Shoulder - Origin, Insertion Flashcards
Anterior deltoid
O – lateral 1/3 of clavicle
I – deltoid tubercle of humerus
Middle deltoid
O – lateral border of acromion
I – deltoid tubercle of humerus
Posterior deltoid
O – spine of scapula
I – deltoid tubercle of humerus
Pectoralis major
***2 heads of origin - one insertion point
Clavicular head O – anterior medial 1/2 of clavicle
Sternocostal head O – ant surface of sternum and superior 6 costal cartilages
I – lateral to intertubercular groove of humerus
Pectoralis minor
O – ribs 3-5
I – medial side of coracoid process of scapula
Sternocleidomastoid
***2 heads of origin - one insertion point
Sternal head O – upper part of anterior surface of manubrium
Clavicular head O – sup surface of medial 1/3 of clavicle
I – lateral surface of mastoid process of temporal bone, superior nuchal line
Upper trapezius
O – EOP, nuchal line and ligamentum nuchae
I – post aspect of lat 1/3 of clavicle
Middle trapezius
O – ligamentum nuchae
I – medial aspect of acromion
Lower trapezius
O – T1-T12
I – spine of scapula
Subclavius
O – costochondral junction of 1st rib
I – subclavian groove of clavicle
Serratus anterior
O – external surface of lateral parts of ribs 1-8
I – ant surface of medial border of scapula
Latissimus dorsi
O – SP T6-T12, thoracolumbar fascia (L1-L5, posterior aspect of iliac crest)
I – floor of intertubercular groove of humerus (passes medial to humerus to get there)
Levator scapulae
O – transverse processes of C1-C4
I – superior angle and sup part of medial border of scapula
Rhomboid minor
O – lower part of ligamentum nuchae and spinous processes of C7-T1
I – sup to rhomboid major on medial border scapula
Rhomboid major
O – spinous processes of T2-T5
I – inferior aspect of medial border of scapula
Teres major
O – posterior surface of inf angle of scapula
I – medial to intertubercular groove of humerus
Teres minor
O – middle 1/2 of lateral border of scapula
I – inferior facet of greater tubercle of humerus
Supraspinatus
O – supraspinous fossa
I – sup facet of greater tubercle
Infraspinatus
O – infraspinous fossa
I – middle facet of greater tubercle
Subscapularis
O – subscapular fossa
I – lesser tubercle of humerus
Identify the 4 mm that **originate from the clavicle **
- Deltoid
- Pectoralis major
- SCM
- Sternohyoid
Identify the 2 mm that insert on the clavicle
- Upper trapezius
- Subclavius
Superficial posterior mm (2)
- Trapezius
- Latissimus dorsi
Deep posterior mm (2)
- Levator scapular
- Rhomboids
Scapulohumeral mm (6)
- Deltoid
- Teres major
- Supraspinatus
- Infraspinatus
- Teres minor
- Subscapularis
What 4 mm make up the rotator cuff
- Supraspinatus
- Infraspinatus
- Teres minor
- Subscapularis
Subscapularis Inn.
Upper & lower subscapular N. (C5-C6)
What clavicle landmark serves as the attachment site of the conoid portion of the coracoclavicular ligament
Conoid tubercle
Attachment of trapezoid portion of coracoclavicular ligament
Trapezoid line of clavicle
Insertion site of subclavius muscle
Subclavian groove (clavicle)
Serves as the attachment (insertion) site for the subscapularis muscle
Lesser tubercle (tuberosity) of humerus
Serves as an attachment for 3 of the 4 rotator cuff muscles
Greater tubercle (tuberosity)
Arises from the lateral cord of the brachial plexus
Lateral pectoral n.
Arises from the medial cord of the brachial plexus
Medial pectoral n.
