Exam 3 - Thoracic Limb Circulation Flashcards
Where are the main arterial branches of the thoracic limb found?
on the caudomedial aspect of the limb
What set of veins do not have accompanying arteries?
the superficial set
How does the subclavian become the digital?
subclavian to axillary to brachial to median to digital
What is the axillary artery a continuation of?
the subclavian
Where does the axillary artery emerge?
from the cranial border of the first rib
What does the axillary artery cross?
the axillary space and enters the thoracic luimb
What does the axillary artery supply?
the shoulder
What are the branches of the axillary artery?
the external thoracic, lateral thoracic, subscapular artery, and cranial circumflex humeral artery
What does the external thoracic artery supply?
the pectoral muscles
What does the lateral thoracic artery supply?
latissimus dorsi
Where does the subscapular artery run?
caudal to the shoulder joint
What does the subscapular artery supply?
the shoulder joint, extensors and flexors of the elbow joint
What does the cranial circumflex humeral artery supply?
the brachialis and part of the triceps
When does the axillary artery become the brachial artery?
when the axillary gives off the cranial circumflex humeral
Where is the brachial artery located?
on the medial aspect of the humerus
What artery can the pulse be taken from?
the brachial artery
What does the brachial artery supply?
the brachium; branches supply the antebrachium and manus
What are the branches of the brachial artery?
deep brachial artery, bicipital artery, superficial antebrachial artery, collateral ulnar. transverse or median cubital, common interosseous artery
What does the deep brachial artery supply?
the triceps muscle
What does the bicipital artery supply?
the biceps muscle
What does the superficial antebrachial artery supply?
the skin over the dorsal aspect of the manus and digits
What does the collateral ulnar artery supply?
the elbow joint and caudomedial muscles of the antebrachium
What does the transverse or median cubital artery supply?
the carpal and digital extensors
Where does the common interosseous artery go?
into the interosseous space between the radius and the ulna
What are the branches of the common interosseous artery?
ulnar artery, cranial interosseous artery, caudal interosseus artery
Where does the caudal interosseous artery run?
between the interosseous membrane/muscle and pronator quadratus, through the carpal canal
What does the caudal interosseous artery supply?
the superficial and deep palmar arches
When does the brachial artery become the median artery?
when the brachial artery gives off the common interosseous artery
what is the main artery of the antebrachium and the manus?
the median artery
Where does the median artery course?
the deep face of the flexor carpi ulnaris in the antebrachial region
What are the branches of the median artery?
deep antebrachial artery and the radial artery
What does the deep antebrachial artery supply?
carpal and digital flexors
Where is the radial artery located?
on the medial aspect of the radius
What does the radial artery do at the carpus?
gives off a branch to the dorsal carpal rete and a palmar branch to join the caudal interosseous artery in forming the deep palmar arch
When is the superficial palmar arch created?
when the median artery continues through the carpal canal
What is the minor dorsal supply to the manus?
superficial set from the superficial brachial artery
deep set derived from the dorsal carpal rete
What forms the dorsal common digital arteries on the metacarpus?
the superficial antebrachial arteries (superficial structures)
What do the dorsal common digital arteries divide into?
the dorsal axial and abaxial proper digital arteries
What are the branches derived from the dorsal carpal rete?
the dorsal metacarpal arteries
What does the palmar aspect of the manus recieve blood supply from?
the superficial palmar arch and the deep palmar arch
Where is the superficial palmar arch located?
between the superficial digital flexor adn the deep digital flexor
What is the superficial palmar arch fromed by?
the median artery and the caudal interosseous
What does the superficial palmar arch give rise to?
palmar common digital arteries which further divide into the palmar axial and abaxial proper digital arteries
Where does the deep palmar arch lie?
deep to the interossei muscles
What is the deep palmar arch formed by?
a branch of the caudal interosseous and palmar branch of the radial artery
What gives rise to the palmar metacarpal arteries?
the fusion of the ulnar artery and the caudal interosseous artery in the carpal canal
A cut to what region causes a considerable haemorrhage?
the palmar manus
What does the superficial arrangement aid in?
diffusion of concussion and thermoregulation
Which set of veins follows the arteries of the thoracic limb?
the deep set
What is the superficial set of veins used for?
thermoregulation
What is the main superficial vein?
the cephalic vein
Where is the cephalic vein located?
on the cranial aspect of the antebrachium
What is the cephalic vein useful for?
blood sampling and intravenous injections
How does the cephalic vein run in order to feed into the external jugular?
proximally the cephalic runs deep to the brachiocephalicus
What is the omobrachial vein a branch off of?
the cephalic vein
Where does the omobrachial vein run?
superficial to the shoulder joint, over the greater tubercle of the humerus, and between the brachiocephalicus and the omotransversarius to join the external jugular
What is the function of the median cubital vein?
to connect the cephalic vein and the median vein on the flexor aspect of the elbow
What is the function of the axillobrachial vein?
connect the cephalic vein and the axillary vein on the medial aspect of the shoulder
