Breast Flashcards
What muscles are found in the breast area?
Pectoralis Major
Deltoid
Pectoralis Minor
Subclavius
Innervation of pectoralis major
medial and lateral pectoral nerve
Insertion of pectoralis minor
Coracoid process and greater tubercle of the humerus
What are the origins of pectoralis major?
clavicular and sternal head
inter-tubercular groove of the humerus
anterior layer of rectus sheath
costal cartilage 2-6
Origin of pectoralis minor
rib 3-5
Insertion of pectoralis minor
coracoid process of the scapula
Innervation of pectoralis minor
medial pectoral nerve
What does the lateral pectoral nerve innervate?
Pectoralis major and deltoid
What does the medial pectoral nerve innervate?
Pectoralis major, minor and deltoid
Innervation of subclavius muscle
subclavian nerve
Origin and insertion of subclavius
Origin - 1st rib
insertion - lower surface of the clavicle
What movements are the pectoralis major responsible for?
flexion
adduction
Internal rotation of humerus
What movements are the pectoralis minor responsible for?
adduction
rotation of scapula
What is the function of the subclavius muscle?
Stabilisation of the clavicle