GENERAL INFORMATION
The Flexor Carpi Radialis is a muscle located in the anterior compartment of the forearm. It plays a significant role in flexing and abducting the wrist, as well as providing stability to the wrist joint.
ORIGIN
This muscle originates from two points:
- Medial epicondyle of the humerus: This is the bony prominence on the inner side of the elbow.
- Common flexor tendon: This is a broad tendon shared with other forearm flexor muscles.
INSERTION POINT
It inserts onto the base of the second metacarpal bone, which is one of the bones in the hand.
MAJOR ARTERIES
This muscle receives its blood supply from branches of the radial artery.
NEURAL INNERVATION
This muscle is primarily innervated by the median nerve, which originates from the brachial plexus.
TRIGGER POINT
Trigger points in this muscle may cause pain or discomfort in the forearm, wrist, and hand.
CONCENTRIC FUNCTION
The concentric function of the Flexor Carpi Radialis muscle involves the contraction of its muscle fibres, resulting in flexion as well as abduction of the wrist. This muscle assists in movements such as wrist flexion and radial deviation.
ECCENTRIC FUNCTION
The eccentric function of this muscle occurs when the muscle fibres lengthen under tension. It aids in controlling the extension and ulnar deviation of the wrist.
ISOMETRIC FUNCTION
The isometric function of this muscle involves contracting also generating tension without changing its length. This function helps stabilise the wrist joint during activities that require a static hold or resistance.
RELATED MUSCLE SCIENTIFIC NAMES
There are no directly related muscle scientific names to list under this category for the Flexor Carpi Radialis.
ANTAGONIST MUSCLES
- Extensor Carpi Radialis Longus: Extends and abducts the wrist, opposing the flexion action of the Flexor Carpi Radialis.
- Extensor Carpi Radialis Brevis: Extends and abducts the wrist, counteracting the flexor as well as abductor actions of the Flexor Carpi Radialis.
COMMON INJURIES
- Tendinitis: Inflammation or irritation of the tendon of this muscle, commonly occurring at its insertion point or along the course of the tendon, resulting in pain and limited wrist movement.
- Repetitive Strain Injuries: Overuse injuries resulting from repetitive wrist flexion and abduction movements, leading to strain or irritation of the muscle or tendon, causing pain as well as reduced function.
EXERCISES
- Wrist curls: Hold a dumbbell with the palm facing upward, also curl the wrist towards the forearm to strengthen the Flexor Carpi Radialis. Enhances wrist flexion strength.
- Wrist flexion exercises with dumbbells or resistance bands: Use a dumbbell or resistance band to perform wrist flexion movements, targeting the Flexor Carpi Radialis and improving wrist stability.
- Wrist abduction exercises: Hold a dumbbell with the thumb facing up also move the wrist away from the body, engaging the Flexor Carpi Radialis for wrist abduction.
- Hammer curls: Hold a dumbbell with the thumb facing up and curl the weight towards the shoulder, engaging both the Flexor Carpi Radialis and the brachioradialis for overall forearm strength.
- Wrist flexion with pronation exercises: Hold a dumbbell with the palm facing down and curl the wrist towards the forearm while maintaining pronation, targeting the Flexor Carpi Radialis.
STRETCHES
- Wrist flexor stretch: Extend the arm forward, palm up, and gently pull the fingers back with the other hand to stretch the wrist flexors, including the Flexor Carpi Radialis.
- Forearm pronation and supination stretch: Rotate the forearm from palm-up to palm-down and vice versa, using the other hand to assist and stretch the forearm muscles.
- Wrist extensor stretch: Extend the arm with the palm facing down as well as gently pull the fingers back with the other hand to stretch the wrist extensors and this muscle.
- Wrist and forearm stretch with fingers interlaced: Interlace the fingers, extend the arms, and gently press the palms outward to stretch the wrist and forearm muscles.
- Wall-assisted wrist flexor stretch: Place the palm against a wall with the fingers pointing down as well as gently press to stretch the wrist flexors and the Flexor Carpi Radialis.
