PAS 407 Shoulder Girdle UPDATED ACTUAL Questions and CORRECT Answers
bones connecting axial and upper appendicular skeleton
(clavicle and scapula)
pectoral girdle
Where does axioappendicular muscles originate off and
originate off thorax to attach to scapula, clavicle, humerus
attach to?
Where does scapulohumeral muscles originate off and
originate off the scapula to attach to the humerus
attach to?
pectoral region - anterior
What is the shoulder subdivided into? deltoid region - lateral
scapular region - posterior
- Almost all movements of the upper limb involve position-
ing the hand for manual activities
Form fits function - Structure emphasizes range of motion
- Stability is compromised, leading to wide variety of com-
mon injuries
superior margin of pectoral region
- gives degree of protection to vital neurovascular struc-
tures beneath
"S" shaped bone that articulates with sternum medially
clavicle
and anteriorly and with scapula laterally and posteriorly
- Triangular shaped sternal head articulates with manubri-
um, forming the sternoclavicular joint
, - Broad, flat lateral end articulates with acromion process
of scapula through acromioclavicular joint
structural weak point 2/3 along the mid shaft of the clavi-
cle.
arguably the most commonly broken bone in the body.
clavicular fractures
fx causes prominent deformity due to elevation of medial
fragment (due to muscle pull) and sag of lateral aspect
(due to limb sag)
Synovial saddle joint between manubrium, 1st costal car-
tilage and proximal end of clavicle
- Behaves like a ball and socket joint
- Due to presence of articular disc; assists with multiplanar
Sternoclavicular joint motions
strong ligaments
what is the sternoclavicular joint reinforced by?
- Intracapsular anterior and posterior sternoclavicular lig-
aments
, - Extracapsular costoclavicular ligament limits elevation
Synovial plane joint between distal end of clavical, medial
surface of acromion process
- Partially separated by incomplete, wedge-shaped artic-
ular disc
Indirect link between scapula and axial skeleton
Ligaments:
- Some reinforcement by intracapsular acromioclavicular
Acromioclavicular joint ligament along superior surface
- Primary reinforced by extracapsular coracoclavicular lig-
aments; suspension of scapula on clavicle
- Conoid ligament
- Trapezoid ligament
inverted cone shape; runs vertical (more medial of two
bands, apex attached to coracoid process)
Conoid ligament
quadrangular band; runs obliquely (lies laterally and runs
Trapezoid ligament
in a oblique angle to insert on clavicle)
what movements are permitted with acromioclavicular
joint?
bones connecting axial and upper appendicular skeleton
(clavicle and scapula)
pectoral girdle
Where does axioappendicular muscles originate off and
originate off thorax to attach to scapula, clavicle, humerus
attach to?
Where does scapulohumeral muscles originate off and
originate off the scapula to attach to the humerus
attach to?
pectoral region - anterior
What is the shoulder subdivided into? deltoid region - lateral
scapular region - posterior
- Almost all movements of the upper limb involve position-
ing the hand for manual activities
Form fits function - Structure emphasizes range of motion
- Stability is compromised, leading to wide variety of com-
mon injuries
superior margin of pectoral region
- gives degree of protection to vital neurovascular struc-
tures beneath
"S" shaped bone that articulates with sternum medially
clavicle
and anteriorly and with scapula laterally and posteriorly
- Triangular shaped sternal head articulates with manubri-
um, forming the sternoclavicular joint
, - Broad, flat lateral end articulates with acromion process
of scapula through acromioclavicular joint
structural weak point 2/3 along the mid shaft of the clavi-
cle.
arguably the most commonly broken bone in the body.
clavicular fractures
fx causes prominent deformity due to elevation of medial
fragment (due to muscle pull) and sag of lateral aspect
(due to limb sag)
Synovial saddle joint between manubrium, 1st costal car-
tilage and proximal end of clavicle
- Behaves like a ball and socket joint
- Due to presence of articular disc; assists with multiplanar
Sternoclavicular joint motions
strong ligaments
what is the sternoclavicular joint reinforced by?
- Intracapsular anterior and posterior sternoclavicular lig-
aments
, - Extracapsular costoclavicular ligament limits elevation
Synovial plane joint between distal end of clavical, medial
surface of acromion process
- Partially separated by incomplete, wedge-shaped artic-
ular disc
Indirect link between scapula and axial skeleton
Ligaments:
- Some reinforcement by intracapsular acromioclavicular
Acromioclavicular joint ligament along superior surface
- Primary reinforced by extracapsular coracoclavicular lig-
aments; suspension of scapula on clavicle
- Conoid ligament
- Trapezoid ligament
inverted cone shape; runs vertical (more medial of two
bands, apex attached to coracoid process)
Conoid ligament
quadrangular band; runs obliquely (lies laterally and runs
Trapezoid ligament
in a oblique angle to insert on clavicle)
what movements are permitted with acromioclavicular
joint?
