1.

Question 1

What is the strongest part of a flexor tendon

Answer 1

the middle portion due to greater cross linkages

AND the dorsal surface at champers chiasm

Question 2

What is endotendon?

Answer 2

this binds the tendon fascicles together

Question 3

What is epitenon?

Answer 3

this is the synovial membrane that surrounds the tendon and produces synovial fluid

Question 4

What is the effect of immobilisation on a tendon?

Answer 4

reduced strength and elasticity

Question 5

What is the effect of exercise on a tendon?

Answer 5

increased collagen production, increase strength

Question 6

What are the limits to tendon excursion (intrinsic and extrinsic)?

Answer 6

intrinsic: how much the muscle can be shortened
extrinsic:
reduced with contractures, adhesions
increased with exercises, stretching

Question 7

What is the average tendon excursion of FDP?

Answer 7

32mm

Question 8

What is the average tendon excursion of FDS?

Answer 8

24mm

Question 9

What is the effect of pulleys on movement?

Answer 9

they sacrifice force for efficiency

pulleys reduce bowstringing for efficiency but they also reduce force across the joint

Question 10

What are the flexor muscles in each layer?

Answer 10

Deep - PQ, FDP, FPL (ready to punch)
Middle - FDS
Superficial - PT, FCR, PL, FCU (pass, fail, pas, fail)

Question 11

What is campers chiasm?

Answer 11

provides blood supply to the FDP via vincula

Question 12

What is the effect of gapping of a tendon repair?

Answer 12

gapping of only 2-3mm can increase the resistance to tendon gliding, the tendon can be more likely to catch on the pulley edges. this increases risk of rupture