Brachial Plexus - Multiple Choice Questions

ANATOMY AIIMS, GROSS ANATOMY, EMBRYOLOGY, NEUROANATOMY, MICROANATOMY, APPLIED/ CLINICAL ANATOMY

Multiple Choice Questions on Brachial Plexus

Which spinal nerves contribute to the formation of the brachial plexus?

a) C1-C4

b) C5-T1

c) T2-T6

d) T7-T12

Answer: b) C5-T1

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which brachial plexus trunk is formed by the fusion of the C5 and C6 spinal nerves?

a) Superior trunk

b) Middle trunk

c) Inferior trunk

d) Lateral trunk

Answer: a) Superior trunk

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following nerves innervates the deltoid muscle?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: d) Axillary nerve

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which brachial plexus cord is formed by the fusion of the anterior divisions of the superior and middle trunks?

a) Lateral cord

b) Medial cord

c) Posterior cord

d) Long thoracic cord

Answer: a) Lateral cord

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves is responsible for the motor innervation of the biceps brachii muscle?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Musculocutaneous nerve

Answer: d) Musculocutaneous nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which brachial plexus root(s) contribute(s) to the formation of the median nerve?

a) C5 and C6 only

b) C6 and C7 only

c) C5, C6, and C7

d) C8 and T1 only

Answer: c) C5, C6, and C7

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves supplies sensation to the lateral forearm?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Musculocutaneous nerve

Answer: d) Musculocutaneous nerve

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which brachial plexus cord is formed by the fusion of the posterior divisions of all three trunks?

a) Lateral cord

b) Medial cord

c) Posterior cord

d) Long thoracic cord

Answer: c) Posterior cord

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following nerves supplies sensation to the medial hand and digits 4 and 5?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: b) Ulnar nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves is responsible for the motor innervation of the triceps brachii muscle?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: c) Radial nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which brachial plexus root(s) contribute(s) to the formation of the ulnar nerve?

a) C7 and C8 only

b) C8 and T1 only

c) C7, C8, and T1

d) C6 and C7 only

Answer: c) C7, C8, and T1

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which of the following nerves supplies sensation to the lateral upper arm and posterior forearm?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Musculocutaneous nerve

Answer: c) Radial nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves supplies sensation to the lateral hand and digits 1-3?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: a) Median nerve

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which of the following muscles is innervated by the axillary nerve?

a) Deltoid

b) Biceps brachii

c) Brachioradialis

d) Triceps brachii

Answer: a) Deltoid

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which brachial plexus root(s) contribute(s) to the formation of the radial nerve?

a) C6 and C7 only

b) C7 and C8 only

c) C5, C6, and C7

d) C8 and T1 only

Answer: c) C5, C6, and C7

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which brachial plexus cord is responsible for the motor innervation of the extensor muscles of the forearm?

a) Lateral cord

b) Medial cord

c) Posterior cord

d) Long thoracic cord

Answer: c) Posterior cord

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves supplies sensation to the tip of the thumb and index finger?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: a) Median nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following nerves is responsible for the motor innervation of the muscles of the anterior forearm (except for the flexor carpi ulnaris and part of the flexor digitorum profundus)?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Musculocutaneous nerve

Answer: a) Median nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which brachial plexus root(s) contribute(s) to the formation of the musculocutaneous nerve?

a) C5 and C6 only

b) C7 and C8 only

c) C5, C6, and C7

d) C8 and T1 only

Answer: a) C5 and C6 only

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following nerves supplies sensation to the medial aspect of the hand and digits 4 and 5?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: b) Ulnar nerve

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which brachial plexus cord is responsible for the motor innervation of the muscles of the hand (except for the thenar eminence and the first two lumbricals)?

a) Lateral cord

b) Medial cord

c) Posterior cord

d) Long thoracic cord

Answer: b) Medial cord

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves is responsible for the motor innervation of the supinator muscle?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: c) Radial nerve

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which of the following nerves supplies sensation to the posterior aspect of the arm and forearm?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: c) Radial nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves is responsible for the motor innervation of the flexor carpi ulnaris and part of the flexor digitorum profundus muscles?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Musculocutaneous nerve

Answer: b) Ulnar nerve

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which brachial plexus root(s) contribute(s) to the formation of the axillary nerve?

a) C5 and C6 only

b) C7 and C8 only

c) C5, C6, and C7

d) C8 and T1 only

Answer: a) C5 and C6 only

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following nerves supplies sensation to the palmar aspect of the thumb, index finger, middle finger, and half of the ring finger?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Musculocutaneous nerve

Answer: a) Median nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which brachial plexus cord is responsible for the motor innervation of the flexor muscles of the arm (biceps brachii, brachialis, and coracobrachialis)?

a) Lateral cord

b) Medial cord

c) Posterior cord

d) Long thoracic cord

Answer: a) Lateral cord

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which of the following nerves supplies sensation to the skin over the deltoid muscle and the teres minor muscle?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: d) Axillary nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following brachial plexus nerves is responsible for the motor innervation of the triceps brachii muscle?

a) Axillary nerve

b) Median nerve

c) Radial nerve

d) Ulnar nerve

Answer: c) Radial nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves supplies sensation to the skin over the little finger and part of the ring finger?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: b) Ulnar nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which brachial plexus nerve provides motor innervation to the deltoid and teres minor muscles?

