Symptoms Of Brachial Plexus Quiz
The most serious brachial plexus injury occurs when the nerve root is torn from the spinal cord. The brachial plexus is a network of nerves formed by the ventral rami of the lower four cervical nerves and first thoracic nerve. See how well you understand symptoms of brachial plexus by taking up this quiz.
Questions and Answers
- 1.
Where does the axillary nerve come from?
Explanation
The axillary nerve originates from the posterior cord of the brachial plexus. The brachial plexus is a network of nerves that innervates the upper limb. It is formed by the fusion of nerve roots from the spinal cord. The posterior cord gives rise to several nerves, including the axillary nerve, which supplies the deltoid and teres minor muscles.Rate this question:
- 2.
Where does the medial pectoral nerve come from?
Explanation
The medial pectoral nerve originates from the medial cord of the brachial plexus. It arises from the anterior rami of the spinal nerves C8 and T1.Rate this question:
- 3.
Where does the nerve that supplies serratus anterior come from?
Explanation
Long thoracic nerveRate this question:
- 4.
Where does the nerve that supplies levator scapulae come from?
Explanation
dorsal scapular nerveRate this question:
- 5.
What nerve innervates lat dorsi?
Explanation
The thoracodorsal nerve innervates the latissimus dorsi muscle. This nerve arises from the posterior cord of the brachial plexus and provides motor innervation to the latissimus dorsi muscle, which is responsible for adduction, extension, and medial rotation of the arm at the shoulder joint.Rate this question:
- 6.
What does the medial cord become?
Explanation
The medial cord is one of the three main branches of the brachial plexus, a network of nerves that innervates the upper limb. It gives rise to several nerves, including the ulnar nerve. The ulnar nerve is responsible for providing sensory and motor innervation to the muscles of the forearm and hand. Therefore, the correct answer is ulnar nerve because it is the nerve that originates from the medial cord of the brachial plexus.Rate this question:
- 7.
What joins together to form the median nerve?
Explanation
The median nerve is formed by the joining of the medial and lateral cords. These cords are part of the brachial plexus, a network of nerves that originate from the spinal cord in the neck and supply the upper limbs. The medial cord contains fibers from the lower trunk of the brachial plexus, while the lateral cord contains fibers from the upper and middle trunks. When these cords come together, they form the median nerve, which innervates muscles in the forearm and hand, as well as providing sensory information from these areas.Rate this question:
- 8.
Where does the nerve that supplies subscapularis come from?
Explanation
superior subscapular nerveRate this question:
- 9.
What is the lateral cutaneous nerve to the forearm a branch of?
Explanation
The lateral cutaneous nerve to the forearm is a branch of the musculocutaneous nerve. This nerve originates from the brachial plexus and supplies sensory innervation to the lateral aspect of the forearm. The musculocutaneous nerve also provides motor innervation to the muscles in the anterior compartment of the arm, including the biceps brachii, brachialis, and coracobrachialis. Therefore, it is responsible for both sensory and motor functions in the forearm and plays an important role in the overall function of the upper limb.Rate this question:
- 10.
Which nerve pierces coracobrachialis?
Explanation
The musculocutaneous nerve pierces through the coracobrachialis muscle.Rate this question:
- 11.
What does the ulnar nerve supply?
- A.
Intrinsic muscles of the hand
- B.
Thenar muscles
- C.
Medial half of FDP
- D.
Lateral half of FDP
- E.
FCU
Correct Answer(s)
A. Intrinsic muscles of the hand
C. Medial half of FDP
E. FCUExplanation
The ulnar nerve supplies the intrinsic muscles of the hand, which are responsible for fine motor movements and control of the fingers. It also supplies the medial half of the flexor digitorum profundus (FDP) muscle, which helps in flexing the fingers. Additionally, the ulnar nerve supplies the flexor carpi ulnaris (FCU) muscle, which is involved in flexion and adduction of the wrist.Rate this question:
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Mar 21, 2023Quiz Edited by
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May 25, 2009Quiz Created by
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