Mod exam 3 review wrist.hand .docx

Wrist joint is made up of two joints-radiocarpal and midcarpal. Anatomy review of joints. Radiocarpal- synovial joint Made of the distal radius and radioulnar disk (articular cartilage between radius and ulna) proximally. Made of scaphoid, lunate, triquetrum distally. Extension and flexion (Sagittal...

Wrist joint is made up of two joints-radiocarpal and midcarpal. Anatomy review of joints. Radiocarpal- synovial joint Made of the distal radius and radioulnar disk (articular cartilage between radius and ulna) proximally. Made of scaphoid, lunate, triquetrum distally. Extension and flexion (Sagittal plane, frontal axis) Radial and Ulnar deviation (Frontal plane, sagittal axis) Classified as a Biaxial Condyloid Midcarpal (intercarpal) joint-Nonaxial Between two rows or carpal bones Ligaments Radial collateral-attaches to radial styloid and trapezium and scaphoid. Provides lateral support. Ulnar collateral-attached to ulnar styloid and pisiform and triquetrum. Provides medial support. Palmar radiocarpal-Limits wrist extension; attaches to the anterior ulna and radius and to the anterior surface of the proximal carpals. Dorsal radiocarpal-Limits wrist flexion; attaches from posterior surface of the distal radius to posterior scaphoid, lunate, and triquetrum. Palmar Fascia (palmar aponeurosis)- Superficial triangular fascia on palm of hand. Attachment for the palmaris longus and flexor retinaculum.