Chapter 8: ROM And Flexibility Flashcards
Define flexibility:
Ability to move a joint or series of joints through a full, non restricted pain free ROM
Flexibility is dependent on a combination of the following:
- Joint ROM
2. Muscle flexibility
What structures are most often responsible for limiting ROM?
Muscles, tendons, surrounding fascial sheaths
In what types of situations do ligaments and jt capsules lose some elasticity and shorten?
- long periods of immobilization
- after surgical repair of an unstable joint
- long periods of inactivity
Name different structures that can restrict ROM:
- connective tissue
- bony structure
- fat
- skin
- neural tissue tightness
What factors that limit flexibility cannot be altered?
- bone structure
- age
- gender
AROM aka
Dynamic flexibility
AROM applies to the ability to move a joint _____ with little _____ to motion.
- efficiently
- resistance
PROM aka
Static flexibility
If muscle does not have enough elasticity to compensate for the additional stretch associated with PROM, it is likely that the ____ ____ will be injured.
Musculotendinous unit
The goal of any effective stretching program should be to improve the ____ at a given articulation by altering the ______ of the ______ units that produce movement at the joint.
- ROM
- extensibility
- neuromusculotendinous
2 mechanoreceptors in stretch reflex:
- muscle spindle
- golgi tendon organ (GTO)
Muscle spindle is sensitive to changes in…
Muscle length
GTO is sensitive to changes in…
- muscle length
- muscle tension
Both muscle and tendon are composed largely of _____ _____ and _____ _____.
- noncontractile collagen
- elastin fibres
Collagen enables tissue to resist _______ forces and ______.
- mechanical
- deformation
Elastin composes ____ ____ tissues that assist in recovery from ______.
- highly elastic
- deformation
What are the 3 mechanical properties of collagen, and how does it help in withstanding high tensile stress?
- elasticity: capability to recover to normal length after elongation
- viscoelasticity: allows for slow return to normal length and shape after deformation
- plasticity: allows for permanent change or deformation
What are the 3 physical properties of collagen, and how does it help in withstanding high tensile stress?
- force-relaxation: decrease amount of force needed to maintain tissue at a set amount of displacement or deformation over time
- creep response: ability of a tissue to deform over time while a constant load is imposed
- hysteresis: amount of relaxation a tissue has undergone during deformation and displacement.
What happens if the mechanical and physical limitations of connective tissue are exceeded?
Injury
What are the 2 active contractile components that are in muscle but not tendons?
- actin myofilaments
- myosin myofilaments
What are the 2 factors that influence the % of contribution from contractile and non contractile components for flexibility?
- degree to which the muscle is stretched or deformed
- velocity of deformation
Non-contractile elements are primarily resistant to ….
The degree of lengthening
Contractile elements are resistant to …
High-velocity deformation
The greater the stretch, the more ______ components contribute.
Non contractile
Lengthening of a muscle via stretching allows for ______ and _____ changes to occur in the collagen and elastin fibres.
- viscoelastic
- plastic
The greater the velocity of deformation, the greater the chance for….
Exceeding the tissue’s capability to undergo viscoelastic and plastic change
Joint hypomobility ethology can often be traced back to:
- faulty posture
- muscular imbalances
- abnormal neuromuscular control
Muscle tightness and hypertonicity have a significant impact on _____ _____.
Neuromuscular control
How can muscle tightness cause reciprocal inhibition?
Increase muscle spindle activity in a specific muscle will cause decreased neural drive to that muscle’s functional antagonist.