Joints of the forearm, wrist and hand Flashcards
What articulates at the distal radioulnar joint?
Head of ulna with ulnar notch of radius. It is covered by a weak and loose fibrous capsule, with a fibrocartilage disc between it and the radiocarpal joint.
What is the interosseous membrane?
A strong fibrous sheet that passes forces from the RADIUS TO THE ULNA. It also increases surface area for attachment of the deep muscles of the forearm.
What are the joints of the wrist and hand?
radiocarpal, intercarpal, midcarpal, carpometacarpal, metacarpophalangeal, interphalangeal.
What articulates at the radiocarpal joint?
Radius and scaphoid, lunate and triquetrum.
Classify the radiocarpal joint. Which movements are permitted?
Synovial Ellipsoid. Flexion/extension, abduction/adduction.
What strengthens the radiocarpal capsule anteriorly and posteriorly?
Palmar and dorsal ligaments. Medial and lateral collateral ligaments are also present.
What is present between the ulna and radiocarpal joint?
Fibrocartilage disc.
Classify the intercarpal joint. What articulates?
Synovial Plane. Carpal bones in the same row. Strong ligaments restrict movement.
Classify the mid carpal joint. What articulates?
Synovial plane. Carpal bones between proximal/distal rows.
Which movements are permitted at the mid-carpal joints?
Flexion extension, abduction adduction.
Classify the carpometacarpal joints. What articulates?
Synovial plane. Base of metacarpals and distal row of carpals.
Which ligaments restrict movement at the carpometacarpal joints?
Palmar/dorsal ligaments.
Classify the 1st carpometacarpal joint. What articulates? Which movements are permitted?
Synovial Saddle. Base of 1st metacarpal and trapezium. Flexion/extension, abduction/adduction, OPPOSITION.
