Lecture9: Shoulder Region 2 Flashcards
What are scapular muscles attached to bar the subscapularis?
The back of the scapula
What is the subscapularis attached to?
The front of the scapula
Which border are both teres muscles attached to?
Lateral border
Where are the supra, infrascapularis and teres minor inserted?
In the greater tuberosity of the humerus
Where is the subscapularis inserted?
Lesser tuberosity
Where is the teres major inserted?
In the Bicipital groove of the humerus
What nerve supplies both Supra and infraspinatus?
The suprascapular nerve
What supplies teres minor?
Axillary nerve
What supplies teres major?
Lower subscapular nerve
What supplies the subscapularis?
Upper, lower subscapular nerve
Which muscle initiates abduction?
Supraspinatus
Which 2 muscles are for lateral rotation of the arm?
Both teres muscles
Which muscle is for medial rotation, adduction and extension of arm?
The subscapularis
What is the attachment of the serratus anterior muscle?
From the upper ribs to the front of the medial border of the scapula
What is the Serratus Anterior nerve supply?
The Long Thoracic Nerve
What is the Serratus Anterior action?
Raising arms above head
Which nerve is liable for injury during mastectomy?
Long Thoracic Nerve
What does Long Thoracic Nerve injury lead to?
Winging of the scapula
What rotates the shoulder above 90 degrees?
Both deltoid and Serratus anterior
Which fibres of the deltoid complete the 90 degree rotation?
Middle fibres
What is the Quadrangular space bordered by?
Both teres, long head of the triceps and neck of humerus
What does the Quadrangular space contain?
Axillary nerve and posterior circumflex humeral artery
What bounds the medial triangular space?
Both teres and long head of triceps
What does the Medial Triangular space contain?
The Circumflex Scapular vessels
What bounds the lateral triangular space?
Teres major, long head of biceps and humerus
What does the Lateral Triangular space contain?
The radial nerve and profunda brachii artery
What is on the Articular surface of the shoulder joint?
Head of humerus
What is the shoulder joint medially attached to?
Glenoid cavity
What is the shoulder joint laterally attached to?
Neck of humerus
Which structure does the synovial membrane not line?
Articular cartilage
What is the most common site for shoulder dislocation?
Inferior aspect of the capsule
