OrthoNet

MCQs-Anatomy 3
of the obturator nerve (during the deep exposure).

- the sciatic nerve is anterior and lateral to the ischial tuberosity (the origin of the hamstrings)

- the femoral triangle - inguinal ligament, pectineus and adductor longus medially, sartorius and iliopsoas laterally

- tendon blood suppy - from vessels in the perimysium, the periosteal insertion, the surrounding tissue via vessels in the paratenon or mesotenon.
- Tendons surrounded by paratenon have been referred to as vascular tendons and those surrounded by a tendon sheath, as avascular tendons.
- In tendons surrounded by a paratenon, vessels enter from many points.
- The vascular pattern of a flexor tendon within a tendon sheath is quite different - here the mesotenons are reduced to vincula.

- so in the flexor tendons - blood supply is probably mostly from mesotenon