SA: VANS

Questions and Answers

List the five main veins in the canine.

Accessory v., cephalic v., median v. , median cubital v, and brachial v.

Match to correct vein drainage

Accessory cephalic v. = Drains into cephalic Cephalic v. = External jugular Median v. = Drains into both median cubital and brachial b. Free bee = Free bee

How many branches branch off the axillary artery in the canine?

4 (correct)

What does the external thoracic artery supply?

Superficial pectoral Signup and view all the answers

What does the lateral thoracic artery supply? Select all that apply

Latissimus dorsi Signup and view all the answers

What are the two branches of the subscapular artery?

The two branches are the Thoracodorsal artery and the caudal circumflex humeral artery. Signup and view all the answers

What does the Thoracodorsal artery supply? (Select all that apply)

Teres major Signup and view all the answers

What does the caudal circumflex humeral artery supply? (Select all that apply)

Muscles of shoulder Signup and view all the answers

What does the cranial circumflex humeral artery supply?

Cranial aspect of shoulder Signup and view all the answers

List the branches of the Brachal artery in correct order

Deep brachial a., bicipital a. , collateral ulnar a., transverse cubital a., common interosseous a. Signup and view all the answers

What does the deep brachial artery supply?

Triceps brachii Signup and view all the answers

What does the bicipital artery supply?

Biceps brachii muscle Signup and view all the answers

What does the collateral ulnar artery supply?

Caudal elbow Signup and view all the answers

What does the transverse cubital artery supply?

Cranial elbow Signup and view all the answers

What does the common interosseous artery supply?

It has three branches that supply the antebrachium Signup and view all the answers

Which artery signifies the end of the brachial artery and the beginning of the median artery?

Common interosseous a. Signup and view all the answers

Put these arteries in order: subclavian, brachial, axillary, median.

Subclavian, axillary, brachial, median. Signup and view all the answers

What would happen if you blocked the axillary nerve?

You would not be able to flex the shoulder, i.e., deltoideus, teres major, and teres minor. Signup and view all the answers

Which artery offers principal blood supply to the manus?

Median a. Signup and view all the answers

Which nerve innervates the flexors of the manus and the pronator teres and quadratus?

Median n. Signup and view all the answers

What are the three branches of the subscapular artery and what is the subscapular artery a branch off of?

Thoracodorsal, subscapular, and caudal circumflex humeral; brachial artery. Signup and view all the answers

What nerve innervates the latissimus dorsi and what artery supplies blood to it?

Thoracodorsal a and n. Signup and view all the answers

Which nerve is responsible for the panniculus reflex and what muscle is it innervating?

Lateral thoracic n.; Cutaneous trunci. Signup and view all the answers

Which nerve and artery run close to the prescapular lymph node?

Lateral thoracic n. and artery. Signup and view all the answers

What spinal nerves make up the brachial plexus?

C6-T2. Signup and view all the answers

What bony prominence protects the suprascapular nerve in the dog?

Acromion. Signup and view all the answers

Which nerve innervates the triceps brachii?

Radial n. Signup and view all the answers

Can a dog put weight on a limb that has had its radial nerve cut in the brachial plexus?

False Signup and view all the answers

Which nerve(s) supply sensory innervation to the palmar aspect of the paw?

Median n. Signup and view all the answers

Which nerves innervate the humero radioulnar joint? (Sensory or motor?)

Median, ulnar, musculocutaneous, radial. Signup and view all the answers

Which nerve allows a dog to feel a pin prick in its dorsal manus?

Radial n. Signup and view all the answers

Which two muscles will you find the axillary nerve in between?

Subscapular and teres major muscle. Signup and view all the answers

Which nerve will innervate the coracobrachialis, and what other muscles will it innervate?

Musculocutaneous n. (biceps brachii and brachialis). Signup and view all the answers

Which artery signifies the end of the brachial artery and the beginning of the median artery?

Common interosseous. Signup and view all the answers

The caudal pectoral nerve innervates the superficial pectoral muscles.

False Signup and view all the answers

What muscle does the suprascapular nerve innervate?

Supraspinatus muscle Signup and view all the answers

Which nerve runs near the medial epicondyle and olecranon?

Ulnar nerve Signup and view all the answers

Which nerve is responsible for the innervation of the latissimus dorsi muscle?

Thoracodorsal nerve Signup and view all the answers

What action is primarily facilitated by the musculocutaneous nerve?

Flexion of the elbow Signup and view all the answers

Which nerve branches with the median nerve and is associated with flexing the carpus and digits?

Ulnar nerve Signup and view all the answers

Where does the radial nerve provide somatic sensory innervation in the forelimb of the canine?

