Anatomy test on pectoral girdle muscles

1. Which nerve innervates the deltoid muscle?

• Axillary nerve (n. axillaris)

  The deltoid muscle is innervated by the axillary nerve, which originates from the posterior cord of the brachial plexus.

• Suprascapular nerve (n. suprascapularis)

  The deltoid muscle is innervated by the axillary nerve, which originates from the posterior cord of the brachial plexus.

• Subscapular nerve (n. subscapularis)

  The deltoid muscle is innervated by the axillary nerve, which originates from the posterior cord of the brachial plexus.

• Musculocutaneous nerve (n. musculocutaneus)

  The deltoid muscle is innervated by the axillary nerve, which originates from the posterior cord of the brachial plexus.

• I find it difficult to answer

  The deltoid muscle is innervated by the axillary nerve, which originates from the posterior cord of the brachial plexus.

2. Which artery is the primary source of blood supply to the supraspinatus muscle?

• Thoracoacromial artery (a. thoracoacromialis)

  The supraspinatus muscle is supplied by the suprascapular artery, a branch of the thyrocervical trunk.

• Circumflex scapular artery (a. circumflexa scapulae)

  The supraspinatus muscle is supplied by the suprascapular artery, a branch of the thyrocervical trunk.

• Suprascapular artery (a. suprascapularis)

  The supraspinatus muscle is supplied by the suprascapular artery, a branch of the thyrocervical trunk.

• Posterior circumflex humeral artery (a. circumflexa humeri posterior)

  The supraspinatus muscle is supplied by the suprascapular artery, a branch of the thyrocervical trunk.

• I find it difficult to answer

  The supraspinatus muscle is supplied by the suprascapular artery, a branch of the thyrocervical trunk.

3. Which shoulder girdle muscle is innervated by the accessory nerve (n. accessorius)?

• Latissimus dorsi muscle

  The trapezius muscle receives motor innervation from the accessory nerve (cranial nerve XI) and sensory from the cervical plexus.

• Rhomboid major muscle

  The trapezius muscle receives motor innervation from the accessory nerve (cranial nerve XI) and sensory from the cervical plexus.

• Serratus anterior muscle

  The trapezius muscle receives motor innervation from the accessory nerve (cranial nerve XI) and sensory from the cervical plexus.

• Trapezius muscle

  The trapezius muscle receives motor innervation from the accessory nerve (cranial nerve XI) and sensory from the cervical plexus.

• I find it difficult to answer

  The trapezius muscle receives motor innervation from the accessory nerve (cranial nerve XI) and sensory from the cervical plexus.

4. From which cord of the brachial plexus does the thoracodorsal nerve (n. thoracodorsalis) originate, innervating the latissimus dorsi muscle?

• Lateral cord

  The thoracodorsal nerve is formed from the branches of the posterior cord of the brachial plexus (C6–C8).

• Posterior cord

  The thoracodorsal nerve is formed from the branches of the posterior cord of the brachial plexus (C6–C8).

• Medial cord

  The thoracodorsal nerve is formed from the branches of the posterior cord of the brachial plexus (C6–C8).

• Upper trunk

  The thoracodorsal nerve is formed from the branches of the posterior cord of the brachial plexus (C6–C8).

• I find it difficult to answer

  The thoracodorsal nerve is formed from the branches of the posterior cord of the brachial plexus (C6–C8).

5. Indicate the artery that passes through the quadrilateral space (foramen quadrilaterum) with the axillary nerve.

• Posterior circumflex humeral artery

  Through the quadrilateral space, the posterior circumflex humeral artery emerges on the posterior surface of the arm, supplying the deltoid muscle.

• Circumflex scapular artery

  Through the quadrilateral space, the posterior circumflex humeral artery emerges on the posterior surface of the arm, supplying the deltoid muscle.

• Deep brachial artery

  Through the quadrilateral space, the posterior circumflex humeral artery emerges on the posterior surface of the arm, supplying the deltoid muscle.

• Anterior circumflex humeral artery

  Through the quadrilateral space, the posterior circumflex humeral artery emerges on the posterior surface of the arm, supplying the deltoid muscle.

