Shoulder Girdle Flashcards
Shoulder Girdle are consists of two bones, the:
Clavicle and Scapula
function of two bones
TO CONNECT each upper limb to the trunk or axial skeleton
Anteriorly, the shoulder girdle connects to the trunk at the ______
upper sternum
Posteriorly, the connection to the trunk is incomplete because the scapula is connected to the trunk by ____
muscles only
Each shoulder girdle and each upper limb connect at the shoulder joint between the ______ and ____
scapula, humerus
Each clavicle is located over the ______
upper anterior anterior rib cage
Each scapula is situated over the ________
upper posterior rib cage
The upper margin of the scapula is at the level of the
second posterior rib
The lower margin is at the level of the
seventh posterior rib (T7)
The lower margin of the scapula corresponds to T7, also used as a
landmark for location of the central ray for chest positioning
is a long bone with a double curvature that has three main parts
Clavicle
Three main parts of clavicle
two ends and long central portion
The lateral or acromial extremity (end) of the clavicle articulates with the acromion of the scapula. This joint or articulation is called
acromioclavicular joint
The medial or sternal extremity (end) articulates with the manubrium, which is the upper part of the sternum. This articulation is called the
sternoclavicular joint
the elongated portion between the two extremities.
body (shaft)
forms the posterior part of the shoulder girdle, a flat triangular bone with three borders, three angles and two surfaces.
Scapula (shoulder blade)
forms the posterior part of the shoulder girdle, a flat triangular bone with three borders, three angles and two surfaces.
Scapula (shoulder blade)
The three borders are the:
- medial (vertebral) border
- superior border
- lateral (axillary) border
long edge/border near the vertebrae
medial (vertebral) border
uppermost margin of the scapula
superior border
border nearest to the axilla
lateral (axillary) border
The three corners of the triangular scapula are called
angles
thickest part and ends laterally in shallow depression
lateral angle or head of the scapula
the shallow depression is called the
glenoid cavity (fossa)
The humeral head articulates with the glenoid cavity of the scapula to form the _______
scapulohumeral joint, also known as glenohumeral joint or shoulder joint
The constricted area between the head and the body of the scapula is the
neck
The body (blade) of the scapula is arched for ________
greater strength
The body (blade) of the scapula is arched for ________
greater strength
The thin, flat, lower part of the body sometimes is referred to as the ____ or _____
wing, ala
The anterior surface of the scapula is termed the _________ because of its proximity to the ribs
costal surface
The middle area of the costal surface presents a large concavity or depression, known as the ______
subcapular fossa
is a long, curved process that extends laterally over the head of the humerus
acromion
is a thick, beaklike process that projects anteriorly beneath the clavicle
coracoid process
a notch on the superior border that is partially formed by the base of the coracoid process
scapular notch
The spine separates the posterior surface an _______ and a _________
infraspinous fossa and supraspinous fossa
The posterior border or ridge of the spine is termed the
crest of the spine
taken with the arm abducted para indi mag superimpose ang scapula
AP projection
In lateral projection patient is in ________ with the upper body rotated until the scapula is separated from the rib cage in a true end-on or lateral projections
anterior oblique position
What are the 3 joints or articulations involved in the shoulder girdle?
- Sternoclavicular joint
- Acromioclavicular joint
- Scapulohumeral joint (glenohumeral or shoulder joint)
The three joints or articulations are classified as
synovial joints
The mobility type of all three of these joints is
freely movable or diarthrodial
Movement type of Scapulohumeral joint
spheroidal (ball and socket) joints
wc allows great freedom of movement
Movement type of Sternoclavicular joint
double plane or gliding joint
Movement type of Acromioclavicular joint
plane or gliding joint
commonly taken on non-trauma patients when gross fractures or dislocations of the humerus have been ruled out
Proximal Humerus Rotation
delineate well the scapulohumeral joint revealing the calcium deposits or other pathologies
AP Rotational Projections
