Glenohumeral joint anatomy test

Test your knowledge of the Glenohumeral joint anatomy. The test covers the rotator cuff muscles, their topography, innervation zones, and blood supply.

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1. Which muscle is the primary abductor of the arm up to the horizontal level?

m. supraspinatus

The deltoid muscle is responsible for the primary abduction of the arm, taking over from the supraspinatus after the movement is initiated.
m. deltoideus

The deltoid muscle is responsible for the primary abduction of the arm, taking over from the supraspinatus after the movement is initiated.
m. coracobrachialis

The deltoid muscle is responsible for the primary abduction of the arm, taking over from the supraspinatus after the movement is initiated.
m. teres major

The deltoid muscle is responsible for the primary abduction of the arm, taking over from the supraspinatus after the movement is initiated.
I find it difficult to answer

The deltoid muscle is responsible for the primary abduction of the arm, taking over from the supraspinatus after the movement is initiated.

2. Which muscle attaches to the lesser tubercle of the humerus (tuberculum minus)?

m. subscapularis

The subscapularis muscle is the only rotator cuff muscle attaching to the lesser tubercle.
m. supraspinatus

The subscapularis muscle is the only rotator cuff muscle attaching to the lesser tubercle.
m. infraspinatus

The subscapularis muscle is the only rotator cuff muscle attaching to the lesser tubercle.
m. teres minor

The subscapularis muscle is the only rotator cuff muscle attaching to the lesser tubercle.
I find it difficult to answer

The subscapularis muscle is the only rotator cuff muscle attaching to the lesser tubercle.

3. What is the source of innervation for the m. supraspinatus?

n. axillaris

The suprascapular nerve passes through the scapular notch and innervates the supra- and infraspinatus muscles.
n. subscapularis

The suprascapular nerve passes through the scapular notch and innervates the supra- and infraspinatus muscles.
n. suprascapularis

The suprascapular nerve passes through the scapular notch and innervates the supra- and infraspinatus muscles.
n. thoracicus longus

The suprascapular nerve passes through the scapular notch and innervates the supra- and infraspinatus muscles.
I find it difficult to answer

The suprascapular nerve passes through the scapular notch and innervates the supra- and infraspinatus muscles.

4. Which artery passes through the quadrilateral space (foramen quadrilaterum)?

a. suprascapularis

The posterior circumflex humeral artery passes through this space along with the axillary nerve.
a. circumflexa humeri posterior

The posterior circumflex humeral artery passes through this space along with the axillary nerve.
a. circumflexa scapulae

The posterior circumflex humeral artery passes through this space along with the axillary nerve.
a. subscapularis

The posterior circumflex humeral artery passes through this space along with the axillary nerve.
I find it difficult to answer

The posterior circumflex humeral artery passes through this space along with the axillary nerve.

5. Which muscle's tendon passes directly through the glenohumeral joint cavity?

m. triceps brachii

The long head of the biceps brachii originates at the supra-glenoid tubercle and passes within the joint capsule.
m. coracobrachialis

The long head of the biceps brachii originates at the supra-glenoid tubercle and passes within the joint capsule.
m. deltoideus

The long head of the biceps brachii originates at the supra-glenoid tubercle and passes within the joint capsule.
m. biceps brachii (caput longum)

The long head of the biceps brachii originates at the supra-glenoid tubercle and passes within the joint capsule.
I find it difficult to answer

The long head of the biceps brachii originates at the supra-glenoid tubercle and passes within the joint capsule.

6. Which muscle facilitates internal rotation of the humerus?

m. subscapularis

The subscapularis muscle is a powerful internal rotator of the arm.
m. infraspinatus

The subscapularis muscle is a powerful internal rotator of the arm.
m. teres minor

The subscapularis muscle is a powerful internal rotator of the arm.
m. supraspinatus

The subscapularis muscle is a powerful internal rotator of the arm.
I find it difficult to answer

The subscapularis muscle is a powerful internal rotator of the arm.

