GENERAL INFORMATION
The flexor digiti minimi brevis is a muscle located in the hand that plays a role in flexing the little finger. It is responsible for bending the little finger at the metacarpophalangeal joint and assisting in gripping actions.
ORIGIN
This muscle originates from the hook of the hamate bone, which is a small bone located on the palm side of the wrist.
INSERTION POINT
The flexor digiti minimi brevis inserts onto the ulnar side of the base of the proximal phalanx of the little finger. It attaches near the metacarpophalangeal joint of the little finger.
MAJOR ARTERIES
It receives its blood supply from branches of the ulnar artery, which provide oxygenated blood to the muscle for its proper function.
NEURAL INNERVATION
The flexor digiti minimi brevis is innervated by the deep branch of the ulnar nerve. This nerve arises from the brachial plexus and provides both sensory and motor innervation to the muscle.
TRIGGER POINT
Trigger points in this muscle may develop due to muscle tension, overuse, or injury. These trigger points may cause localised pain, tenderness, or referred pain in the palm or along the ulnar side of the hand.
CONCENTRIC FUNCTION
The concentric function of the flexor digiti minimi brevis involves the contraction of the muscle fibres, resulting in the flexion of the little finger at the metacarpophalangeal joint. This contraction allows for actions such as gripping and grasping objects with the little finger.
ECCENTRIC FUNCTION
The eccentric function of this muscle occurs when the muscle fibres lengthen under tension. This function assists in controlled relaxation and extension of the little finger.
ISOMETRIC FUNCTION
The isometric function of this muscle involves contracting and generating tension without changing the length of the muscle. This function helps maintain stability and support in the little finger during gripping actions.
RELATED MUSCLE-SCIENTIFIC NAMES
The flexor digiti minimi brevis is also known by its scientific name:
- Flexor minimi digiti manus: This muscle is essential for the flexion of the little finger, aiding in movements such as gripping and grasping.
ANTAGONIST MUSCLES
The antagonist muscles to the flexor digiti minimi brevis include the extensor muscles of the hand and fingers. These muscles work in opposition to the flexor digiti minimi brevis, allowing for coordinated movements of the hand and fingers.
COMMON INJURIES
Common injuries associated with the flexor digiti minimi brevis may include:
- Strain or sprain: Overexertion or sudden traumatic events can lead to strain or sprain in it.
- Tendinitis: Inflammation or irritation of the tendons of this muscle due to repetitive use or strain.
EXERCISES
Exercises that target and strengthen the flexor digiti minimi brevis include:
- Finger curls: Hold a small object, such as a softball, in the palm and curl the fingers, focusing on the flexion of the little finger.
- Gripping exercises: Squeeze a stress ball or grip-strengthening tool, emphasising the activation of the little finger.
- Hand grip strengthening exercises: Perform exercises that target the overall grip strength of the hand, indirectly strengthening the muscle.
STRETCHES
Stretching the flexor digiti minimi brevis can help improve flexibility and prevent stiffness. Some stretches that target this muscle include:
- Little finger stretch: Gently pull the little finger towards the palm using the opposite hand, feeling a stretch along the ulnar side of the hand.
- Hand and finger stretches: Perform stretches that target the flexibility and mobility of the hand and fingers, including the little finger.
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.