Wrist Flexor Group

🤖 AI-Generated

Superficial Flexor Group

1. Flexor Carpi Radialis
   • Function: Flexes and abducts the wrist.
   • Origin: Medial epicondyle of the humerus.
   • Insertion: Base of the 2nd and 3rd metacarpals.
2. Flexor Carpi Ulnaris
   • Function: Flexes and adducts the wrist.
   • Origin: Medial epicondyle of the humerus and the olecranon of the ulna.
   • Insertion: Pisiform, hook of the hamate, and the base of the 5th metacarpal.
3. Palmaris Longus (may be absent in some individuals)
   • Function: Flexes the wrist and tenses the palmar aponeurosis.
   • Origin: Medial epicondyle of the humerus.
   • Insertion: Palmar aponeurosis and flexor retinaculum.
4. Flexor Digitorum Superficialis (intermediate layer)
   • Function: Flexes the middle phalanges of fingers 2-5 at the proximal interphalangeal joints and assists in wrist flexion.
   • Origin: Medial epicondyle of the humerus, ulnar collateral ligament, and radius.
   • Insertion: Middle phalanges of fingers 2-5.

Deep Flexor Group

1. Flexor Digitorum Profundus
   • Function: Flexes the distal phalanges of fingers 2-5 at the distal interphalangeal joints.
   • Origin: Upper three-quarters of the ulna and interosseous membrane.
   • Insertion: Base of the distal phalanges of fingers 2-5.
2. Flexor Pollicis Longus
   • Function: Flexes the thumb at the interphalangeal joint.
   • Origin: Anterior surface of the radius and interosseous membrane.
   • Insertion: Base of the distal phalanx of the thumb.
3. Pronator Quadratus
   • Function: Pronates the forearm.
   • Origin: Distal quarter of the anterior ulna.
   • Insertion: Distal quarter of the anterior radius.