Podcast
Questions and Answers
Which structures pass through the quadrangular space?
Which structures pass through the quadrangular space?
- Circumflex scapular artery and radial nerve
- Axillary nerve and profunda brachii artery
- Radial nerve and posterior circumflex artery
- Axillary nerve and posterior circumflex artery (correct)
What artery travels with the radial nerve through the triceps hiatus (medial to the humerus)?
What artery travels with the radial nerve through the triceps hiatus (medial to the humerus)?
- Brachial artery
- Profunda brachii artery (correct)
- Superior thoracic artery
- Axillary artery
The axillary artery becomes the brachial artery at which anatomical landmark?
The axillary artery becomes the brachial artery at which anatomical landmark?
- Medial border of the pectoralis minor muscle
- Lower border of the teres major muscle (correct)
- Inferior border of the clavicle
- Lateral border of the first rib
Which muscle divides the axillary artery into three parts?
Which muscle divides the axillary artery into three parts?
Which artery supplies the pectoral, acromial, clavicular, and deltoid regions?
Which artery supplies the pectoral, acromial, clavicular, and deltoid regions?
Which of the following arteries contributes significantly to the blood supply of the breast?
Which of the following arteries contributes significantly to the blood supply of the breast?
What is the largest branch of the axillary artery?
What is the largest branch of the axillary artery?
Which arteries form an anastomotic circle around the surgical neck of the humerus?
Which arteries form an anastomotic circle around the surgical neck of the humerus?
Through which anatomical space does the posterior circumflex humeral artery extend?
Through which anatomical space does the posterior circumflex humeral artery extend?
A surgeon ligates the axillary artery at its first part. What is the most likely consequence she would have to consider?
A surgeon ligates the axillary artery at its first part. What is the most likely consequence she would have to consider?
Flashcards
Quadrangular Space
Quadrangular Space
Transmits the axillary nerve and posterior circumflex artery.
Triceps Hiatus
Triceps Hiatus
Transmits the radial nerve and profunda brachii artery.
Triangular Space
Triangular Space
Passes the circumflex scapular branch of the subscapular artery.
Axillary Artery
Axillary Artery
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Axillary Artery transition
Axillary Artery transition
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Axillary Artery Divisions
Axillary Artery Divisions
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Superior Thoracic Artery
Superior Thoracic Artery
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Thoracoacromial Artery
Thoracoacromial Artery
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Lateral Thoracic Artery
Lateral Thoracic Artery
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Subscapular Artery
Subscapular Artery
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Study Notes
- The configuration of the muscles below the shoulder allows structures to pass from the axilla and arm's anterior to posterior regions.
Quadrangular Space
- Transmits the axillary nerve and posterior circumflex artery.
Triceps Hiatus
- Located medial to the humerus shaft.
- Transmits the radial nerve and profunda brachii artery.
Triangular Space
- Inferior to the quadrangular space.
- Passes the circumflex scapular branch of the subscapular artery.
Axillary Artery
- A continuation of the subclavian artery.
- Begins at the lateral edge of the first rib.
- Becomes the brachial artery as it passes the lower border of the teres major.
- Divided into 3 parts by the overlying pectoralis minor muscle.
- There's an equivalent number of branches to divisions.
Branches of the Axillary Artery (First Part)
- Superior thoracic artery supplies the pectoralis major and minor muscles.
Branches of the Axillary Artery (Second Part)
- Thoracoacromial artery is a short trunk.
- Supplies pectoral, acromial, clavicular, and deltoid regions.
- Lateral thoracic artery contributes to the breast.
Branches of the Axillary Artery (Third Part)
- Subscapular artery is the largest branch of the axillary artery.
- Gives rise to muscular branches that form an anastomosis around the scapula.
- Anterior and posterior circumflex humeral arteries form an anastomotic circle around the humerus' surgical neck.
- The posterior extends through the quadrangular space with the axillary nerve to supply the shoulder joint and surrounding muscles.
- The anterior is small.
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Description
An overview of the upper limb, detailing the quadrangular, triceps hiatus, and triangular spaces. It also explains the axillary artery's path and its division into three parts, each supplying branches to the surrounding muscles.
