Lecture 7: Bones And Joints Of Upper Extermity Flashcards
Name the grooves lateral to the dorsal tubercle on radius and what they attach
- Area for extensor pollicis brevis and abductor pollicis longus
- Groove for Extensor carpi radialis longus and brevis
Name tendons of lateral border of anatomic snuffbox
Extensor pollicis brevis and abductor pollicis longus
Another name for dorsal tubercle of distal radius
Lister’s tubercle
What attaches on anterior border of radius
Flexor digitorum superficialis
Attachment on pronator turbercle
Insertion of pronator teres
Location + attachment on radial / bicipital tuberosity
Distal to neck, ant med in anatomical p
Partial insertion of biceps brachii
Name grooves medial to dorsal tubercle
- Groove for extensor pollicis longus
- Groove for extensor digitorum and extensor indicis
Which carpal bones does the distal radius articulate with?
Scaphoid and lunate
Which muscle inserts on olecranon process?
Triceps tendon
Where is the ulnar tuberosity and what attaches there?
Ant surface of ulnar
Insertion of brachialis muscle
Where is the supinator crest and fossa and what attaches there?
Proximal lateral ulna, inferior to radial notch of ulna
Partial origin of supinator
What attaches on posterior border of ulna?
Origin of flexor carpi ulnaris
What does the distal end of the ulna articulates with?
Articular cartilage
Name the floor and lateral border of the anatomic snuffbox
Floor: Scaphoid
Lateral border: tendons of extensor pollicis brevis and abductor pollicis longus
What inserts of scaphoid tubercle?
Partial insertion of flexor retinaculum
What inserts on pisiform?
- Partial insertion of flexor carpi ulnaris
- Partial insertion of flexor retinaculum
Where does the flexor retinaculum inserts?
Scapoid
Pisiform
Hook of Hamate
Trapezium Tubercle
With what does the triquetrum articulate?
Articular cartilage of wrist
With what does the hamate articulate?
4th and 5th metacarpal
Partial insertion of ___________ on ant aspect of Hamate
Flexor carpi ulnaris
What articulates with Capitate?
Base of 3rd metacarpal and partially base of 4th metacarpal
With what does the Trapezoid articulate?
Second metacarpal
Partial insertion of ________ on trapezium tubercle
Flexor retinaculum
What separates distal radioulnar joint from radiocarpal joint?
Trifolar disc
What separates distal radioulnar joint from radiocarpal joint?
Trifolar disc
Location of Trifolar Disc
Ulnar notch to ulnar styloid
Location of trifolar disc
Ulnar styloid to ulnar notch of radius
Carpal bones with partial flexor retinaculum insertions
Scaphoid and trapezium
Pisiform and hamate
Carpal bones with partial flexor carpi ulnaris insertions
Pisiform
Hamate
Carpal bone that articulates with trifolar disc
Triquetrum
Origin of flexor carpi ulnaris
Bony ridge on posterior ulnar
Ligaments and what they limit - Radiohumeral and Ulnohumeral Joints
Capsule
Medial/Ulnar Collateral - limits Valgus motion
Lateral/Radial Collateral - limits Varus motion
Attachments of medial and lateral collateral ligaments of the elbow
Medial Collateral - medial epicondyle to coronoid and olecranon process
Lateral Collateral - lateral epicondyle to annular ligament
Ligaments of proximal RU joint
Capsule: Cont with Radiohumeral and Ulnohumeral joint capsule
Annular: Encircles radial head and ensures correct radial alignment to humerus and ulna
limits lat and inf displacement of radius
Oblique: attaches ulna and radius ant
Limits supination and inf radial displacement
Bursae of elbow
Olecranon subtendonous bursa: between olecranon and triceps tendon
Olecranon subcutaneous bursa
Joint classification of Intermediate RU joint
Fibrous syndesmosis, amphiarthrodial joint
Fibre direction of interosseous membrane of intermediate RU joint
Superior lateral to infero medial (R-U)
Ligaments of distal RU joint
Capsule: enclosed joint, superior deficiency
Ant and post radioulnar ligaments - transverse, distal radius to distal ulnar
Ant restricts supination
Post restricts pronation
Trifolar disc: ulnar process on radius to styloid process of ulna
Limits impact between radius ulna and carpals
Ligaments of radiocarpal joint
Capsule: Radius, ulna, proximal carpals
Ulnar collateral: ulnar styloid to triquetrum
Radial collateral: radial styloid, scaphoid, trapezium, first metacarpal
Ant radiocarpal ligaments:
Long and short radiolunate
Radioscaphocapitate
Radiotriquetral
Post radiocarpal
Radius&Radial styloid to Triquetrum and Lunate
Ant Ulnocarp Lig:
Ulnotriquetral
Ulnocapitate
Ulnolunate
Post Ulnocarpal Ligt
Distal Ulna&Trifolar cart - Triquetrum and Lunate
Name components of palmar radiocarpal ligt and functions
Short radiolunate
Long radiolunate
Radioscaphocapitate
Radiotriquetral
Function: limits writs extension
Hand to follow radius in supination
Name components of dorsal radiocarpal ligament and function
1 ligament
Dist radius&radial styloid - lunate and triquetrum
Limits wrist flexion
Hand to follow radius in pronation
Name 3 bands of palmar ulnocarpal ligt and function
Ulnotriquetral
Ulnolunate
Ulnocapitate
Limits extension and controls carpal motion
Classification of wrist joint
Biaxial condyloid synovial joint
Ligaments of intercarpal joint
- Capsule - separate from radiocarpal joint capsule
- Ant radiocarpal ligt
3.Post radiocarpal ligt
- Medial collateral
- Lateral collateral
- Interosseus
Classification of intercarpal joints
Nonaxial plane synovial
Ligaments of 1st CMC joint
1.Capsule - separate from 2-5
- Lateral collateral - lat trapezium to base of 1st MC
Restrict adduction - Ant CMC ligament - ant surfaces of adjacent bones
Limits extension - Post CMC ligament - post surfaces of adjacent bones
Limits hyperflexion - Interosseus ligaments - between adjacent bones
Limits joint distractions
Ligaments of 2-5 CMC joints
Capsule
Ant & Post CMC ligaments
Interosseus ligaments
Classification of intermetacarpal joint
Nonaxial plane synovial
Ligaments of MCP Joint
1.Capsule
- Deep transverse MC ligament - ant surfaces 2-5 MC’s
- Lateral collateral - fuse with ant capsule
Holds volar plate on joint
Limits stresses varus - Medial collateral - fuse with ant capsule
Holds volar plate on joint
Limits stresses - valgus - Volar fibrocartilagenous plate / palmar ligament
Thick dense plate located anterior to joint
Blends with deep transverse MC proximally
Function: limits hyperextension, prevents impingement of flexor tendons, reinforces capsule
Ligaments of PIP and DIP
Capsule
Lateral and medial collateral
Volar plate / palmar ligament
