Principles of Functional Exercise

Common distortions due to tightness is a median and ulnar nerve entrapment. It is important to
assess these muscles, along with other soft tissues in the forearm and wrist, with carpal tunnel
syndrome.

PRONATOR TERES

Joint Action performed by the Forearm

1. Secondary pronator


2. Flexes

For example it turns the palm of the hand downward

Origin: 1. Humerus – Medial epicondyle

2. Ulna – Coronoid process

Insertion: Radius (midway along lateral aspect)

Common distortions due to tightness is a median nerve entrapment mimicking or contributing
to carpal tunnel syndrome

PRONATOR QuADRATuS

Joint Action performed by the Forearm

1. Primary pronator

For example it helps to turn the palm down

Origin: Ulna – Anterior aspect of distal quarter

Insertion: Radius - Anterior aspect of distal quarter

Common distortions due to tightness is a lateral epicondylosis caused by overloading
of the supinator