Forearm Flashcards
What runs around Lister’s tubercle?
EPL tendon
1 carpal fracture? Risks?
Scaphoid, risks of nonunion/AVN
Which bone articulates with the triangular fibrocartilage complex (TFCC)
triquetrum
Which tendon does the trapezium have a groove for?
FCR
Scaphoid lunate angle average?
47° (range 30°-60°)
Monteggia fracture. Complications?
Proxima ulna fracture characterized by anterior angulation of ulna and anterior dislocation of radial head Complications: Radial nerve/PIN injury. Compartment syndrome
Galeazzi fracture
Distal 1/3 radial shaft fracture with distal RU dx. May be anterior or posterior.
Colles fracture
Distal radial head fracture with dorsal angulation
Frykman classification
I: extraarticular radius II: I+ulnar styloid III: Radiocarpal intraarticular IV: III+ Ulnar stuloid V: Intraarticular distal radioulnar VI: V+ulnar styloid VII: Intraarticular radiocarpal and distal radioulnar VIII: VII+ ulnar styloid
Most common scaphoid fx location? Complications?
Middle/waist followed by proximal pole and distal pole Complications: Osteonecrosis, nonunion, SLAC (scaphoid lunate advance collapse)
Mayfield classification
Perilunate instability I: Scapholunate disruption II: lunocapitate disruption III: Lunotriquetral disruption IV: lunate (peri) dislocation
Dislocation of lunate occurs through?
Space of Poirier
Torus fracture?
Buckle fracture of radius
Greenstick fracture?
concave, cortex intact or buckled.
Are palmar (volar) or dorsal hand ligaments stronger?
palmar
Radiocarpal joint: Superficial ligaments
RSC (RS and RC) long RL UC
Radiocarpal joint: Deep ligaments
short RL UL (help stabilize the DRUL) ulnotriquetral (“”) RSL (ligament of Testut)
Radiocarpal Extrinsic - dorsal
Dorsal RC (superficial and deep bundles)
Contents of the carpal tunnel?
9 tendons: 4 FDS 4 FDP 1 FPL 1 nerve: Median n
Primary fxn of triangular fibrocartilage complex?
Stabilizes the DRUJ
Borders of carpal tunnel?
Roof: transverse carpal ligament (flexor retinaculum) Floor: central carpal bones Medial wall: pisiform and hamate Lateral wall: trapezium and scaphoid
Borders of ulnar tunnel/Guyon’s canal
Floor: TCL Roof: volar carpal ligament Medial wall: pisiform Lateral wall: hook of hamate
Contents of the ulnar tunnel
Ulnar nerve and artery
1 cause of ulnar tunnel nerve compression?
Ganglion cysts
Extensor compartments of the wrist 1-6?
1: APL, EPB 2: ECRL, ECRB 3: EPL 4: EDC/EI 5: EDM 6: ECU