• I find it difficult to answer

  Through the quadrilateral space, the posterior circumflex humeral artery emerges on the posterior surface of the arm, supplying the deltoid muscle.

6. Which muscle is innervated by the same nerve as the deltoid muscle?

• Teres major muscle

  The axillary nerve (n. axillaris) innervates both the deltoid and teres minor muscles.

• Infraspinatus muscle

  The axillary nerve (n. axillaris) innervates both the deltoid and teres minor muscles.

• Subscapular muscle

  The axillary nerve (n. axillaris) innervates both the deltoid and teres minor muscles.

• Teres minor muscle

  The axillary nerve (n. axillaris) innervates both the deltoid and teres minor muscles.

• I find it difficult to answer

  The axillary nerve (n. axillaris) innervates both the deltoid and teres minor muscles.

7. Which nerve passes through the scapular notch (incisura scapulae) under the superior transverse scapular ligament?

• Dorsal scapular nerve

  The suprascapular nerve passes through the scapular notch under the ligament, while the homonymous artery passes above it.

• Suprascapular nerve

  The suprascapular nerve passes through the scapular notch under the ligament, while the homonymous artery passes above it.

• Subscapular nerve

  The suprascapular nerve passes through the scapular notch under the ligament, while the homonymous artery passes above it.

• Axillary nerve

  The suprascapular nerve passes through the scapular notch under the ligament, while the homonymous artery passes above it.

• I find it difficult to answer

  The suprascapular nerve passes through the scapular notch under the ligament, while the homonymous artery passes above it.

8. The primary source of blood supply to the serratus anterior muscle is:

• Internal thoracic artery

  The serratus anterior muscle is primarily supplied by the lateral thoracic artery and thoracodorsal artery.

• Thoracoacromial artery

  The serratus anterior muscle is primarily supplied by the lateral thoracic artery and thoracodorsal artery.

• Lateral thoracic artery

  The serratus anterior muscle is primarily supplied by the lateral thoracic artery and thoracodorsal artery.

• Superior thoracic artery

  The serratus anterior muscle is primarily supplied by the lateral thoracic artery and thoracodorsal artery.

• I find it difficult to answer

  The serratus anterior muscle is primarily supplied by the lateral thoracic artery and thoracodorsal artery.

9. Which nerve innervates the pectoralis major and minor muscles?

• Medial and lateral pectoral nerves

  The pectoralis major and minor muscles are innervated by nn. pectorales medialis et lateralis, originating from the corresponding cords of the brachial plexus.

• Long thoracic nerve

  The pectoralis major and minor muscles are innervated by nn. pectorales medialis et lateralis, originating from the corresponding cords of the brachial plexus.

• Intercostal nerves

  The pectoralis major and minor muscles are innervated by nn. pectorales medialis et lateralis, originating from the corresponding cords of the brachial plexus.

• Thoracodorsal nerve

  The pectoralis major and minor muscles are innervated by nn. pectorales medialis et lateralis, originating from the corresponding cords of the brachial plexus.

• I find it difficult to answer

  The pectoralis major and minor muscles are innervated by nn. pectorales medialis et lateralis, originating from the corresponding cords of the brachial plexus.

10. The circumflex scapular artery (a. circumflexa scapulae), passes through:

• Quadrangular space

  The circumflex scapular artery is a branch of the subscapular artery and passes through the triangular space to the dorsal surface of the scapula.

• Scapular notch

  The circumflex scapular artery is a branch of the subscapular artery and passes through the triangular space to the dorsal surface of the scapula.

• Spinoglenoid notch

  The circumflex scapular artery is a branch of the subscapular artery and passes through the triangular space to the dorsal surface of the scapula.

• Triangular foramen

  The circumflex scapular artery is a branch of the subscapular artery and passes through the triangular space to the dorsal surface of the scapula.

• I find it difficult to answer

  The circumflex scapular artery is a branch of the subscapular artery and passes through the triangular space to the dorsal surface of the scapula.