Dorsal manus, and the skin of the lateral and cranial antebrachium Signup and view all the answers

Which muscle(s) does the radial nerve provide somatic motor innervation to?

ECLU mm. Signup and view all the answers

What muscles does the radial nerve provide somatic motor innervation to?

ECLU muscles, tensor fascia antebrachi, triceps brachii, aconeus, and supinator mm. Signup and view all the answers

The thoracodorsal nerve provides sensory function to the ventral aspect of the thorax and abdomen

False Signup and view all the answers

What nerve provides sensory function to the lateral shoulder?

Axillary nerve Signup and view all the answers

The suprascapular nerve provides sensory innervation to the glenohumeral joint

True Signup and view all the answers

Study Notes

Nerve and Artery Order

Order of arteries: subclavian, axillary, brachial, median.

Impact of Axillary Nerve Blockage

Blocking the axillary nerve prevents shoulder flexion, affecting the deltoideus, teres major, and teres minor muscles.

Blood Supply to the Manus

The median artery serves as the principal blood supply to the manus.

Nerve Innervation for Flexors and Pronators

The median nerve innervates the flexors of the manus, including the pronator teres and pronator quadratus.

Subscapular Artery Branches and Origin

The subscapular artery has three branches: thoracodorsal, subscapular, and caudal circumflex humeral. It branches off the brachial artery.

Innervation and Blood Supply for Latissimus Dorsi

The thoracodorsal nerve innervates the latissimus dorsi muscle, which receives blood supply from the thoracodorsal artery.

Panniculus Reflex

The lateral thoracic nerve is responsible for the panniculus reflex, innervating the cutaneous trunci muscle.

Nerve and Artery Near Prescapular Lymph Node

The lateral thoracic nerve and artery run close to the prescapular lymph node; however, the artery predominantly supplies the deep pectoral muscle.

Brachial Plexus Composition

The brachial plexus is formed from the ventral branches of spinal nerves C6 to T2.

Protection of Suprascapular Nerve

The acromion bony prominence protects the suprascapular nerve in dogs.

Triceps Brachii Innervation

The radial nerve innervates the triceps brachii muscle.

Weight Bearing After Radial Nerve Injury

After a radial nerve cut in the brachial plexus, a dog cannot bear weight on the affected limb.

Sensory Innervation to the Palmar Paw

The median nerve supplies sensory innervation to the palmar aspect of the paw.

Innervation of Humeroulnar Joint

The median, ulnar, musculocutaneous, and radial nerves innervate the humeroradioulnar joint, providing both sensory and motor functions.

Dorsal Manus Sensation

The radial nerve enables a dog to perceive a pin prick on its dorsal manus.

Axillary Nerve Muscle Association

The axillary nerve is situated between the subscapular muscle and the teres major muscle.

Coracobrachialis Innervation

The musculocutaneous nerve innervates the coracobrachialis muscle, as well as the biceps brachii and brachialis muscles.

Transition from Brachial to Median Artery

The common interosseous artery indicates the transition from the brachial artery to the median artery, also supplying the pronator quadratus.

Caudal Pectoral Nerve Functionality

False assertion: the caudal pectoral nerve innervates the deep pectoral muscle, not the superficial pectoral muscles.

Cranial and Caudal Pectoral Nerves

Cranial pectoral nerves innervate the superficial pectoral muscle.
Caudal pectoral nerves provide innervation to the deep pectoral muscle.

Lateral Thoracic Nerve

Supplies the cutaneous trunci muscle.
Located adjacent to the axillary lymph node.

Suprascapular Nerve

Positioned between the supraspinatus and subscapularis muscles.
Responsible for the innervation of the muscles in this region.

Subscapular Nerve

Directly innervates the subscapularis muscle.
Plays a role in shoulder movements.

Musculocutaneous Nerve

Primarily innervates the brachialis muscle.
Involved in flexion at the elbow joint.

Axillary Nerve

Provides motor function to teres major and subscapularis muscles.
Responsible for shoulder flexion.

Thoracodorsal Nerve

Innervates the latissimus dorsi muscle.
Important for shoulder extension and retraction.

Radial Nerve

Innervates the triceps brachii muscle.
Located near the deep brachial artery, involved in extending the elbow.

Median Nerve

Runs alongside the median artery and vein.
Responsible for flexing the carpus and digits.

Ulnar Nerve

Found between the medial epicondyle and olecranon.
Facilitates flexion of the carpus and digits, branches with the median nerve for combined function.

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Description

Identify muscles of arterial supply, innervation , veins and drainage of veins.