L2, n. Vagus)
- Heart (FA)
- Symp – T1-6 (Cardiac plexus)
- Parasymp – CX (Vagus)
- Stomach (AK)
- Symp – T5-9 (Celiac plexus)
- Parasymp – CX (Vagus)
- Kidneys (AK)
- Symp – T10-L2 (Renal plexus)
- Parasymp – None (CX minimal)
Associated muscles
- Biceps brachii – Control of Radioulnar joints
- Brachioradialis – Control of Radioulnar joints
- Triceps brachii lateral part – Pronation of forearm through fascial pull
- Pronator teres – Pronation of forearm and control of Radioulnar joints
- Supinator – Control of Radioulnar joints
- Flexor carpi ulnaris/radialis – Control of elbow and Radioulnar joints
- Extensor carpi ulnaris/radialis – Control of elbow and Radioulnar joints