O's and I's Upper Extremity Part 2 Flashcards
Flexor Digitorum Superficialis Origin
- Humeral-Ulnar Head: Medial Epicondyle via the Common Flexor Tendon
- Radial Head: Oblique Line of Radius
Flexor Digitorum Superficialis Insertion
Splits to both sides of the base of each Middle Phalanx of the 4 Fingers
Flexor Digitorum Superficialis Action
- Flexes the Proximal and Middle IP Joints
2. Flexes the Wrist if Fingers are Extended
Flexor Digitorum Superficialis Nerve
Median
Flexor Digitorum Profundus Origin
Anterior and Medial Surface of Proximal 3/4 Ulna
Flexor Digitorum Profundus Insertion
Distal Phalanx of Medial 4 Digits (through FDS tunnel)
Flexor Digitorum Profundus Action
- Flexes the Distal IP Joints and in so doing Flexes the Proximal and Middle IP Joints
- Flexes the Wrist if Fingers are Extended
Flexor Digitorum Profundus Nerve
Medial Portion: Ulnar
Lateral Portion: Median
Flexor Pollicis Longus Origin
Middle of Anterior Radius and Interosseus Membrane (sometime as high as the Coronoid Process of Ulna)
Flexor Pollicis Longus Insertion
Palmar Aspect of Base of the Distal Phalanx of Thumb
Flexor Pollicis Longus Action
- Flexes the Distal Phalanx of Thumb
2. Flexes the other joints to the Wrist (MCP, CMC)
Flexor Pollicis Longus Nerve
Median
Pronator Quadratus Origin
Distal 1/4 Anteromedial Surface of Ulna
Pronator Quadratus Insertion
Distal 1/4 Anterolateral Surface of Radius
Pronator Quadratus Action
Pronates the Forearm and Hand
Pronator Quadratus Nerve
Median
Brachioradialis Origin
Lateral Supracondylar Ridge of Humerus
Brachioradialis Insertion
- Styloid Process of Radius
2. Lateral Side of Distal 1/3 of Radius
Brachioradialis Action
- Flexes the Elbow
- Pronates the Forearm when Supinated
- Supinates the Forearm when Pronated
Brachioradialis Nerve
Radial
Extensor Carpi Radialis Longus Origin
Lower Lateral Supracondylar Ridge (below Brachioradialis)
Extensor Carpi Radialis Longus Insertion
Base of 2nd Metacarpal (dorsum)
Extensor Carpi Radialis Longus Action
- Extends the Wrist
- Radially Deviates Wrist
- Weakly Flexes the Elbow
- Weakly Supinates the Forearm
Extensor Carpi Radialis Longus Nerve
Radial
Extensor Carpi Radialis Brevis Origin
Lateral Epicondyle via the Common Extensor Tendon
Extensor Carpi Radialis Brevis Insertion
Base of 3rd Metacarpal (dorsum)
Extensor Carpi Radialis Brevis Action
- Extends Wrist
2. Radially Deviates Wrist
Extensor Carpi Radialis Brevis Nerve
Radial
Extensor Carpi Ulnaris Origin
Lateral Epicondyle via the Common Extensor Tendon
Extensor Carpi Ulnaris Insertion
Medial Side of Base of the 5th Metacarpal
Extensor Carpi Ulnaris Action
- Extends Wrist
2. Ulnarly Deviates Wrist
Extensor Carpi Ulnaris Nerve
Radial
Extensor Digitorum Origin
Lateral Epicondyle via the Common Extensor Tendon
Extensor Digitorum Insertion
Base of Middle Phalanx of the Four Fingers (central band) and Base of Distal Phalanx (lateral bands)
Extensor Digitorum Action
- Extends 4 Medial Digits
- Extends Wrist (if fingers are flexed)
- Abducts the Digits (during extension)
Extensor Digitorum Nerve
Radial
Extensor Digiti Minimi Origin
- Lateral Epicondyle via the Common Extensor Tendon
2. Ulnar Aspect of Extensor Digitorum
Extensor Digiti Minimi Insertion
Base of Middle Phalanx of the 5th Finger (central band) and Base of Distal Phalanx (lateral bands)
Extensor Digiti Minimi Action
- Extends the 5th Digit
2. Abducts the 5th Digit
Extensor Digiti Minimi Nerve
Radial
Extensor Indicis Origin
- Posterior Surface of Ulna
2. Interosseus Membrane