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Pectoral region
Dr. Mohammed Mahmoud Mosaed
Pectoral region
Cutaneous innervation
The skin of the pectoral
region is supplied by:
1. Branches of the
supraclavicular n...
MUSCLES OF THE PECRORAL
REGION
• 1. Pectoralis major
• 2. Pectoralis minor
• 3. subclavius
1.Pectoralis major
Origin:
1. Clavicular head; from the front of the
medial third of the clavicle
2. Sternocostal head; fr...
2.Pectoralis minor
Origin: 3rd
, 4th
and 5th
ribs near
their cartilage.
Insertion: Medial aspect of
coracoid process of th...
3.Subclavius muscle
• Origin: First costal cartilage
• Insertion: Lower surface of
clavicle (subclavius groove)
• Action: ...
Serratus anterior muscle
• Origin: From the outer surface of
upper 8 ribs
• Insertion: costal aspect of medial
border and ...
Clavipectoral Fascia
• The clavipectoral fascia is a
strong sheet of connective
tissue that is attached above to
the clavi...
Anatomy of pectoral region
Anatomy of pectoral region
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Anatomy of pectoral region

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Anatomy of pectoral region

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Anatomy of pectoral region

  1. 1. Pectoral region Dr. Mohammed Mahmoud Mosaed
  2. 2. Pectoral region Cutaneous innervation The skin of the pectoral region is supplied by: 1. Branches of the supraclavicular nerve 2. The ventral rami of the intercostal nerves.
  3. 3. MUSCLES OF THE PECRORAL REGION • 1. Pectoralis major • 2. Pectoralis minor • 3. subclavius
  4. 4. 1.Pectoralis major Origin: 1. Clavicular head; from the front of the medial third of the clavicle 2. Sternocostal head; from the anterior aspect of the sternum and the upper six costal cartilages Insertion: Lateral lip of bicipital groove of the humerus Action: 1. Adduction and medial rotation of the arm 2. Flexion of the arm (clavicular portion) Nerve supply 1. Lateral pectoral nerve, C5, 6, 7 2. Medial pectoral nerve, C8, T1
  5. 5. 2.Pectoralis minor Origin: 3rd , 4th and 5th ribs near their cartilage. Insertion: Medial aspect of coracoid process of the scapula Action: • Depresses point of shoulder; if the scapula is fixed, it elevates the ribs of origin • Nerve supply: medial pectoral nerve, C8,T1
  6. 6. 3.Subclavius muscle • Origin: First costal cartilage • Insertion: Lower surface of clavicle (subclavius groove) • Action: Depresses the clavicle and steadies this bone during movements of the shoulder girdle • Nerve supply: Nerve to the subclavius, from the roots of brachial plexus C5,6
  7. 7. Serratus anterior muscle • Origin: From the outer surface of upper 8 ribs • Insertion: costal aspect of medial border and inferior angle of scapula • Action: • Draws the scapula forward around the thoracic wall (protrusion); rotates scapula • Nerve supply: long thoracic nerve, C5,6,7
  8. 8. Clavipectoral Fascia • The clavipectoral fascia is a strong sheet of connective tissue that is attached above to the clavicle. • Below, it splits to enclose the pectoralis minor muscle and then continues downward as the suspensory ligament of the axilla and joins the fascial floor of the armpit.

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