Axillary Fossa Flashcards
Up and down
Up: Subclavian artery
Down: Axillary sheath (Vagina axillaries)
Up: Anterior Axillary fold
Down:Posterior Axillary fold
Apex and floor
Apex: (cervico-axillary canal)
Floor: Armpit skin &axillary fascia
Up: Costocoracoid membrane
Down: Axillary membrane
What’s at the Anterior wall of Axillary fossa
Clavipectoral fascia
Up: Costocoracoid ligament
Down left to right: Suspensory lig of axilla(pulls skin up), Pectoralis minor, Costocoracoid memb, Pectoralis major.
Up: Subscapularis
Down: Latismus dorsi
Right up: Pectoralis major
Right down: Pectoralis minor
Arrow: Serattus Anterior
Left: Intertubercular groove of humerus
Left up: Short head of bicep
Left down: Long head of bicep
Down: Cords of brachial plexus
Axilla content
Axillary a-v-lymph nodes
Cords of brachial plexus
Biceps-coracobrachialis
Loose connective tissue
Axillarysheath (cont. w prevertebral fascia)
Axillary process of breast – tail of Spence
Branches from intercostal nerves
Up: Cephalic vein
Down: Lateral pectoral nerve
Subclavian vein
Catheterisation for central venous pressure
Part of Axillary Artery
Branch 1– Above muscle
Branch 2– Below muscle
Branch 3
Branch 1 of Axillary artery
Superior (highest)(supreme) thoracic a
Branch 2 of Axillary artery
Thoraco-acromial trunk
pectoral, acromial, clavicular, deltoid brr
Lateral thoracic a
Branch 3 of Axillary artery
Anterior circumflexhumeral a
Posterior circumflexhumeral a
Subscapular a (thickest branch)
Thorocodorsal a
Circumflex scapular a
Right
Up: Superior thoracic artery
Down: Coracoacromial trunk
Left
Up: Subscapular artery
Under: CIrcumflex lateral artery
Down: Thoracodorsal artery
What is the scapular network
Rete scapulae
Up to down
Subclavian artery, superior thoracic artery, lateral thoracic artery, Long thoracic nerve, Serratus anterior muscle
Right: Branches to breast
Left: Lateral mammary artery
Right: Branches to breast
Left: Lateral mammary artery
Down left to right (Axillary spaces)
Medial/ Triangular space
Quadrangular/ Lateral space
Triangular interval transmitting: Anastomotic atery and exposing radial nerve
Cephalic vein
Right: Ariolar vein
Left: Thorcoaxillary
AxillaryVeinTributaries
Subscapular v
Circumflex scapular v
Thoracodorsal v
Anterior humeral circumflex v
Posterior humeral circumflex v
Lateral thoracic v
Thoraco-epigastric vv
Areolar vv
Cephalic v
Drainage of subclavian trunk (right)
Jugular trunk
Subclavian trunk
Left superior intercostal vein
Drainage of subclavian trunk (left)
Jugular trunk
Subclavian trunk
Superior vena cava
Left and right
Left: Anterior axillary lymph nodes
Right: Posterior axillary lymph nodes
Lateral group of axillary lymph nodes
Sentinel Lymph node dissection
If you remove the mass you inject a dye around the location of the mass through lymphatics the dye goes to 1 of the axillary nodes. Next, you dissect the axilla. If you find cancer cells in axillary lymph node– dissect more. If not– treated. Node where dye goes is called sentinel node.
What is the network of nerves in the Axilla
Brachial plexus
What happens if during birth if you pull the head laterally too much?
The upper cords of the brachial plexus will be damaged. Known as Fetal dystocia
What forms the spinal nerve?
Dorsal- Ventral root and Spinal cord
Right:
Spinal cord
Dorsal root (ganglion)
Ventral root
Left: (spinal nerve division)
Dorsal ramus
Ventral ramus
What forms a plexus?
Ventral rami (before intervening body parts)
Dorsal rami doesnt
What plexuses does the ventral rami form?
Cervical plexus,Lumbar plexus and sacral plexus
Do thoracal spinal nerve form plexuses?
No
Number of pairs of spinal cord? (spinal nerves)
C8
T12
L5
S5
Co1
31 spinal nerves
Skin area of pair of spinal nerves
Dermatomes
Sensory areas foreachpair of spinal nerves
Usually parallel to each other
Roots
Between scalene muscles
Trunks
Posterior triangle of neck
Division
Behind clavicle