GH Flashcards
shoulder girdle is made up of what 3 articulations
GH jt.
scapulothoracic articulation
Sternoclavicular jt
acromioclavicular jt.
AC joint classifications
amphiarthrodial and syndesmosis
arthrodial joint classification
plain jt
condyloid jt classification
ellipsoidal jt such as the knuckles
enarthrodial is also known as
ball and socket
ginglymus is also known as the
hinge joint, such as the elbow
sellar/saddle joint example
SC and thumb
Trochoid jt is also known as
pivot joint such as the radioulnar jt
GH joint classification
enarthrodial
what shoulder muscles insert onto the greater tubercle
supraspinatous
infraspinatous
teres minor
what muscle of the SITS insert on the lesser tubercle
subscapularis
head of the humerous faces ___ deg. superiorly
45
the head of the humerus faces ___ deg. posteriorly
30 to the coronal plane
when is the GH joint most stable
when the superior head contacts the fossa at a 90 deg abduction
most stable means the GH is what?
in closed packed position and ligaments are taught
the trade off for lack of greater deg. of motion is
lack of stability
what is the closed packed position of the GH?
full abduction and ER
what is the open packed position of the GH?
55 deg. of abd and 30 deg. horizontal adduction
AC and SC Jt. closed packed postion
90 deg. of arm abduction and elevation
AC and SC open packed position
at rest
Glenohumeral Fossa contains what to help with stability
the labrum
if glenoid labrum s injured what happens the the stability of the shoulder
it will decrease
what muscle tendon inserts onto the labrum
the long head of the biceps brachi
what is the # 1 joint of the body to dislocate
the GH