a) Axillary nerve

b) Median nerve

c) Radial nerve

d) Ulnar nerve

Answer: a) Axillary nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

The brachial plexus is formed by the union of which nerve roots?

a) C1-C5

b) C5-T1

c) T1-T5

d) C5-C8

Answer: b) C5-T1

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which of the following nerves supplies sensation to the skin over the lateral two-thirds of the dorsum of the hand?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: c) Radial nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following muscles is NOT innervated by the musculocutaneous nerve?

a) Biceps brachii

b) Coracobrachialis

c) Brachialis

d) Brachioradialis

Answer: d) Brachioradialis

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

The long thoracic nerve originates from which brachial plexus roots?

a) C5, C6, C7

b) C7-C8

c) T1-T2

d) T2-T3

Answer: a) C5, C6, C7

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following muscles is innervated by the dorsal scapular nerve?

a) Trapezius

b) Rhomboid major

c) Teres major

d) Supraspinatus

Answer: b) Rhomboid major

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which brachial plexus nerve provides motor innervation to the flexor pollicis longus muscle?

a) Median nerve

b) Radial nerve

c) Ulnar nerve

d) Axillary nerve

Answer: a) Median nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following brachial plexus nerves provides motor innervation to the extensor carpi radialis muscle?

a) Axillary nerve

b) Median nerve

c) Radial nerve

d) Ulnar nerve

Answer: c) Radial nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

The suprascapular nerve originates from which brachial plexus roots?

a) C5-C6

b) C7-C8

c) T1-T2

d) T2-T3

Answer: a) C5-C6

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves supplies sensation to the skin over the medial side of the forearm and hand?

a) Median nerve

b) Medial cutaneous nerve of forearm

c) Radial nerve

d) Axillary nerve

Answer: b) Medial cutaneous nerve of forearm

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which of the following nerves provides motor innervation to the teres minor muscle?

a) Radial nerve

b) Ulnar nerve

c) Axillary nerve

d) Musculocutaneous nerve

Answer: c) Axillary nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following muscles is innervated by the thoracodorsal nerve?

a) Latissimus dorsi

b) Serratus anterior

c) Pectoralis major

d) Subscapularis

Answer: a) Latissimus dorsi

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following brachial plexus nerves provides motor innervation to the flexor carpi ulnaris muscle?

a) Median nerve

b) Radial nerve

c) Ulnar nerve

d) Axillary nerve

Answer: c) Ulnar nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves provides motor innervation to the extensor digitorum muscle?

a) Median nerve

b) Radial nerve

c) Ulnar nerve

d) Axillary nerve

Answer: b) Radial nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following nerves provides motor innervation to the coracobrachialis muscle?

a) Musculocutaneous nerve

b) Axillary nerve

c) Median nerve

d) Radial nerve

Answer: a) Musculocutaneous nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following brachial plexus nerves provides motor innervation to the flexor digitorum profundus muscle?

a) Median nerve

b) Radial nerve

c) Ulnar nerve

d) Axillary nerve

Answer: c) Ulnar nerve and a) Median nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following brachial plexus nerves provides motor innervation to the pronator teres muscle?

a) Median nerve

b) Radial nerve

c) Ulnar nerve

d) Axillary nerve

Answer: a) Median nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following nerves provides motor innervation to the extensor carpi radialis muscles?

a) Median nerve

b) Radial nerve

c) Ulnar nerve

d) Axillary nerve

Answer: b) Radial nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following brachial plexus nerves provides innervation to the brachialis muscle?

a) Median nerve

b) Radial nerve

c) Ulnar nerve

d) Musculocutaneous nerve

Answer: d) Musculocutaneous nerve and b) Radial nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves provides sensory innervation to the skin over the medial aspect of the hand?

a) Median nerve

b) Ulnar nerve

c) Radial nerve

d) Axillary nerve

Answer: b) Ulnar nerve

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which of the following brachial plexus nerves provides motor innervation to the serratus anterior muscle?

a) Long thoracic nerve

b) Dorsal scapular nerve

c) Suprascapular nerve

d) Subscapular nerve

Answer: a) Long thoracic nerve

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.

Which of the following nerves provides sensory innervation to the skin over the posterior aspect of the arm?

a) Median nerve

b) Radial nerve

c) Ulnar nerve

d) Axillary nerve

Answer: b) Radial nerve

Reference: Standring, S. (Ed.). (2016). Gray's Anatomy: The Anatomical Basis of Clinical Practice (41st ed.). Elsevier.

Which of the following brachial plexus nerves provides motor innervation to the rhomboid muscles?

a) Long thoracic nerve

b) Dorsal scapular nerve

c) Suprascapular nerve

d) Subscapular nerve

Answer: b) Dorsal scapular nerve

Reference: Drake, R. L., Vogl, W., & Mitchell, A. W. M. (2015). Gray's Anatomy for Students (3rd ed.). Churchill Livingstone.

Which of the following nerves provides motor innervation to the levator scapulae muscle?

a) Long thoracic nerve

b) Dorsal scapular nerve

c) Suprascapular nerve

d) Subscapular nerve

Answer: b) Dorsal scapular nerve

Reference: Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2014). Clinically Oriented Anatomy (7th ed.). Lippincott Williams & Wilkins.