Diagnostic Imaging - Shoulder Flashcards
At any given point in time only about ___ of the humeral head makes contact with the glenoid fossa
30%
The scapulothoracic bursa is located between the
SA and the ribs
Clavicle is considered what type of bone
long bone - even though it does not have a medullary canal
Ossification of the shoulder skeletal components begins with the
two primary ossification centers of the clavicle at the 5th week of gestation
When does the secondary center of the clavicle fuse
(the sternal side of the bone fuses with the shaft) between 18 and 25 years
Which bone is typically the last of the long bones to fuse
clavicle
When is the humeral head evident
6 months
When is the greater tuberosity evident
1 to 3 years
When is the lesser tuberosity evident
4 to 5 years
The tuberosities fuse to the humeral head around what age
7
The proximal epiphyseal plate is fused when
at about 19 years
Somewhat earlier for females than males
The scapula ossifies primarily via
intramembranous ossification
Coracoid
Appears:
Fuses to scap:
3-18 months
18-25 years
Base of coracoid and upper glenoid fossa
Appears:
Fuses to scap:
7 years
15-18 years
Acromion
Appears:
Fuses to scap:
14-20 years
22-25 years
Inferior angle
Appears:
Fuses to scap:
15 years
20 years
Vertebral borders
Appear:
Fuses to scap:
16 years
25 years
Glenoid fossa
Appear:
Fuses to scap:
10 years
20 years