11. Which nerve innervates the levator scapulae muscle (m. levator scapulae) and the rhomboid muscles?

• Suprascapular nerve

  Dorsal scapular nerve (from short branches of the brachial plexus) innervates m. levator scapulae and mm. rhomboidei

• Dorsal scapular nerve

  Dorsal scapular nerve (from short branches of the brachial plexus) innervates m. levator scapulae and mm. rhomboidei

• Long thoracic nerve

  Dorsal scapular nerve (from short branches of the brachial plexus) innervates m. levator scapulae and mm. rhomboidei

• Subscapular nerve

  Dorsal scapular nerve (from short branches of the brachial plexus) innervates m. levator scapulae and mm. rhomboidei

• I find it difficult to answer

  Dorsal scapular nerve (from short branches of the brachial plexus) innervates m. levator scapulae and mm. rhomboidei

12. Indicate the muscle that is innervated by the long thoracic nerve (n. thoracicus longus).

• Latissimus dorsi muscle

  The long thoracic nerve descends along the outer surface of the serratus anterior muscle, providing its innervation.

• Pectoralis major muscle

  The long thoracic nerve descends along the outer surface of the serratus anterior muscle, providing its innervation.

• Serratus anterior muscle

  The long thoracic nerve descends along the outer surface of the serratus anterior muscle, providing its innervation.

• Subclavius muscle

  The long thoracic nerve descends along the outer surface of the serratus anterior muscle, providing its innervation.

• I find it difficult to answer

  The long thoracic nerve descends along the outer surface of the serratus anterior muscle, providing its innervation.

13. The formation of the scapular anastomotic circle (rete articulare) does NOT involve:

• Suprascapular artery

  The anterior circumflex humeral artery supplies the glenohumeral joint and deltoid muscle but does not participate in the scapular anastomosis.

• Circumflex scapular artery

  The anterior circumflex humeral artery supplies the glenohumeral joint and deltoid muscle but does not participate in the scapular anastomosis.

• Dorsal scapular artery

  The anterior circumflex humeral artery supplies the glenohumeral joint and deltoid muscle but does not participate in the scapular anastomosis.

• Anterior circumflex humeral artery

  The anterior circumflex humeral artery supplies the glenohumeral joint and deltoid muscle but does not participate in the scapular anastomosis.

• I find it difficult to answer

  The anterior circumflex humeral artery supplies the glenohumeral joint and deltoid muscle but does not participate in the scapular anastomosis.

14. The infraspinatus muscle (m. infraspinatus) receives its motor innervation from:

• Suprascapular nerve

  The suprascapular nerve, after passing through the scapular notch, innervates the supraspinatus muscle and then goes through the spinoglenoid notch towards the infraspinatus.

• Subscapular nerve

  The suprascapular nerve, after passing through the scapular notch, innervates the supraspinatus muscle and then goes through the spinoglenoid notch towards the infraspinatus.

• Axillary nerve

  The suprascapular nerve, after passing through the scapular notch, innervates the supraspinatus muscle and then goes through the spinoglenoid notch towards the infraspinatus.

• Dorsal scapular nerve

  The suprascapular nerve, after passing through the scapular notch, innervates the supraspinatus muscle and then goes through the spinoglenoid notch towards the infraspinatus.

• I find it difficult to answer

  The suprascapular nerve, after passing through the scapular notch, innervates the supraspinatus muscle and then goes through the spinoglenoid notch towards the infraspinatus.

15. The blood supply to the teres major muscle (m. teres major) is primarily provided by branches of the:

• Suprascapular artery

  The teres major muscle is supplied by the circumflex scapular artery and muscular branches from the subscapular artery itself.

• The subscapular artery

  The teres major muscle is supplied by the circumflex scapular artery and muscular branches from the subscapular artery itself.

• The thoracoacromial artery

  The teres major muscle is supplied by the circumflex scapular artery and muscular branches from the subscapular artery itself.

• Posterior circumflex humeral artery

  The teres major muscle is supplied by the circumflex scapular artery and muscular branches from the subscapular artery itself.