7. Which nerve innervates the m. deltoideus?

n. suprascapularis

The axillary nerve (n. axillaris) is the main motor nerve for the deltoid muscle.
n. radialis

The axillary nerve (n. axillaris) is the main motor nerve for the deltoid muscle.
n. axillaris

The axillary nerve (n. axillaris) is the main motor nerve for the deltoid muscle.
n. musculocutaneus

The axillary nerve (n. axillaris) is the main motor nerve for the deltoid muscle.
I find it difficult to answer

The axillary nerve (n. axillaris) is the main motor nerve for the deltoid muscle.

8. Which muscle attaches to the lower edge of the greater tubercle of the humerus?

m. subscapularis

The teres minor muscle occupies the lowest position on the attachment sites of the greater tubercle.
m. teres minor

The teres minor muscle occupies the lowest position on the attachment sites of the greater tubercle.
m. supraspinatus

The teres minor muscle occupies the lowest position on the attachment sites of the greater tubercle.
m. deltoideus

The teres minor muscle occupies the lowest position on the attachment sites of the greater tubercle.
I find it difficult to answer

The teres minor muscle occupies the lowest position on the attachment sites of the greater tubercle.

9. Source of blood supply to m. infraspinatus from the a. subclavia?

a. Thoracica lateralis

The suprascapular artery anastomoses with the scapular circumflex artery, supplying the infraspinatus muscle.
a. profunda brachii

The suprascapular artery anastomoses with the scapular circumflex artery, supplying the infraspinatus muscle.
a. circumflexa humeri anterior

The suprascapular artery anastomoses with the scapular circumflex artery, supplying the infraspinatus muscle.
a. suprascapularis

The suprascapular artery anastomoses with the scapular circumflex artery, supplying the infraspinatus muscle.
I find it difficult to answer

The suprascapular artery anastomoses with the scapular circumflex artery, supplying the infraspinatus muscle.

10. Which muscle initiates abduction of the arm in the first 15 degrees?

m. supraspinatus

The supraspinatus muscle acts as a starter in abduction, after which the deltoid engages.
m. deltoideus

The supraspinatus muscle acts as a starter in abduction, after which the deltoid engages.
m. biceps brachii

The supraspinatus muscle acts as a starter in abduction, after which the deltoid engages.
m. Serratus anterior

The supraspinatus muscle acts as a starter in abduction, after which the deltoid engages.
I find it difficult to answer

The supraspinatus muscle acts as a starter in abduction, after which the deltoid engages.

11. Which bundle of the brachial plexus does the n. axillaris branch from?

Fasciculus medialis

The posterior bundle of the brachial plexus gives rise to the axillary and radial nerves.
Fasciculus lateralis

The posterior bundle of the brachial plexus gives rise to the axillary and radial nerves.
Fasciculus posterior

The posterior bundle of the brachial plexus gives rise to the axillary and radial nerves.
Fasciculus anterior

The posterior bundle of the brachial plexus gives rise to the axillary and radial nerves.
I find it difficult to answer

The posterior bundle of the brachial plexus gives rise to the axillary and radial nerves.

12. Which muscle limits the quadrilateral space from below?

m. teres minor

The teres major forms the lower border of the quadrilateral foramen.
m. teres major

The teres major forms the lower border of the quadrilateral foramen.
m. subscapularis

The teres major forms the lower border of the quadrilateral foramen.
m. triceps brachii

The teres major forms the lower border of the quadrilateral foramen.
I find it difficult to answer

The teres major forms the lower border of the quadrilateral foramen.

13. Which muscle performs external rotation of the shoulder?

m. subscapularis

The infraspinatus and teres minor provide supination (external rotation) of the shoulder.
m. latissimus dorsi

The infraspinatus and teres minor provide supination (external rotation) of the shoulder.
m. teres major

The infraspinatus and teres minor provide supination (external rotation) of the shoulder.
m. infraspinatus

The infraspinatus and teres minor provide supination (external rotation) of the shoulder.
I find it difficult to answer

The infraspinatus and teres minor provide supination (external rotation) of the shoulder.

