Back/Shoulder/Axilla

Which muscle is innervated by the long thoracic nerve?

A. Rhomboid major
B. Levator scapulae
C. Serratus anterior
D. Teres major

Serratus anterior

The long thoracic nerve is formed from which spinal nerve roots?

A. C3-C5
B. C4-C6
C. C5-C7
D. C6-T1

C5-C7

Injury to the long thoracic nerve results in:

A. Wrist drop
B. Ape hand
C. Claw hand
D. Winged scapula

Winged scapula

Which nerve innervates rhomboid major, rhomboid minor, and levator scapulae?

A. Long thoracic nerve
B. Dorsal scapular nerve
C. Ulnar nerve
D. Radial nerve

Dorsal scapular nerve

The dorsal scapular nerve primarily arises from:

A. C5
B. C6
C. C7
D. T1

C5

Levator scapulae receives additional innervation from:

A. C1-C2
B. C3-C4
C. T1-T2
D. C8-T1

C3-C4

Which muscle belongs to the Latissimus Group?

A. Deltoid
B. Supraspinatus
C. Subscapularis
D. Rhomboid minor

Subscapularis

The thoracodorsal nerve innervates:

A. Teres major
B. Subscapularis
C. Latissimus dorsi
D. Deltoid

Latissimus dorsi

The thoracodorsal nerve is also called the:

A. Upper subscapular nerve
B. Middle subscapular nerve
C. Lower subscapular nerve
D. Axillary nerve

Middle subscapular nerve

Which nerve innervates teres major?

A. Upper subscapular nerve
B. Axillary nerve
C. Lower subscapular nerve
D. Radial nerve

Lower subscapular nerve

Subscapularis is innervated by:

A. Axillary nerve only
B. Thoracodorsal nerve only
C. Upper and lower subscapular nerves
D. Suprascapular nerve

Upper and lower subscapular nerves

The common innervation for the deltoid group is the:

A. Radial nerve
B. Suprascapular nerve
C. Axillary nerve
D. Musculocutaneous nerve

Axillary nerve

Which muscles make up the deltoid group?

A. Deltoid and teres major
B. Deltoid and teres minor
C. Deltoid and supraspinatus
D. Deltoid and infraspinatus

Deltoid and teres minor

The axillary nerve contains fibers from:

A. C5-C6
B. C6-C7
C. C7-C8
D. C8-T1

C5-C6

Which nerve innervates the spinatus group?

A. Axillary nerve
B. Dorsal scapular nerve
C. Suprascapular nerve
D. Radial nerve

Suprascapular nerve

Which muscle initiates abduction of the arm?

A. Deltoid
B. Teres minor
C. Supraspinatus
D. Infraspinatus

Supraspinatus

Infraspinatus is innervated by the:

A. Axillary nerve
B. Radial nerve
C. Suprascapular nerve
D. Ulnar nerve

Suprascapular nerve

Which muscles form the rotator cuff?

A. Deltoid, teres major, latissimus dorsi, supraspinatus
B. Supraspinatus, infraspinatus, teres minor, subscapularis
C. Deltoid, supraspinatus, infraspinatus, teres major
D. Teres major, teres minor, deltoid, subscapularis

Supraspinatus, infraspinatus, teres minor, subscapularis

The rotator cuff mnemonic "SITS" stands for:

A. Supraspinatus, Infraspinatus, Teres minor, Subscapularis
B. Supraspinatus, Infraspinatus, Teres major, Serratus anterior
C. Subscapularis, Infraspinatus, Teres minor, Serratus anterior
D. Supraspinatus, Infraspinatus, Trapezius, Subscapularis

Supraspinatus, Infraspinatus, Teres minor, Subscapularis

The axilla is best described as a:

A. Cuboidal space
B. Cone-shaped space
C. Pyramidal space
D. Cylindrical space

Pyramidal space

Which muscles form the anterior wall of the axilla?

A. Latissimus dorsi and teres major
B. Pectoralis major and pectoralis minor
C. Serratus anterior and subscapularis
D. Deltoid and teres minor

Pectoral’s major and pectoral’s minor

Which muscle forms the medial wall of the axilla?

A. Deltoid
B. Subscapularis
C. Serratus anterior
D. Latissimus dorsi

Serratus anterior

Which structure is a content of the axilla?

A. Femoral nerve
B. Obturator artery
C. Brachial plexus
D. Sciatic nerve

Brachial plexus

The axillary artery is a continuation of the:

A. Brachial artery
B. Subclavian artery
C. Radial artery
D. Vertebral artery

Subclavian artery

The axillary artery becomes the brachial artery at the:

A. Pectoralis minor
B. Teres major
C. Deltoid tuberosity
D. First rib

Teres major

The first part of the axillary artery gives rise to the:

A. Lateral thoracic artery
B. Superior thoracic artery
C. Subscapular artery
D. Circumflex scapular artery

Superior thoracic artery

The second part of the axillary artery gives rise to the:

A. Superior thoracic artery
B. Circumflex humeral arteries
C. Thoracoacromial and lateral thoracic arteries
D. Deep brachial artery

Thoracoacromial and lateral thoracic arteries

Which artery is a branch of the third part of the axillary artery?

