Exam 1 Flashcards
GH abduction/adduction occurs around what axis
anteroposterior
GH flexion/extension occurs around what axis
mediolateral
GH internal/external rotation occurs around what axis
vertical
Arthrokinematics for GH abduction
head of humerus rolls superior and slides inferior
Arthrokinematcis for GH flexion
spin: superior aspect of humerus moves anteriorly
Arthrokinematcis for GH internal rotation
head of humerus rolls anterior and slides posterior
closed packed position for GH joint
full abduction and external rotation
loose packed position for GH joint
45 degrees of abduction
Arthrokinematcis for elevation at SC joint
convex clavicle rolls superior and slides inferior on the concave sternum
which axis does elevation/depression occur in at the SC joint
anteroposterior
which axis does protraction/retraction occur at the SC joint
vertical
which axis does anterior/posterior rotation occur at the SC joint
mediolateral
Arthrokinematcis for protraction at SC joint
concave clavicle rolls and slides anterior
Arthrokinematcis for retraction at SC joint
concave clavicle rolls and slides posterior
Arthrokinematcis for anterior rotation at SC joint
superior aspect of clavicle will face more anterior
Arthrokinematcis for posterior rotation at SC joint
superior aspect of clavicle will face more posterior
close packed position for SC joint
maximal posterior rotation (think about have shoulder flexed)
how many DOF at AC joint
6
upward/downward rotation at AC joint occurs around what axis
anteroposterior
internal/external rotation at the AC joint occurs around what axis
vertical (this type of movement goes along with protraction at SC joint)
close packed for AC joint
90 degrees of shoulder abduction
elevation and depression at the ST joint occurs around what axis
vertical (this is a linear movement)
movements involved in ST elevation
SC joint elevation
AC joint downward rotation
upward/downward rotation at the ST joint occurs around what axis
anteroposterior
movements involved in ST upward rotation
SC joint elevation
AC joint upward rotation
is upward rotation or elevation at the ST joint an angular movement
upward rotation is an angular movement
protraction at the ST joint is accomplished by
SC joint protraction
AC joint internal rotation
Arthrokinematcis for HU joint flexion
concave ulna rolls and slides anterior
Arthrokinematcis for HU joint extension
concave ulna rolls and slides posterior
close packed position for HU joint
full extension
loose packed position for HU joint
flexed to 70 degrees
Arthrokinematcis for HR joint flexion
roll and slide anterior (same as for HU joint)
Arthrokinematcis for HR joint extension
roll and slide posterior (same as for HU joint)
closed packed for HR joint
flexed at 90 degrees
loose packed for HR joint
fully extended (no muscles activated)
what is the articulation at the proximal radioulnar joint
-concave radius with humerus
what is the articulation at the distal radioulnar joint
-concave radius and convex ulna
at the PROXIMAL radioulnar joint what are the arthrokinematics for supination
radius will spin laterally
at the PROXIMAL radioulnar joint what are the arthrokinematics for pronation
radius will spin medially
at the DISTAL radioulnar joint what are the arthrokinematics for supination
radius rolls and slides dorsal
at the DISTAL radioulnar joint what are the arthrokinematics for pronation
radius rolls and slides ventral
radioulnar motion is primarily limited where
at the distal articulation
when are pronators the strongest?
when you are supinated
bicpes brachii is a good supinator when in_______
elbow flexion
brachioradialis is a good supinator when in what_____
pronation
when is the supinator the strongest?
when pronated
can be biceps produce supination when extended?
No bc of a parallel PMA
how many DOF at the radiocarpal joint
2
arthrokinematics for flexion at the radiocarpal joint
proximal carpal row is rolling ventrally and sliding dorsally (bc the convex proximal carpal row is moving on the concave radius)
arthrokinematics for radiocarpal extension
proximal carpal row rolls dorsally and slides ventrally
arthrokinematics for radial deviation
proximal carpal row rolls radially and slides ulnarly
arthrokinematics for ulnar deviation
proximal carpal row rolls ulnarly and slides radially
how many DOF for midcarpal joint
2
What is the axis of rotation for both the radiocarpal and the midcarpal joint
the capitate bone
arthrokinematics for flexion at the midcarpal joint
distal carpal row rolls ventrally and slides dorsally
arthrokinematics for extension and the midcarpal joint
distal carpal row rolls dorsally and slides ventrally
arthrokinematics for radial deviation at the midcarpal joint
distal carpal row rolls radially and slides ulnarly
arthrokinematics for ulnar deviation
distal carpal row rolls ulnarly and slides radially
closed packed at the RC and MC joints
full extension or fully radial deviation
loose packed at the RC and MC joints
anatomical position