GENERAL INFORMATION
The hand palmaris brevis muscle is a small muscle located in the palm. It is also involved in the movements of the skin and soft tissues of the palm.
ORIGIN
This muscle originates from the palmar aponeurosis, which is a broad, flat tendon located in the palm.
INSERTION POINT
This muscle inserts onto the skin of the medial (ulnar) side of the palm, near the base of the little finger.
MAJOR ARTERIES
The hand palmaris brevis muscle receives its blood supply from branches of the ulnar artery, such as the superficial palmar arch. These arteries provide oxygenated blood to the muscle for its proper function.
NEURAL INNERVATION
The superficial branch of the ulnar nerve innervates this muscle. The ulnar nerve arises from the brachial plexus and provides sensory as well as motor innervation to the muscle.
TRIGGER POINT
Trigger points in this muscle may develop due to muscle tension or overuse. These trigger points can cause localised pain or tenderness in the palm.
CONCENTRIC FUNCTION
The concentric function of this muscle involves the contraction of the muscle fibres, resulting in the compression and tightening of the skin and soft tissues of the palm. This contraction aids in grasping as well as gripping actions.
ECCENTRIC FUNCTION
The eccentric function of the hand palmaris brevis muscle occurs when the muscle fibres lengthen under tension. This function allows for controlled relaxation and expansion of the skin as well as the soft tissues of the palm.
ISOMETRIC FUNCTION
The isometric function of this muscle involves contracting and generating tension without changing the length of the muscle. This function aids in stabilising the palm during activities that require a static hold or resistance.
RELATED MUSCLE SCIENTIFIC NAMES
The hand palmaris brevis muscle is also known by its scientific name:
- Musculus palmaris brevis: This muscle plays a key role in the movement and stabilisation of the skin and soft tissues of the palm.
ANTAGONIST MUSCLES
The antagonist muscles to this muscle include the extensor muscles located on the dorsal side of the hand. These muscles work in opposition to the Palmaris Brevis muscle, allowing for coordinated movements of the hand and fingers.
COMMON INJURIES
Common injuries associated with the hand palmaris brevis muscle may include:
- Strain or sprain: Overexertion or sudden traumatic events can lead to strain or sprain in the hand palmaris brevis muscle.
- Tendinitis: Inflammation or irritation of the tendon of the hand palmaris brevis muscle due to repetitive use or strain.
EXERCISES
Exercises that target and strengthen the hand palmaris brevis muscle include:
- Hand squeezing exercises: Squeeze a stress ball or hand gripper to strengthen the muscle.
- Palm resistance exercises: Press the palms together and apply resistance to engage the muscles.
- Finger adduction exercises: Bring the fingers together against resistance to target the hand palmaris brevis.
STRETCHES
Stretching the hand palmaris brevis muscle can help improve flexibility and prevent stiffness. Some stretches that target this muscle include:
- Palm stretching exercises: Spread the fingers wide and stretch the palm.
- Finger extension stretch: Extend the fingers backwards gently with the opposite hand.
- Wrist flexion stretches: Flex the wrist while keeping the fingers straight to stretch the muscles in the palm and hand.
It’s important to note that before starting any exercise or stretching routine, it is advisable to consult with a healthcare professional or a certified hand therapist to ensure proper technique and to prevent any potential injuries.