46 Questions
Which nerve arises from the roots and trunks of the brachial plexus?
Dorsal scapular nerve
Which nerve is formed by the joining of the medial and lateral cords of the brachial plexus?
Median nerve
Which nerve is not a branch of the lateral cord of the brachial plexus?
Median nerve
Which nerve is not a branch of the medial cord of the brachial plexus?
Radial nerve
Which nerve is a branch of the posterior cord of the brachial plexus?
Axillary nerve
Which cord of the brachial plexus is formed from the anterior divisions of the superior and middle trunks?
Lateral cord
Which cord of the brachial plexus is formed from the posterior divisions of all three trunks?
Posterior cord
Which cord of the brachial plexus is formed from the anterior division of the inferior trunk?
Medial cord
How many terminal branches does the brachial plexus have?
5
Which part of brachial plexus passes through the scalene muscles?
Roots
Which part of the trapezius muscle covers the upper and back part of the neck and shoulders?
All parts of the trapezius
Which nerve innervates the upper fibers of the trapezius muscle?
Spinal accessory nerve (CN XI)
Which nerve innervates the rhomboids minor muscle?
Dorsal scapular nerve
Which nerve innervates the levator scapulae muscle?
Dorsal scapular nerve
Which nerve innervates the pectoralis minor muscle?
Medial pectoral nerve
Which nerve innervates the serratus anterior muscle?
Long thoracic nerve (C5,6,7)
Which nerve innervates the pectoralis major muscle?
Medial and lateral pectoral nerves
Which nerve innervates the latissimus dorsi muscle?
Thoracodorsal nerve
Which of the following correctly describes the brachial plexus?
It is formed by the union of the anterior rami of C5 – T1.
Which muscles are supplied by the anterior divisions of the trunks of the brachial plexus?
Flexor compartments of the upper limb.
Where do the roots of the brachial plexus usually pass through?
The gap between the anterior and the middle scalene muscles.
How many trunks does the brachial plexus have?
3
What does the lateral cord of the brachial plexus consist of?
Anterior divisions of the superior and middle trunks.
What does the medial cord of the brachial plexus consist of?
Anterior division of the inferior trunk.
What does the posterior cord of the brachial plexus consist of?
Posterior divisions of all three trunks.
Where do almost all branches of the brachial plexus arise?
In the axilla.
Which of the following is NOT true about the brachial plexus?
It begins in the neck.
Which of the following is NOT a trunk of the brachial plexus?
Posterior trunk
The supraclavicular part of the brachial plexus gives rise to the long thoracic nerve
True
The infraclavicular part of the brachial plexus gives rise to the subscapular nerve
False
The dorsal scapular nerves arises from the ____clavicular part of the plexus (infra or supra)
Which of the following is a branch of the lateral cord?
Lateral pectoral nerve
The primary action(s) of the upper fibers of the trapezius are
Elevation and upward rotation of scap
Which nerve innervates the levator scapulae muscle?
Dorsal scapular nerve
What is the primary function of the rhomboids minor muscle?
Retraction (adduction) of spine
Which nerve innervates the serratus anterior muscle?
Long thoracic nerve
What is the primary function of the trapezius muscle?
Elevation of scapula
Which nerve innervates the rhomboids major muscle?
Dorsal scapular nerve
What is the primary function of the pectoralis major muscle?
Flexion of arm
Which nerve innervates the subclavius muscle?
Nerve to subclavius
What is the primary function of the serratus anterior muscle?
Protraction (abduction) of scapula
Which nerve innervates the trapezius muscle?
Spinal accessory nerve
What is the main action of the middle fibers of the trapezius?
Retraction of Scap
Pec Minor has similar actions to Pec major
False
List 3 actions that Pec Minor can perform at the scapula
Which action is associated with latissimus dorsi?
Anterior pelvic tilt
Test your knowledge of the brachial plexus and shoulder girdle muscles in this anatomy quiz. Covering topics from Moore's Clinically Oriented Anatomy, this quiz will assess your understanding of upper limb anatomy. Prepare for your in-person class with Dr. K. Lumsden and Dr. M. Doroudi at Boucher Campus or Toronto Campus.
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