mod 2- stability/reducing risk

Question 1

what causes spine instability

Answer 1

• joint instability is a function of tissue damge
• lost mechanical integrity results in stiffness loss + increased risk of unstable behaviour
• instability can both be the cause and result of injury

Question 2

what is key in stability

Answer 2

balance between the ‘cables’ (muscles)

Question 3

what do u want to minimize for stability

Answer 3

potential energy

Question 4

how much MVC is nessesary to produce joint stiffness and is strength or endurance more important

Answer 4

10% (fualty motor system if there are improper magnitudes)

-endurance

Question 5

why should you have a neutral spine

Answer 5

1. pars lumborum muscles can protect against ant sheer
2. no tension in interspinous lig
3. ligs in general not under strain
4. not likely to herniate disk
5. can handle compressive loads better

Question 6

when pulling or pushing what should u keep in mind

Answer 6

allways do it in line with the lumbar spine so less torque or compression

Question 7

should intra abdominal pressure be increased when lifting

Answer 7

we do naturally already so dont need to (could raise BP tho)

Question 8

Known mechanical changes associated w seated long (4)

Answer 8

1. increase intra disk pressue
2. increase post annulus strain
3. creep decreases stiffness
4. post migration of nucleas reduces mechanical advantage of extensor musculature

Question 9

how long should u sit for and what should be teh sit:stand

Answer 9

20-30

1:1

Question 10

should the trunk musculature be co-contracted to stabilize the spine

Answer 10

yes but it has a compressive pentaly

only should 10% MVC

Question 11

what does the research say about back belts (%)

Answer 11

1. dont provide protective benifit unless use injured ur back previously
2. Those injured w belt have more serious injuries
3. belts give ppl preception and ability to lift more
4. increase IAP + BP
5. changes lifting styles

Question 12

what should u be screened for prior to getting an exercise belt

Answer 12

BP/HR

full ergonomic assessment

Question 13

how long should belts be worn for

Answer 13

not long time periods

Question 14

why do people get bad backs

Answer 14

• ppl develop bad backs b/c movement flaws (limping after sprained ankle)
• movement flaws cause repeated or prolonged loading that is abnormal for the tissue which slowly becomes painful and hypersensitized

Question 15

should rehab of the back be like exremities

Answer 15

extremities work best w mobility however loading back thru ROM can lead to back paom

Question 16

3 things to keep in mind when training for lowback health

Answer 16

1. motor control perfection
2. maintain sufficient spine stability
3. muscle endurance

Question 17

how rapid is lbp improvement

Answer 17

healing occurs slowly (days to months)

-important for patients to be aware of this

Question 18

what do u want to see about exercise progression

Answer 18

want to see positive slope of improvement, if not remove ex