Pectorals Major + Minor Flashcards
What are the origins of pectorals major?
Clavicle
Sternum
Costal Cartilages
Where is the insertion of pectorals major?
Humerus
What are the actions of pectorals major
Medial rotation
adduction
What are the 4 vertical lines of pectorals major?
mid clavicular
anterior axillary
mid axillary
posterior axillary
What nerves innervate pec major?
Medial and lateral pectoral nerves
From what ribs does the pec minor muscle origins from?
Ribs 3-5
Where is the insertion of pec minor?
Coracoid process
what nerve innervates pec minor?
medial nerve
What is the function of pec minor?
Depression of the scapula
Where is the origin of serrates anterior?
ribs 1 to 8
Where is the insertion of serrates anterior?
Sub-scapula surface
What innervates the serrates anterior?
long thoracic nerve
What is the function of serrates anterior?
upward protraction.
Where does the deltoid muscle originate?
scapular and clavicle
Where is the insertion of the deltoid muscle?
Humerus
What is the function of the deltoid muscle?
abduction of the arms
What nerve innervates the deltoid muscle?
axillary nerve
What are the articulations of the clavicle?
sternoclavicualr and acromion
How does contraction of pec major assisting in breathing?
normally should not unless disease or breathing. contracts and allows inhalation
Whats forms the edge of anteriorly axillary fold?
Edge of pec major muscle
What are the subcutaneous structures that lie anterior to the chest wall?
Clavicle
Sternum
What are the articulates of the clavicle?
sternoclavicular joint
acromioclavicular joint
What form the anterior axially fold?
Lower edge of pec major muscle
What lies deep the pectorals major?
The axilla
