midterm theory exam Flashcards
_______ are composed of flexible, non-contractile connective tissue
ligaments
________ limit and control the ROM at the joint while still allowing movements to occur
ligaments
name the cause of a sprain
sudden twist/wrench of a joint beyond its normal range
contributing factors to sprains
congenital ligamentous laxity
previous sprains
altered biomechanics causing stress on ligament/joint
connective tissue pathologies
grade 1 (mild or first degree sprain)
MINOR stretch/tear to ligament
NO instability on PR testing
CAN CONTINUE w/ activity with some discomfort
grade 2 (moderate or second degree sprain)
TEARING of ligament
SNAPPING sound @ time of injury & joint gives way
joint HYPERMOBILE yet stable on PR testing
difficulty continuing activity due to px
grade 3 (severe or third degree sprain)
- COMPLETE RUPTURE/AVULSION of ligament
- SNAPPING sound @ time of injury & joint gives way
- instability w/ no end point on PR testing
- person cannot continue activity due to instability & px
- px is present in acute stage and hypermobile in direction the ligament is meaning to test in chronic phase
- palpable gap
joint effusion
injury is severe enough to inflame the synovium
hemarthrosis
bleeding into the synovial space
most common ankle sprain
inversion sprain
anterior talofibular ligament
what ligament is most frequently sprained in conjunction with the anterior talofibular ligament?
calcaneofibular ligament
eversion sprain of the ankle? what is injured?
ankle is forced into eversion
deltoid ligament is affected
what type of fracture is common with an eversion sprain of the ankle? (deltoid ligament sprain)
avulsion fracture @ tibia
out of the two collateral ligaments of the knee, which one most commonly injured?
medial collateral ligament
what are the 4 ligaments that can be sprained in the knee?
medial collateral
lateral collateral
anterior cruciate
posterior cruciate
mechanism of injury for medial collateral ligament of the knee
foot fixed the the ground, knee is struck by a medially directed/valgus force
mechanism of injury for the lateral collateral ligament of the knee?
lateral directed/varus force to the knee
mechanism of injury to the anterior cruciate ligament of the knee
tibia is forced anteriorly
mechanism of injury for the posterior cruciate ligament of the knee
tibia is forced posteriorly
what is the most common mechanism of injury for a wrist sprain?
forced hyperextension
what are the 6 ligaments that can be affected with a wrist sprain?
palmar radiocarpal
dorsal radiocarpal
ulnar collateral
radial collateral
inter carpal
triangular fibrocartiaginous
what is damaged during a hyperflexion injury of the wrist?
dorsal radiocarpal ligaments
also the extensor tendons and wrist bones
what is injured during a forced hyperextension sprain of the wrist?
all 6 ligaments are possible
flexor muscle tendons and bones of the wrist
grade 1 shoulder sprain (what is affected)
AC sprain, tearing of the joint capsule
grade 2 shoulder sprain (what is affected)
tear of the joint capsule and the AC ligament
grade 3 shoulder sprain (what is affected)
tear of the joint capsule
AC ligament tear
conoid and trapezoid ligament tears
fracture is possible
most common mechanism of injury for shoulder sprain
falling on to the shoulder itself
what is tendinitis?
inflammation of a tendon
what are tendons made of?
regularly arranged dense collagen fibers
a tendon that moves in a straight line
paratendon
a tendon that runs across a bony prominence is surrounded by
tendon sheath
what is paratendinitis
inflammation of the paratendon or tendon sheath
tendinosis
degeneration changes occurring with chronic tendon injuries. such as tennis elbow
tendons appear in two shapes:
cord like structures
broad sheet like structures-called aponeurosis
what do tendons attach
muscle to bone, they are part of the musclotendinous unit
cause of tendinitis
chronic overload of tendon which leads to micro tearing and inflammation of the tendon
contributing factors to tendinitis
mm imbalances
poor biomechanics
lack of flexibility
chronic degenerative changes in tendon
poor blood supply to tendon
improper equipment
training errors
what are the 4 grades of tendinitis
grade 1: px ONLY after activity
grade 2: px @ beginning of activity, disappears during activity, returns after
grade 3: px @ beginning of activity, during & after. px may restrict activity
grade 4: px with ADL, continues to get worse