14. Name the primary function of the m. coracobrachialis?

Flexion and adduction of the shoulder

The coracobrachialis flexes the shoulder and assists in its adduction to the torso.
Abduction and supination of the shoulder

The coracobrachialis flexes the shoulder and assists in its adduction to the torso.
Extension and pronation of the shoulder

The coracobrachialis flexes the shoulder and assists in its adduction to the torso.
Only internal rotation

The coracobrachialis flexes the shoulder and assists in its adduction to the torso.
I find it difficult to answer

The coracobrachialis flexes the shoulder and assists in its adduction to the torso.

15. Which artery is a branch of the a. axillaris in its subpectoral (third) part?

a. thoracica superior

The subscapular artery is the largest branch of the axillary artery and originates in the axillary fossa.
a. thoracoacromialis

The subscapular artery is the largest branch of the axillary artery and originates in the axillary fossa.
a. subscapularis

The subscapular artery is the largest branch of the axillary artery and originates in the axillary fossa.
a. Thoracica lateralis

The subscapular artery is the largest branch of the axillary artery and originates in the axillary fossa.
I find it difficult to answer

The subscapular artery is the largest branch of the axillary artery and originates in the axillary fossa.

16. What structure forms the lateral boundary of the triangular space?

m. teres major

The long head of the triceps divides the triangular and quadrilateral spaces, limiting the first laterally.
Caput longum m. triceps brachii

The long head of the triceps divides the triangular and quadrilateral spaces, limiting the first laterally.
Corpus humeri

The long head of the triceps divides the triangular and quadrilateral spaces, limiting the first laterally.
m. deltoideus

The long head of the triceps divides the triangular and quadrilateral spaces, limiting the first laterally.
I find it difficult to answer

The long head of the triceps divides the triangular and quadrilateral spaces, limiting the first laterally.

17. Of which artery is a branch circumflexa scapulae?

a. axillaris

The artery encircling the scapula is the direct continuation of the subscapular artery.
a. suprascapularis

The artery encircling the scapula is the direct continuation of the subscapular artery.
a. circumflexa humeri posterior

The artery encircling the scapula is the direct continuation of the subscapular artery.
a. subscapularis

The artery encircling the scapula is the direct continuation of the subscapular artery.
I find it difficult to answer

The artery encircling the scapula is the direct continuation of the subscapular artery.

18. Which muscle attaches to the middle of the greater tubercle of the humerus?

m. infraspinatus

The infraspinatus attaches to the middle facet of the greater tubercle of the humerus.
m. supraspinatus

The infraspinatus attaches to the middle facet of the greater tubercle of the humerus.
m. teres minor

The infraspinatus attaches to the middle facet of the greater tubercle of the humerus.
m. subscapularis

The infraspinatus attaches to the middle facet of the greater tubercle of the humerus.
I find it difficult to answer

The infraspinatus attaches to the middle facet of the greater tubercle of the humerus.

19. Which nerve innervates the m. teres major?

n. suprascapularis

The subscapular nerve innervates both its namesake muscle and the teres major muscle of the scapula.
n. axillaris

The subscapular nerve innervates both its namesake muscle and the teres major muscle of the scapula.
n. subscapularis

The subscapular nerve innervates both its namesake muscle and the teres major muscle of the scapula.
n. thoracodorsalis

The subscapular nerve innervates both its namesake muscle and the teres major muscle of the scapula.
I find it difficult to answer

The subscapular nerve innervates both its namesake muscle and the teres major muscle of the scapula.

20. Which artery anastomoses with the a. suprascapularis in the scapular region?

a. thoracodorsalis

The artery encircling the scapula enters a pronounced anastomosis with the suprascapular artery in the infraspinous fossa.
a. circumflexa scapulae

The artery encircling the scapula enters a pronounced anastomosis with the suprascapular artery in the infraspinous fossa.
a. circumflexa humeri anterior

The artery encircling the scapula enters a pronounced anastomosis with the suprascapular artery in the infraspinous fossa.
a. profunda brachii

The artery encircling the scapula enters a pronounced anastomosis with the suprascapular artery in the infraspinous fossa.
I find it difficult to answer

The artery encircling the scapula enters a pronounced anastomosis with the suprascapular artery in the infraspinous fossa.