Retinaculum

A retinaculum (plural retinacula) is a band of thickened deep fascia around tendons that holds them in place.[1] It is not part of any muscle. Its function is mostly to stabilize a tendon. The term retinaculum is New Latin,[2] derived from the Latin verb retinere (to retain). Specific retinacula include:

• In the wrist:
  • Flexor retinaculum of the hand
  • Extensor retinaculum of the hand
• In the ankle:
  • Flexor retinaculum of foot
  • Superior extensor retinaculum of foot
  • Inferior extensor retinaculum of foot
  • Superior fibular retinaculum
  • Inferior fibular retinaculum
• In the knee:
  • Lateral retinaculum
  • Medial patellar retinaculum

References

1. "UAMS Department of Neurobiology and Developmental Sciences - Fascia and Membrane Tables". anatomy.uams.edu. Retrieved 2019-04-13.
2. http://www.merriam-webster.com/dictionary/retinaculum