Pectoral Girdle Flashcards
The pectoral girdle consists of __ & __
Clavicle & Scapula
The Medial or Sternal end of the clavicle articulates with __
Sternum (Manubrium) and 1st Rib
The Lateral or Acromial end of the clavicle articulates with __
Scapula: Acromion
What part fails to complete the pectoral girdle behind?
Scapulae
Functions of the Pectoral GIrdle
- Attach upper limb to trunk
- Provides attachment site for muscle
- Allows for mobility
AKA Collarbone
Clavicle
Medial __ is __ anteriorly
Medial 2/3 is convex anteriorly
Lateral __ is __ anteriorly
Lateral 1/3 is concave anteriorly
Part of the clavicle that is convex anteriorly
Medial 2/3
Part of the clavicle that is concave anteriorly
Lateral 1/3
Sternoclavicular Joint is formed by the articulation of __ & __
Sternal (medial) end of the Clavicle & the Manubrium of the Sternum
Acromioclavicular Joint is formed by the articulation of __ & __
- Acromial (Lateral) End of the Clavicle
- Acromion of the Scapula
What are the 2 sets of ligaments at the lateral end of the clavicle?
Coracoclavicular Ligaments
1. Conoid (Medial)
2. Trapezoid (Lateral)
Functions of the Clavicle
- Provides attachment for muscles
- Acts as a brace to hold scapula and arms laterally from the thorax
- Transmit compressive forces from the upper limb to the Axial Skeleton
What is usually fractured when a person lands on his/her hand
Clavicle
AKA Shoulder Blade
Scapula
Thin, traingular flat bones on the dorsum of the ribcage
Scapula
The Scapula is found at which level of the ribcage
2nd - 7th ribs
Medial Border of the Scapula
Vertebral Border
Lateral border of the scapula
Axillary Border
What forms the Shoulder Joint
Articulation of the Glenoid Cavity (Fossa) with the Humeral Head
What muscles attach to the Coracoid Process
- Pectoralis Minor
- Short Head of Biceps Brachii
- Corachobrachialis
Passageway of the Suprascapular nerve
Suprascapular Notch
What structure is found posteriorly at the level of TV3
* It ends laterally as the __ which articulates with __ to form the acromioclavicular joint
Spine of the Scapula
* Ends laterally as the Acromion which articulates with the Acromial end of the clavicle to form the acromioclavicular joint
Fossa located superior to the spinous process
* What muscle attaches to this fossa
Supraspinous Fossa
* Supraspinatus muscle
Fossa located inferior to the spinous process
* Muscle that attaches to this fossa
Infraspinous Fossa
* Infraspinatus muscle
Fossa located anterior to the scapula
* Muscle attached
Subscapular Fossa
* Subscpularis muscle
