The Axilla: PAS407 UPDATED ACTUAL Questions and CORRECT Answers
-pyramidal region found deep to the shoulder region
the axilla -gateway for many structures passing from the neck to the
upper limb
1. superior
2. anterior
what are the 4 boundaries of the axilla?
3. posterior
4. medial
-location of the apex of the pyramid
-bony boundary formed by the clavicle, 1st rib, and scapu-
superior boundary of the axilla
la
-passage for structures passing between neck and axilla
-wall formed by the pectoral region of the shoulder
-border ends inferiorly at the anterior axillary fold
anterior border of the axilla
-formed by the lateral border of the pectoralis major mus-
cle
-wall formed by the body of the scapula, associated scapu-
lohumeral muscles, and latissimus dorsi muscle
posterior boundary of the axilla -border ends inferiorly with the posterior axillary fold
-composed of both latissimus dorsi and teres major mus-
cles
- formed by the lateral border of rib cage and overlying
medial border of the axilla
musculature
which muscle is the most superficial portion of the medial
serratus anterior muscle
wall of the axilla
origin: ribs 1-8 serratus anterior muscle
insertion: wraps posteriorly to insert on medial border of origin:
the scapula insertion:
action:
, innervation:
action: contracts to protract the scapula (pull arm for- neurovascular supply:
ward)
innervation: long thoracic nerve
neurovascular supply: lateral thoracic artery
trauma resulting in paralysis of serratus anterior muscle
can result in ...
scapular winging in push up position (unable to hold
scapula flat against body wall)
during axillary surgeries
when can long thoracic nerve be damaged?
-can lead to paralysis of serratus anterior muscle
small boundary between the insertions of pectoralis ma-
lateral border of the axillary
jor, latissimus dorsi
-marked by the axillary fascia and overlying skin
-axillary fascial is continuous with pectoral fascia, suspen-
floor of the axillary
sory ligament pf the axilla anteriorly and with the fascia
surrounding the latissimus dorsi
-continuation of the subclavian artery as it passes the first
rib to enter the axilla
axillary artery
-divided into 3 regions according to proximity to pectoralis
minor muscle
superior thoracic artery what artery is in the first region of the axillary artery?
Thoracacromial trunk
- acromial branch
-pyramidal region found deep to the shoulder region
the axilla -gateway for many structures passing from the neck to the
upper limb
1. superior
2. anterior
what are the 4 boundaries of the axilla?
3. posterior
4. medial
-location of the apex of the pyramid
-bony boundary formed by the clavicle, 1st rib, and scapu-
superior boundary of the axilla
la
-passage for structures passing between neck and axilla
-wall formed by the pectoral region of the shoulder
-border ends inferiorly at the anterior axillary fold
anterior border of the axilla
-formed by the lateral border of the pectoralis major mus-
cle
-wall formed by the body of the scapula, associated scapu-
lohumeral muscles, and latissimus dorsi muscle
posterior boundary of the axilla -border ends inferiorly with the posterior axillary fold
-composed of both latissimus dorsi and teres major mus-
cles
- formed by the lateral border of rib cage and overlying
medial border of the axilla
musculature
which muscle is the most superficial portion of the medial
serratus anterior muscle
wall of the axilla
origin: ribs 1-8 serratus anterior muscle
insertion: wraps posteriorly to insert on medial border of origin:
the scapula insertion:
action:
, innervation:
action: contracts to protract the scapula (pull arm for- neurovascular supply:
ward)
innervation: long thoracic nerve
neurovascular supply: lateral thoracic artery
trauma resulting in paralysis of serratus anterior muscle
can result in ...
scapular winging in push up position (unable to hold
scapula flat against body wall)
during axillary surgeries
when can long thoracic nerve be damaged?
-can lead to paralysis of serratus anterior muscle
small boundary between the insertions of pectoralis ma-
lateral border of the axillary
jor, latissimus dorsi
-marked by the axillary fascia and overlying skin
-axillary fascial is continuous with pectoral fascia, suspen-
floor of the axillary
sory ligament pf the axilla anteriorly and with the fascia
surrounding the latissimus dorsi
-continuation of the subclavian artery as it passes the first
rib to enter the axilla
axillary artery
-divided into 3 regions according to proximity to pectoralis
minor muscle
superior thoracic artery what artery is in the first region of the axillary artery?
Thoracacromial trunk
- acromial branch
