The flexor tendons are secured in place by a series of pulleys which are fibrous bands wrapping over the tendons and attaching to the bone.
- Annular pulleys: which wrap transversely over the tendons. Numbered A1 – A4 (proximal to distal).
- Cruciate pulleys: which are paired and cross diagonally over the tendons.
Numbered C1 – C3. (see below).
The annular pulleys are readily visible with high resolution, high quality equipment. The cruciate pulleys are poorly seen.
Normal Pulley