Convex Concave Rules
When the concave surface is fixed and the convex surface moves on it, the convex surface rolls and glides in what direction?
opposite
What is the closed packed position of the tibiofemoral joint?
extension
In open chain, when the convex femoral head moves on the acetabulum,
flexion the femoral head moves _______ and the acetabulum, glides ______
Anteriorly
posteriorly
Flexion of the atlantooccipital joint, the occipital condyle roll ____ and the facets move _____
Anterior
posterior
What is a convex surface and a concave surface?
Concave = hollowed or rounded inward
convex = curved or rounded outward
When the convex surface is fixed and the concave surface moves on it, the concave surface rolls and glides in what direction?
The same direction
During knee extension, in open chain, how does the tibia glide on the femur?
During knee flexion in closed chain, how does the femur glide on the tibia?
anteriorly
posteriorly
in a closed chain position, the talocrural joint the talus moves ____ and the mortise (part of tibia) moves _____ in dorsiflexion
anteriorly
anteriorly
on same side rotation of c2-7 the inferior facets slides _____ and _____ on superior facets
posterior and inferior
Why does the arthrokinematic rule of convex and concave change for the thumb?
The thumb is a saddle joint, a saddle joint is both convex and concave on one side
In closed chain, what bone is moving and what bone is fixed?
What is the "screw-home" mechanism?
rotation between the tibia and femur occurs automatically between full extension and 20 degrees of knee flexion
The talocrural joint what is the convex and what is the concave surface?
convex = talus
concave = mortise (tibia and fibula)
Sacral ILA (inferior lateral angle) cranial pressure helps with what?
helps if one side of the sacrum is lower to apply pressure
What types of movement occur at a saddle joint ex. trapeziometacarpal.
saddle joint move in
flexion-extension
abduction-adduction
When concave moves on convex, what direction do they roll and glide?
Same direction
During glenohumeral ABduction, the humeral head rolls ____ and the glenoid fossa glides ____.
upward, downward
convex moving on concave = opposite direction
Inferior glide of the hip promotes what movement?
Abduction
*so the ball does not keep rolling up the wall* (for steph to remember dont use)
the convex concave have to move opposite ways
Bilateral PA pressure, stabilize the L side and press on the R contralateral sign in a PA motion, helps with what?
L rotation
if R leg appears longer than the left, and the left appears shorter than the right, then the R pelvis is ______ rotated, and to fix this what muscles will you activate in muscle synergy
anteriorly
posterior chain
If the moving joint surface rolls on its partner without simultaneously gliding, what would happen to the surfaces?
The surfaces would gap or subluxate
What are the capsular patterns for the hip, knee, tibiofibular, talocrural, subtalar, and midtarsal joints?
hip = flexion, internal rotation, abduction
knee = flexion, extension
tibiofibular = pain when joint stressed
talocrural = plantar flexion, dorsiflexion
subtalar = limitation of varus range of movement
midtarsal = dorsiflexion, plantar flexion, adduction, medial rotation
What are the capsular patterns of the glenohumeral joint, sternoclavicular joint, acromioclavicular joint, humeroulnar, radio humeral, proximal radioulnar, distal radioulnar, wrist, trapeziometacarpal.
Glenohumeral = external rotation, abduction, internal rotation
sternoclvicular = pain at extreme end range of movement
acromioclvicular= pain at extreme end range of movement
humeroulnar = flexion, extension
radiohumeral = flexion, extension, supination, pronation
proximal radioulnar = supination, pronation
distal radioulnar = pain at extremes of rotation
wrist = flexion and extension equally limited
trapeziometacarpal = abduction, extension
Describe the capsular pattern for cervical spine, thoracic spine, and lumbar spine
cervical = side bending & rotation equally limited, extension
thoracic spine = side bending & rotation equally limited, extension
lumbar spine = side bending & rotation equally limited, extension
With knee extension the patella moves ____
with knee flexion the patella moves ____
superiorly
inferiorly