Anatomy Of The Shoulder With Rotator Cuff Tears Flashcards
What is the main job of the muscles of the rotator cuff?
To stabilize the glenohumeral joint , however they are also used to move the shoulder
What muscle is the main internal rotator of the shoulder?
Subscapularis
Location of the Subscapularis tendon, see photo
Rotator interval (see photo)
What muscle is the main initiator of shoulder ABduction
Supraspinatus and works with the deltoid to complete full shoulder ABduction
What muscles of the rotator cuff are responsible for external rotation of the shoulder in the neutral position ?
The infraspinatus
What muscle of the rotator cuff is responsible for external rotation when the shoulder is abducted at 90°
The Teres Minor
Identify the supraspinatus and infraspinatus (see photo)
What is the primary arterial supply of blood to the rotator cuff?
The anterior humeral circumflex artery and axillary artery
Where do the nerves of the rotator cuff originate from
The brachial plexus
What nerve innervates the teres minor, deltoid and long head of the tricep ?
The axillary nerve
What nerve is primarily responsible for innervating the supraspinatus and infraspinatus muscle
The suprascapular nerve
What nerve is also responsible for superficial sensation of the shoulder
Suprascapular nerve
Injury, entrapment, or compression of the _________ may cause weakness or paralysis of the posterior rotator cuff muscles
The Suprascapular nerve
What nerve Intervista subscapularis and the teres major muscle?
subscapular nerve
