Chap 9 Flashcards
what is a load
external force or forces acting on internal tissue
stiffness
ability of a tissue to resist a load
stress
internal resistance to an external load
strain
extent of deformation of tissue under load
deformation
change in shape of a tissue
elasticity
property that allows a tissue to return to normal following deformation
plastic
deformation of tissue that exists after the load is removed
yield point
elastic limit of tissue
creep
deformation of tissues that occurs with application of a constant load over time
mechanical failure
exceeding the ability to withstand stress and strain, causing tissue to break down
trauma
a physical injury or wound caused by external or internal force
ex: mm strain, contusion, ligt sprain, dislocation, subluxation, bone fracture, neuroplaxia
compression
produced by external loads applied toward one another on opposite surfaces in opposite directions
tension
force that pulls or stretches tissue and is generated in response to equal and opposite external loads that pull a structure apart
shearing
equal but not directly opposite loads are applied to opposing surfaces forcing those surfaces to move in parallel directions relative to one another
bending
when two force pairs act at opposite ends of a structure
OR
when free forces cause bending or when already bowed structure is axially loaded
torsion
twisting in opposite directions from the opposite ends of a structure cause shear stress over the entire cross section of that structure
overuse
repetitive dynamics white are traumatic over time
ex: mm cramp, mm soreness, tendinitis/osis, mftp, bursitis, capsulitis, stress fracture, neuritis
muscle strain
a stretch, tear, rup in the muscle or its tendon
muscle cramp
involuntary muscle contraction
muscle guarding
muscle contraction in response to pain
clonic
involuntary muscle contraction characterized by alternate contraction and relaxation in rapid succession
tonic
type of muscle contraction characterized by constant contraction that lasts for a period of time
acute onset muscle soreness
accompanies fatigue, and is transient muscle pain experiences immediately after exercise
tendinitis
inflammation of a tendon
tendinosis
breakdown of a tendon without inflammation
tenosynovitis
inflammation of tendon and its synovial sheath
when does tendinitis become tendinosis
if repetitive overuse continues and the inflamemd or irritated tendon fails to head the tendon begins to degenerate the primary concern shifts from tendon inflammation to degeneration
myofascial trigger point
a discreet, hypersensitive nodule within a taut band of skeletal muscle or fascia
contusion
compression of soft tissue that results in bleeding into surrounding tissues
aka a bruise
eccymosis
bluish-purple discoloration of the skin
aka bruise