Every turn of the forearm, palm up or palm down, is done by three muscles: the pronator teres, the pronator quadratus and the supinator. They work against one another constantly, in typing, gripping, lifting and turning objects, and when they fatigue without rest they lock in spasm, the forearm ends up resisting itself, and the radius is held in compression. Rotation becomes restricted and painful, turning the palm upward is weak, and sharp discomfort appears with the smallest twist: a key in a lock, a door handle, a jar lid. The pronators also press on the median nerve on its way to the hand, enough to cause discomfort, though not the full carpal tunnel syndrome, which comes from the palmaris longus. Releasology releases the pronator-supinator complex directly, so the forearm turns freely in both directions again.

What this release relieves

• Pain turning a key, a doorknob or a jar lid. Those movements are pure forearm rotation against muscles in spasm. Once they release, the sharp catch disappears.
• Restricted forearm and wrist rotation. Pronators and supinator in spasm block each other; releasing both restores full rotation.
• Weakness turning the palm upward. The supinator in spasm cannot contract further and tests weak. Released, supination strength returns.
• Localised pain near the elbow or along the radius. The pronator teres attaches at the inside of the elbow and the supinator wraps the radius; both ache at their attachments when in spasm.
• Median nerve discomfort from the pronators. The median nerve passes between the heads of the pronator teres and under the pronator quadratus. In spasm they compress it enough to cause aching and irritation into the hand; releasing them relieves it.
• Forearm tension and compression through the forearm. Continuous pronator contraction compresses the two forearm bones together. Releasing it takes that pressure off.

Pronation and supination are fundamental movements of the forearm.

They allow the hand, forearm and wrist to rotate so the palm faces down (pronation) or up (supination).

​

These movements are controlled by three primary muscles:

• Pronator teres

• Pronator quadratus

• Supinator

These muscles function as antagonists:

• Pronators turn the forearm, wrist and hand palm-down

• Supinator turns forearm, wrist and hand palm-up (so one could hold a bowl of soup)

When balanced, this system is smooth, coordinated, and effortless.

When one or more of these muscles enter spasm:

• supination and pronation becomes restricted

• tension builds through the forearm

• pain develops around the elbow and deep forearm

This is not "stiffness".

👉This is a group of symptoms caused by spasm of these three muscles. The supinator trying to involuntarily supinate and the pronators trying to pronate.

Frequently asked questions

Is this carpal tunnel?

Not the full syndrome. The pronators compress the median nerve enough to cause discomfort, but in our experience every true carpal tunnel syndrome, with the hand going numb, is the palmaris longus in spasm (Modality 21). When both are involved, both are released.

Is this golfer's elbow?

Golfer's elbow (Modality 21) is the palmaris longus pulling at the inside of the elbow with wrist and hand symptoms. When the pain is specifically with rotation, turning the palm up or down, the pronator-supinator complex is the source. They are neighbours and are often released together.

Why does typing make it worse?

Typing holds the forearms pronated for hours. The pronators fatigue, lock, and the supinator fights them. Releasing the complex relieves it; the modality teaches a self-release for long days at the keyboard.