Scapular Muscles Flashcards
Name the rotator cuff muscles?
- Supraspinatus
- Infraspinatus
- Teres minor
- Subscapularis
Name the scapular muscles?
- Deltoid
- Teres Major
- Rotator cuff muscles
Main action of deltoid muscle?
- Ant. part: flexes & medially rotates arm
- Mid. part: abducts arms
- Post. part: extends & laterally rotates arm
Main action of teres major muscle?
- Adducts arm
- Medially rotates arm
Main action of supraspinatus muscle?
- Assists deltoid in abduction of arm
- Acts with rotator cuff muscles
Main action of Infraspinatus muscle?
- Laterally rotates arm
- Hold head of humerus in glenoid cavity
Main action of teres minor muscle?
- Laterally rotates arm
- Holds head of humerus in glenoid cavity
Main action of subscapularis muscle?
- Medially rotates
- Adducts arm
- Acts with rotator cuff muscles
Innervation of deltoid muscle?
Axillary nerve
Innervation of teres major muscle?
Lower subscapular nerve
Innervation of supraspinatus muscle?
Suprascapular nerve
Innervation of infraspinatus muscle?
Suprascapular nerve
Innervation of teres minor muscle?
Axillary nerve
Innervation of subscapularis muscle?
Upper & lower subscapular nerves
Proximal attachment of deltoid?
- Lat. third of clavicle
- Acromion
- Spine of scapula
Distal attachment of deltoid?
Deltoid tuberosity of humerus
Proximal attachment of teres major?
Post. surface of inf. angle of scapula
Distal attachment of teres major?
Med. lip of intertubercular groove of humerus
Proximal attachment of supraspinatus?
Supraspinous fossa of scapula
Distal attachment of supraspinatus?
Greater tubercle of humerus
Proximal attachment of infraspinatus?
Infraspinous fossa of scapula
Distal attachment of infraspinatus?
Greater tubercle of humerus
Proximal attachment of teres minor?
Sup. part of lateral border of scapula
Distal attachment of teres minor?
Greater tubercle of humerus
Proximal attachment of subscapularis?
Subscapular fossa
Distal attachment of subscapularis?
Lesser tubercle of humerus
