Slideshow: Shoulder Region Anterior The Funky Professor videos can viewed here: http://publishing.rcseng.ac.uk/journal/video?videoTaxonomy=FUNK

1. Anterior Shoulder Region

2. The anterior shoulder or pectoral
region is formed by
• Pectoralis Major
• Pectoralis Minor

3. Pectoralis Major has two heads

4. Pectoralis Major has two heads
• sternocostal head

5. Pectoralis Major has two heads
• sternocostal head
• clavicular head

6. Anterior View
Pectoralis Major attaches
to the lateral lip of the
bicipital groove of the
proximal humerus

7. Pectoralis Major
Is supplied by the
medial and lateral
pectoral nerves

8. Pectoralis Major
Sternocostal head adducts
and
medially rotates the arm
clavicular head adducts
and flexes the arm

9. Pectoralis Minor attaches to the
coracoid process of the scapula

10. Pectoralis Minor attaches to the
coracoid process of the scapula
Anterior view

11. Pectoralis Minor
Arises from ribs 3,4,5
It protracts the scapula

12. Pectoralis Minor
Is supplied by the
Medial
pectoral nerves

13. The anterior fibres of
Deltoid muscle
lie at the lateral aspect
of the anterior chest
wall

14. Muscles Summary

15. Anterior Chest Wall
Pectoralis Major
Origin Clavicular head: anterior surface
of medial half of clavicle;
Sternocostal head: anterior
surface of sternum, superior six
costal cartilages, and aponeurosis
of external oblique muscle
Insertion Lateral lip of intertubercular
groove of humerus
Action Adducts and internally rotates
humerus; moves scapula
anteriorly and inferiorly;
Nerve Supply Lateral and medial pectoral
nerves (C5, C6, C7, C8, and T1)
Blood Supply pectoral branch of
thoracoacromial trunk

16. Anterior Chest Wall
Pectoralis Minor
Origin 3rd to 5th ribs near their costal
cartilages
Insertion Medial border and superior
surface of coracoid process of
scapula
Action Stabilises scapula, pulls it
inferiorly and anteriorly
against thoracic wall
Nerve Supply Medial pectoral nerves; (C8
and T1)
Blood Supply Pectoral branch of the
thoracoacromial trunk

17. Anterior Chest Wall
Serratus Anterior
Origin Superolateral surfaces of
upper 8 or 9 ribs at the side of
chest
Insertion Medial border of scapula
Action Pulls scapula forward and
upward; abducts and rotates
it; stabilises medial border of
scapula
Nerve Supply Long thoracic nerve (C5, C6,
C7)
Blood Supply Circumflex scapular artery

18. Deltoid
Origin Lateral third of clavicle,
acromion, and spine of scapula
Insertion Deltoid tuberosity of humerus
Action Anterior part: flexes and
internally rotates arm; Middle
part: abducts arm; Posterior
part: extends and externally
rotates arm
Nerve Supply Axillary nerve (C5 and C6)
Blood Supply Deltoid branch of
thoracoacromial artery