Abbreviations

• Abductor digiti minimi (ADM)
• Abductor pollicis brevis (APB)
• Carpometacarpal (CMC)
• Distal interphalangeal (joint) (DIP)
• Dorsal palmar arch (DPA)
• Extensor digitorum communis (EDC)
• Extensor pollicis longus (EPL)
• Extension, extensor (ext.)
• Flexor digiti minimi (FDM)
• Flexor digitorum profundus (FDP)
• Flexor digitorum superficialis (FDS)
• Flexion, flexor (flex.)
• Flexor pollicis brevis (FPB)
• Flexor pollicis longus (FPL)
• Interosseus membrane (IOM)
• Interphalangeal (joint) (IP)
• Metacarpal (MC)
• Metacarpophalangeal (joint) (MCP)
• Opponens digiti minimi (ODM)
• Opponens pollicis (OP)
• Phalanx (phal.)
• Proximal interphalangeal (joint) (PIP)
• Retinaculum, retinacular (retinac)
• Signal-to-noise ratio (SNR)
• Superficial palmar arch (SPA)
• Volar plate (VP)

Definitions

• For this text, the hand will be defined as beginning at the carpometacarpal joint
• In anatomic position, hand is in supination
  • Thumb points away from body, palm faces forward
• Radial: Toward radius and synonymous with lateral(ly)
• Ulnar: Toward ulna and synonymous with medial(ly)
• Mesial: Toward midline of structure
  • In the hand, for example, 3rd digit is more mesial than 2nd and 4th digits, which are more mesial than 1st and 5th digits

Orientation of Thumb

Metacarpals

Metacarpal Heads

Phalanges

Appearance of Terminal Tufts

Evaluating Joint Width

Imaging Pitfalls

Evaluating Alignment

Nutrient Grooves

Hand Series

PA Oblique View

Lateral View

AP Oblique View