Pectoral Girdle Flashcards
(37 cards)
Which two bones compromise the pectoral girdle?
The scapula and the clavicle
Where does the clavicle articulate medically?
Manubrium of the sternum (sternoclavicular joint)
Where does the clavicle articulate laterally?
The acromion process of the scapula (acromioclavicular joint)
Why do humans have clavicles?
- To be a strut (for more mobility of upper limb)
2. Breakable link (due to curved nature) to protect damage to sternoclavicular joint
How do you differentiate the medial and lateral end of the clavicle?
Medical end is bulbous for articulation. Lateral end is flattened in transverse plane.
How do you differentiate posterior and anterior on the clavicle?
The anterior medial side is convex and the lateral anterior side is concave
How do you differentiate the clavicle form superior to inferior?
Superiorly the clavicle is smooth and inferiority the clavicle has lots of bony grooves and protuberances for attatchment
What attaches to the costal tuberosity?
The costoclavicular ligament
What attatches to the subclavian groove?
The subclavius muscle (function is to depress the clavicle)
What attaches to the conoid tubercle?
The conoid ligament
What attaches to the trapezoid line?
The trapezoid ligament
What two joints does the clavicle articulate with?
The sternoclavicular joint (m) and the acromioclavicluar joint (l)
What are the 3 borders of the scapula?
Lateral - axillary
Medial - vertebral
Superior
What are the three angles of the scapula?
Superior angle
Inferior angle
Lateral angle
What are the 3 processes of the scapula?
Corocoid process (lig and muscle)
Scapula spine
Acromion process
What is the name of the anterior side of the scapula and what joint does it form?
Costal side - forms the scapulothoracic joint
What is the name of theposterior side of the scapula and what joint does it form?
The dorsal side -
What is the name of the flattened depression on costal side of the scapula? What muscle attaches here?
The subscapula fossa. The subscapularis
What muscle attaches to the robust medial side of the costal scapula?
The serratus anterior muscle
What is the name of the two fossae on the dorsal side of the scapula?
The supraspious and infraspinous fossae
Which muscles have their medial attachment at the supraspinous and infraspinous fossae?
The supraspinatus muscle and the infraspinatus muscle
What is the purpose of the spinoglenoid notch?
Communication between supraspinous and infraspinous fossae
Where is the suprascapular notch located and what passes through here?
The superior surface of scapula and suprascapula nerve, suprascapular artery and the suprascapular vein
What muscles attach to the supraglenoid and infraglenoid tubercles?
The biceps brachii and the triceps brachii respectively
