PS 1001:03 Lecture Notes - Lecture 19: Palmar Radiocarpal Ligament, Ulnar Styloid Process, Radial Styloid Process
Understand and describe the function of the wrist
Understand the articulations, ligaments and muscles
Understand and describe the functions of the muscles
Wrist made up of many joints, NOT a single joint
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Joint
Ligaments
Radio-
carpal
Type: synovial, ellipsoid -> moves in 2 directions
-
Articular disc
-
Capsular ligaments
L1 - the wrist complex
Monday, 30 April 2018
8:53 AM
week 10 Page 1
carpal
joint
Stabilises distal RU joint
-
Cushions between ulna and carpus -> helps with loading
pressure through wrist
-
Allows axial loading of ulna aspect of forearm
-
Articular surface of carpus
-
Stabilises ulna side of carpus
-
Articular disc
-
Ulnar styloid process
-
Radial styloid process
-
Dorsal tubercle
-
Intra-articular disc makes joint more congruent
-
Bony points
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Dorsal
Dorsal radiocarpal ligament
Posterior edge of lower end of radius to posterior
surface of scaphoid, lunate and triquetral
-
Fibres run inferiorly and medially
-
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Flexion -> ligaments taut
Palmar
ligaments
(on
palmar
aspect)
Fibres run inferiorly and slightly medially from
anteior edge of radius and radial styloid, to
proximal row of carpus anteriorly
-
Palmar radiocarpal ligament
Fibres run inferiorly and laterally from ulnar
styloid and articular disc, to proximal row of
carpals anteriorly
-
Palmar ulnocarpal ligament
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Extension -> ligaments taut
Radial
collateral
carpal
ligament
Radial styloid to lateral side of scaphoid and
trapezium
-
week 10 Page 2
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Ulnar
collateral
carpal
ligament
Rounded cord form ulnar styloid to base of
pisiform and medial/posterior surface of triquetral
below
-
Blends with carpal tunnel
-
Distal
radio-
ulnar
joint
Articulation between head of ulna and ulnar notch of radius
-
Articular disc - triangular, fibrocartilaginous, unites radius and ulna
-
Loose, weak fibrous capsule
-
Pronation and supination - Rotation of lower end of radius
around head of ulna
•
Movements
-
Mid-
carpal
Proximal and distal carpal bones
-
Lateral - trapzium/trapezoid with scaphoid
-
Central - capitate with scaphoid/lunate
-
Medial - hamate with triquetal
-
Palmar and dorsal
•
Intercarpal
-
Radial (scaphoid - trapezium)
•
Ulnar (triquetral - hamate)
•
Collateral
-
Capitate - scaphoid
•
Interosseous
-
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Carpome
tacarpal
joints
(CMC)
week 10 Page 3
Document Summary
Understand and describe the function of the wrist. Understand and describe the functions of the muscles. Wrist made up of many joints, not a single joint. Type: synovial, ellipsoid -> moves in 2 directions. Capsular ligaments week 10 page 1 carpal joint. Cushions between ulna and carpus -> helps with loading pressure through wrist. Allows axial loading of ulna aspect of forearm. Posterior edge of lower end of radius to posterior surface of scaphoid, lunate and triquetral. Fibres run inferiorly and slightly medially from anteior edge of radius and radial styloid, to proximal row of carpus anteriorly. Fibres run inferiorly and laterally from ulnar styloid and articular disc, to proximal row of carpals anteriorly. Radial styloid to lateral side of scaphoid and trapezium. Radial collateral carpal ligament week 10 page 2. Rounded cord form ulnar styloid to base of pisiform and medial/posterior surface of triquetral below. Articulation between head of ulna and ulnar notch of radius.
