what are the main contents of the axilla and how many are there?
portions of 3 muscles
a network of nerves innervating the upper limb
The beging above the clavical and terminates inferolateraly to the
Base of axilla
skin and fascia of the armpit
anterior wall of the axilla
defined by the anterior axillary fold
pec. min. and pec. major and the clavipectoral fascia
posterior wall of the axilla
defined by the posterior axillary fold
teres major, latissium dorsi ,subscapularis muscles
Medial wall of the axilla
The lateral thoracic wall, the serratus anterior muscle
lateral wall of the axilla
the intetubercular sulcus of the humerus
a thin layer of connective tissue arounding the axillary vessels and component of the brachail plexus
The sheath extends from the first rib to the teres major
formed from the joining of the brachial and basilic vein
formed near the lateral border of the teres major
ends near the lateral border of the first rib at which point the cepahalis vein drains into it
medial to the cephalic vein drainage the axillary artery changes into the Subclavian vein.
begins at the lateral border of the 1st rib
they run together with the axillary vein
and it is a continuation of the subclavian artery .
it ends at the inferior border of the teres muscles where it turns into the brachial artery
how many parts are there to the axillary artery and where are they?
there are 3 parts
the 1st, 2nd, and 3rd!
1st- later to the first rib and medial to the pectoralist minor
: posterior to the pectoralis minor
: laterl to the pectoral minor and inferior to the teres major
what is the branch of the first part of the axillary artery
superior thoracic artery
what are the branches of the second part of the axillary artery
lateral thoracic artery
what is the special feature about the later thoracic artery?
it is often called the lateral mamillary artery because in females it supplies the lateral portion of the breast
Apex of axilla
clavicle scapula and first rib medially
Which arteries does the third part of the axillary nerve supply?
posterior circumflex humeral artery
anterior circumflexhumeral artery
it has just as many branches as it part name
three muscles attach
short head od the biceps brachii
pierxces the coracobrachialis muscle .
It is the most lateral terminal branch of the brachial plexus
What does the posterior cord of the brachial plexus give rise to ?
The upper and lower subclavian nerve
then terminates as the axillary and radial nerves
What is special about the radial nerve?
only sensory and motor nerve to the posterior compartment of the upper limb