Chapter 62 - Tendons and Ligaments

Question 1

what is the primary cell type in tendon?

Answer 1

fibroblast

Question 2

what is thr primary proteoglycan in tendon

Answer 2

decorin

aggrecan is also present at regions tendon undergoes compressive loading

Question 3

loading characteristics of tendon

Answer 3

very stong with tensile loads, buckle under compressive loads (think rope)

Question 4

characteristics of non-sheathed tendons

Answer 4

• fail bc of preexisting pathology or trauma
• have greater propensity to heal
• injury occurs at eith musculotendinous junction or the bone-tendon junction

Question 5

characteristics of sheathed tendons

Answer 5

• fail bc of direct trauma - eg a tendon laceration
• early passive motion is key here to prevent adhesions from forming between the tendon and the sheath

Question 6

differentiate tendons fro ligaments

Answer 6

ligaments are shorter and wider
ligaments have ha lower percentage of type I collagen and a higher percentage of proteoglycans and water
tendon fibroblasts are stellate
ligament fibroblasts are rounder in crosssection

Question 7

how do bones connect to tendon

Answer 7

via sharpeys fibers