Upper Limb Flashcards
What are the 12 muscles of the extensor surface of the forearms
Upper Surface
1.Anconeus
2.Supinator
Lateral Side
3.Brachioradialis
4.Extensor Carpi Radialis Longus
5.Extensor Carpi Radialis Brevis
Posterior Surface
6.Extensor Digitorum
7.Digiti Minimi
8.Extensor Carpi Ulnaris
Deep Surface
9. Abductor Pollicis Longus
10.Extensors Pollicis Longus
11.Extensors Pollicis Brevis
12.Extensor Indicis
What is the origin and insertion of Brachioradialis and the nerve supply and blood supply?
Origin: Upper 2/3 Lateral Supracondylar ridge
Insertion: base of the styloid of the radius
Blood Supply: Post. Interosseus Artery from Ulnar Artery
Nerve Supply: Radial Nerve(C5,C6) before post. Interosseus Nerve
Action: Flexion of the Arm & a weak Pronator
What is the origin and insertion of Extensor Carpi Radialis Longus and the nerve supply and blood supply?
Origin: Lower 3rd of the Lateral Supracondylar Ridge
Insertion:Base of the 2nd Matacarpal
Blood Supply: Post. Interosseas Artery from Ulnar Artery
Nerve Supply:Radial Nerve(C5,C6) before post. Interosseus nerve
Action:Extensor And Abductor of the wrist and mid-carpal joints. Assists in the flexion of the elbow.
What are the 4 Muscles of Common Extensor Origin
1.Extensor Carpi Radialis Brevis
2.Extensor Digitorum
3.Extensor Digiti Minimi
4.Extensor Carpi Ulnaris
What is the origin and insertion of Extensor Carpi Radialis Brevis and the nerve supply and blood supply?
Origin: Common Extensor Origin
Insertion: Base of the 3rd Metacarpal
Blood Supply: Posterior Interosseous Artery from Ulnar Artery
Nerve Supply: Posterior Interosseous Nerve(C6,C7) branches in cubital fossa
Action: Wrist Extensors
What is the origin and insertion of Extensor Digitorum and the nerve supply and blood supply?
Origin: Common Extensor Origin
Insertion: Metacarpophalengeal Joint but variable location
Blood Supply: Post. Interosseous Artery
Nerve Supply: Posterior Interosseous Nerve
Action: It is the extensor of the digits and wrist extension
What is the origin and insertion of Extensor Digiti Minimi and the nerve supply and blood supply?
Origin: Common Extensor Origin
Insertion: splits in 2 and wraps around Extensor digitorum
Blood Supply:
Nerve Supply: Post. Interosseous Nerve
Action: Extensor of the little finger
What is the origin and insertion of Extensor Carpi Ulnaris and the nerve supply and blood supply?
Origin: Common Extensor Origin
Insertion: Base of 5th Metacarpal
Blood Supply:
Nerve Supply: Post. Interosseous Nerve
Action: Extensor of the Wristnd with Flexor Carpi Ulnaris causes ulnar flexion of the wrist
What is the origin and insertion of Anconeus and the nerve supply and blood supply?
Origin: Lateral Epicondyle of humerus
Insertion: Lateral Side of Olecranon
Blood Supply: Post. Interosseous Artery
Nerve Supply: Radial nerve
Action: Helps in Pronation
What is the origin and insertion of Supinator and the nerve supply and blood supply?
Origin:
i.deep part: Supinator Crest and Fossa of the Ulna
ii.Superficial Part: Lateral Epicondyle of Humerus and Radial Lateral Ligament and behind the supinator crest
Insertion: Anterior Oblique line of radius
Blood Supply: Posterior Interosseous
Nerve Supply: Posterior Interosseous Nerve
Action: Supinator But remember Biceps is the main supinator
What is the origin and insertion of Abductor Pollicis Longus and the nerve supply and blood supply?
Origin: Oblique Area of Radius And Ulnar And Interosseous membrane
Insertion:
i. Trapezium
ii. Base of 1st Metacarpal+slip for adjoining Abductor Pollicis Brevis
Blood Supply:
Nerve Supply: Posterior Interosseous Nerve
Action:Abduction of the thumb but also flexion of the wrist
What is the origin and insertion of Extensor Pollicis Brevis and the nerve supply and blood supply?
Origin: At the Radius and Ulnar And Interosseous membrane below Abductor pollicis longus
Insertion: radial border of the snuffbox and into the dorsal surface of the first metacarpal and base of proximal phalanx
Blood Supply:
Nerve Supply:Posterior interosseous nerve
Action:
What is the origin and insertion of Extensor Pollicis Longus and the nerve supply and blood supply?
Origin: Ulnar distal to the Abductor Pollicis Longus
Insertion: terminal phalnyx of the thumb
Blood Supply: Posterior Interosseous Artery then Anterior Interosseous Artery
Nerve Supply:
Action:
What is the origin and insertion of Extensor Indices and the nerve supply and blood supply?
Origin:
Insertion: dorsal expension of the index finger
Blood Supply:
Nerve Supply: Post. Interosseous nerve
Action: Extends the index finger
What are the boundaries of the anatomical snuffbox
Ulnar(medial) side:Extensor Pollicis Longus
Radial(lateral) side: Extensor Pollicis Brevis and Abductor Pollicis Longus
Proximal Border: Styloid process of the radius
Contents:
Cephalic vein, Radial Artery, Radial Styloid, Superficial Branch of the radial nerve, Base of 1st Metacarpal, Scaphoid and Trapezium