A. Thyrocervical trunk
B. Superior thoracic artery
C. Subscapular artery
D. Dorsal scapular artery

Subscapular artery

Which artery passes through the quadrangular space with the axillary nerve?

A. Circumflex scapular artery
B. Posterior circumflex humeral artery
C. Thoracodorsal artery
D. Dorsal scapular artery

Posterior circumflex humeral artery

The triangular space contains the:

A. Axillary nerve
B. Radial nerve
C. Circumflex scapular artery
D. Median nerve

Circumflex scapular artery

What does RTCN stand for in the brachial plexus?

A. Radial, Thoracic, Cord, Nerve
B. Roots, Trunks, Divisions, Cords, Nerves
C. Roots, Tendons, Divisions, Cords, Nerves
D. Roots, Trunks, Cords, Nerves, Divisions

Roots, Trunks, Divisions, Cords, Nerves

The mnemonic "Real Tired Drink Coffee Now" helps remember:

A. Rotator cuff muscles
B. Axillary artery branches
C. Organization of the brachial plexus
D. Scapular anastomoses

Organization of the brachial plexus

The roots of the brachial plexus are:

A. Dorsal roots C1-T1
B. Ventral rami C5-T1
C. Ventral roots C5-T1
D. Dorsal rami C5-T1

Ventral rami C5-T1

Which terminal branch contains fibers from C8-T1 only?

A. Axillary nerve
B. Radial nerve
C. Median nerve
D. Ulnar nerve

Ulnar nerve

The medial brachial and antebrachial nerves are primarily:

A. Motor nerves
B. Mixed nerves
C. Cutaneous nerves
D. Autonomic nerves

Cutaneous nerves

Which terminal nerve contains fibers from C5-T1?

A. Axillary nerve
B. Ulnar nerve
C. Median nerve
D. Long thoracic nerve

Median nerve

Which terminal nerve contains fibers from C5-C7?

A. Musculocutaneous nerve
B. Ulnar nerve
C. Axillary nerve
D. Radial nerve

Musculocutaneous nerve

Which terminal branch contains fibers from all roots (C5-T1)?

A. Ulnar nerve
B. Axillary nerve
C. Radial nerve
D. Long thoracic nerve

Radial nerve

What are the five major terminal branches of the brachial plexus?

A. Musculocutaneous, Axillary, Radial, Median, Ulnar
B. Axillary, Radial, Suprascapular, Ulnar, Median
C. Median, Ulnar, Radial, Long thoracic, Axillary
D. Radial, Median, Ulnar, Dorsal scapular, Axillary

Musculocutaneous, Axillary, Radial, Median, Ulnar

The ventral rami of C5 and C6 combine to form which trunk?

A. Inferior trunk
B. Superior trunk
C. Middle trunk
D. Posterior trunk

Superior trunk

Which spinal nerve continues as the middle trunk?

A. C5
A. C6
C. C7
D. C8

C7

The inferior trunk is formed by which roots?

A. C6-C7
B. C7-C8
C. C8-T1
D. T1-T2

C8-T1

Each trunk divides into:

A. Medial and lateral divisions
B. Anterior and posterior divisions
C. Superior and inferior divisions
D. Internal and external divisions

Anterior and posterior divisions

Which cord receives all posterior divisions?

A. Lateral cord
B. Medial cord
C. Posterior cord
D. Superior cord

Posterior cord

The lateral cord is formed from:

A. All anterior divisions
B. Posterior divisions of all trunks
C. Anterior divisions of the superior and middle trunks
D. Anterior division of the inferior trunk

Anterior divisions of the superior and middle trunks

The medial cord is formed from:

A. All posterior divisions
B. Superior trunk anterior division
C. Inferior trunk anterior division
D. Middle trunk posterior division

Inferior trunk anterior division

The cords are named according to their relationship to the:

A. Subclavian vein
B. Median nerve
C. Axillary artery
D. Axillary vein

Axillary artery

Which terminal branch forms the lateral side of the "M" in the axilla?

A. Ulnar nerve
B. Median nerve
C. Musculocutaneous nerve
D. Radial nerve

Musculocutaneous nerve

Which terminal branch is the major nerve of the posterior arm and forearm?

A. Ulnar nerve
B. Median nerve
C. Radial nerve
D. Axillary nerve

Radial nerve

Which nerve provides cutaneous sensation to the medial forearm?

A. Ulnar nerve
B. Median nerve
C. Medial antebrachial cutaneous nerve
D. Radial nerve

Medial antebrachial cutaneous nerve

Which nerve provides cutaneous sensation to the medial arm?

A. Musculocutaneous nerve
B. Axillary nerve
C. Medial brachial cutaneous nerve
D. Radial nerve

Medial brachial cutaneous nerve

Which cord gives rise to the upper, middle, and lower subscapular nerves?

A. Lateral cord
B. Medial cord
C. Posterior cord
D. Median nerve

Posterior cord