• I find it difficult to answer

  The teres major muscle is supplied by the circumflex scapular artery and muscular branches from the subscapular artery itself.

16. Which nerve innervates the subscapular muscle (m. subscapularis)?

• Subscapular nerve

  The subscapular nerve (a short branch of the brachial plexus) innervates the subscapular and teres major muscles.

• Thoracodorsal nerve

  The subscapular nerve (a short branch of the brachial plexus) innervates the subscapular and teres major muscles.

• Subscapular nerve

  The subscapular nerve (a short branch of the brachial plexus) innervates the subscapular and teres major muscles.

• Suprascapular nerve

  The subscapular nerve (a short branch of the brachial plexus) innervates the subscapular and teres major muscles.

• I find it difficult to answer

  The subscapular nerve (a short branch of the brachial plexus) innervates the subscapular and teres major muscles.

17. The subclavius muscle (m. subclavius) is innervated by:

• The subclavius nerve

  The subclavius nerve (n. subclavius) is a short branch of the supraclavicular part of the brachial plexus and innervates the muscle of the same name.

• The medial pectoral nerve

  The subclavius nerve (n. subclavius) is a short branch of the supraclavicular part of the brachial plexus and innervates the muscle of the same name.

• The lateral pectoral nerve

  The subclavius nerve (n. subclavius) is a short branch of the supraclavicular part of the brachial plexus and innervates the muscle of the same name.

• The suprascapular nerve

  The subclavius nerve (n. subclavius) is a short branch of the supraclavicular part of the brachial plexus and innervates the muscle of the same name.

• I find it difficult to answer

  The subclavius nerve (n. subclavius) is a short branch of the supraclavicular part of the brachial plexus and innervates the muscle of the same name.

18. The thoracodorsal artery (a. thoracodorsalis) is a terminal branch of:

• Lateral thoracic artery

  The thoracodorsal artery is a direct continuation of the subscapular artery after giving off the circumflex scapular artery.

• Thoracoacromial artery

  The thoracodorsal artery is a direct continuation of the subscapular artery after giving off the circumflex scapular artery.

• Axillary artery

  The thoracodorsal artery is a direct continuation of the subscapular artery after giving off the circumflex scapular artery.

• Subscapular artery

  The thoracodorsal artery is a direct continuation of the subscapular artery after giving off the circumflex scapular artery.

• I find it difficult to answer

  The thoracodorsal artery is a direct continuation of the subscapular artery after giving off the circumflex scapular artery.

19. The pectoral branch of the thoracoacromial artery (r. pectoralis a. thoracoacromialis) supplies:

• Serratus anterior muscle

  The pectoral branch descends between the pectoralis major and minor muscles, ensuring their adequate blood supply.

• Pectoralis major and minor muscles

  The pectoral branch descends between the pectoralis major and minor muscles, ensuring their adequate blood supply.

• Deltoid muscle

  The pectoral branch descends between the pectoralis major and minor muscles, ensuring their adequate blood supply.

• Subclavius muscle

  The pectoral branch descends between the pectoralis major and minor muscles, ensuring their adequate blood supply.

• I find it difficult to answer

  The pectoral branch descends between the pectoralis major and minor muscles, ensuring their adequate blood supply.

20. Which of the listed muscles is innervated by the muscular branches of the cervical plexus (C3-C4) and the accessory nerve?

• Rhomboid muscle

  The trapezius muscle has dual innervation: motor from the accessory nerve and sensory/proprioceptive from the branches of the cervical plexus.

• Levator scapulae

  The trapezius muscle has dual innervation: motor from the accessory nerve and sensory/proprioceptive from the branches of the cervical plexus.

• Trapezius muscle

  The trapezius muscle has dual innervation: motor from the accessory nerve and sensory/proprioceptive from the branches of the cervical plexus.

• Subscapular muscle

  The trapezius muscle has dual innervation: motor from the accessory nerve and sensory/proprioceptive from the branches of the cervical plexus.

• I find it difficult to answer

  The trapezius muscle has dual innervation: motor from the accessory nerve and sensory/proprioceptive from the branches of the cervical plexus.