SDF and DDF tendons run through which structure?

SDF and DDF tendons run through which structure?

• A. Carpal canal
• B. Carpal tunnel
• C. Flexor sheath
• D. Digital sheath

Answer: (A)

The key idea is the path of the forelimb flexor tendons at the carpus. The superficial digital flexor tendon and the deep digital flexor tendon pass through a tunnel formed by the carpal bones and the overlying flexor retinaculum. This space is called the carpal canal, and it serves as the proximal passageway for these tendons as they move toward the digits. After they exit this canal, they enter the distal flexor tendon sheath around the digits (the digital sheath). In humans that same space is often called the carpal tunnel, but in veterinary contexts the term carpal canal is used. The flexor sheath and digital sheath describe the tendon coverings closer to and along the digits, not the proximal carpal passage through the carpal canal.

The key idea is the path of the forelimb flexor tendons at the carpus. The superficial digital flexor tendon and the deep digital flexor tendon pass through a tunnel formed by the carpal bones and the overlying flexor retinaculum. This space is called the carpal canal, and it serves as the proximal passageway for these tendons as they move toward the digits. After they exit this canal, they enter the distal flexor tendon sheath around the digits (the digital sheath). In humans that same space is often called the carpal tunnel, but in veterinary contexts the term carpal canal is used. The flexor sheath and digital sheath describe the tendon coverings closer to and along the digits, not the proximal carpal passage through the carpal canal.