Tendon and Ligament Flashcards
(27 cards)
what must be considered in tendon loading?
muscle contraction force and relative cross sectional area of muscle to tendon
how does tendon loading differ from other connective tissues?
due to its direct attachment to skeletal muscles
which is stronger: muscle force or tendon tensile strength
tendon tensile strength tends to be twice that of its muscle
what is more common: muscle rupture or tendon rupture?
muscle rupture since tendon tensile strength is stronger
tendon loading is typically what percentage ultimate stress?
5-10%
what is a myotendinous junction?
the junction between tendon and muscle
what are some consequences of increased tissue stiffness in dense connective tissue surrounding muscle?
rapid, eccentric loading can be problematic
posture- aging and sitting behaviors self-perpetuating
if a football quarterback plants his back foot down in the ground what can this lead to due to stiff DCT?
dorsiflexion tension load achilles leading to a tear
very common in males age 33-55
if a heavy box falls off the shelf and you rush to catch it what can this lead to due to stiff DCT?
heavy rapid eccentric load biceps rupture bc tension loaded
cellular reaction takes place in what phase of healing?
inflammatory (1-7 days)
collagen synthesis takes place in what phase of healing?
proliferation (7 days to 7 weeks)
remodeling takes place in what phase of healing?
maturation (7 weeks to months)
does immobilization in tendon increase or decrease water content, PG/GAG content and strength?
reduce
immobilization weakens bone ligament bone complex after how many weeks in ACL?
8 weeks
what is pronounced in the first 1-2 weeks with immobilization
tendon softening
what is it important to remember in regards to tendon softening in immobilization?
patients maybe feeling better but they are very vulnerable
where do muscle tendon injuries due to stretching or combined stretching and contraction tend to occur at?
myotendinous junction (MTJ)
which is more common in adults: midsubstance tears of bone-lig-bone or avulsion
midsubstance tears of bone-lig-bone
pre-epiphyseal closures are failure at…
epiphysis
post-epiphysis closures are failure at..
MTJ
when doe pre epiphyseal closures usually occur?
in your growing years
what are the parameters for strength?
3-5 sets 6-12 reps
what are the parameters for muscular endurance?
3-5 sets 20-30 reps
what are the parameters for tendon?
3-5 sets of 30-40 reps
