Muscles of the Pectoral Region

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How many muscles are in the pectoral region and what are their names? what is the other name for them?
- anterior axioappendicular muscles
- 4 muscles
- pectoralis major
- pectoralis minor
- subclavius
- serrauts anterior
Pectoralis major
- most superficial in the pectoral region
- There are two parts the clavical head and the sternocostal head
- Innervation : medial and lateral pectoral nerves
- Artery supply:Pectorial branches of the thoracoacromial artey, internal thoracic artery.
- movement: medially rotates, flexes and adducts the humerus
Pectoralis Minor
- innervation:medial pectoral nerve
- artery supply: pectoralis and deltoid bracnches of the thoracoacromial artery
- movement: anteriroly tilts and depresses the scapula; abdution
subclavius
- movement: depresses the scapula and stabilize the scapulaclavical joint.
- innervation:nerve to subclavius muscle
- artery: clavicular branch of the thoracoacromial artery
what is the significance of the deltopectoral triangle?

it houses the cephalic vein
medial and lateral pectoral nerves
- the nerves are named according to their attachment to the brachial postion and not their actual anatomical postion
- they are in the opposite position that you would think
What important features can you find when you dissect the claviculat head of the pectoralis major?
- the lateral pectoral nerve
- pectoral branch of the thoracoacromial artery
Clavipectoralis fascia

lies both deep and superficial to the pectoralis minor and the subclavius
Medial pectoral nerve

pierces the pectoralis minor and go to the pec. major.
The branches of which main artery supplies the arterial flow for all the pectorial muscles ? what are the main branches? how many?
- Thoracoacromial artery
- Branches:
- Pectoral - largest
- Deltoid - lateral
- Acromial- superior to corcoid process
- Clavical- medial

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Muscles of the Pectoral Region

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Updated

2020-08-13T15:20:11Z