Uploaded January 2022 | Updated September 2026, 3 weeks ago

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Content
0:00 Introduction
0:28 Division of the Shoulder Muscles
1:07 Deltoid
2:18 Subscapularis
2:41 Supraspinatus
3:03 Infraspinatus
3:16 Teres Minor
3:32 Teres Major
3:57 Rotator Cuff Muscles

Muscles of the shoulder joint
- Deltoid
- Subscapularis
- Supraspinatus
- Infraspinatus
- Teres Minor
- Teres Major

Deltoid
musculus deltoideus
- Spinal Part
O: Spine of Scapula
spina scapulae
- Acromial Part
○ O: Acromion of Scapula
- Clavicular Part
○ O: Clavicle
- I: Deltoid Tuberocity of Humerus
tuberositas deltoidei humeri
- Function:
A: Abductio brachii
C: Rotatio Brachii Interna
S: Rotatio Brachii Externa
S+C = Adduction
A+C = Flexion
A+S = Extention
-
Subscapularis
musculus subscapularis
- O: Subscapular Fossa
fossa subscapularis
- I: Lesser tubercle + crest of humerus
tuberculum minus humeri et crista tuberculi minoris
- F: Adduction, Internal Rotation

Supraspinatus
musculus supraspinatus
- O: Supraspinous Fossa
fossa supraspinata
- I: Greater tubercle of humerus
tuberculum majus humeri
- F: Abduction

Infraspinatus
musculus infraspinatus
- O: Infraspinous Fossa
fossa infraspinata
- I: Greater tubercle of humerus
tuberculum majus humeri
- F: External Rotation

Teres Minor
musculus teres minor
- O: Lateral margin of Scapula
margo lateralis scapulae
- I: Greater tubercle of humerus
tuberculum majus humeri
- F: External Rotation, Extention

Teres Major
musculus teres minor
- O: Inferior Angle of Scapula
angulus inferior scapulae
- I: Crest of lesser tubercle of humerus
crista tuberculi mionoris humeri
F:
- Adduction
- Extension
- Internal rotation

Rotator Cuff Muscles
- Subscapularis
musculus subscapularis
- Supraspinatus
musculus supraspinatus
- Infraspinatus
musculus infraspinatus
- Teres Minor
musculus teres minor
- Stabilize the shoulder joint
○ Clinical Importance ⚠
§ Rotator Cuff Tear
§ Tendinitis
§ Bursitis