P-DAT 6 Axilla And Brachial Plexus

1. Damage to the tagged structure will result in numbness and loss of sensation to the skin on the__________.

Lateral forearm

Medial arm

Medial forearm

Lateral arm

Posterior arm

Damage to the tagged structure, which is located in the lateral forearm, will result in numbness and loss of sensation to the skin in that area.

Explanation

Damage to the tagged structure, which is located in the lateral forearm, will result in numbness and loss of sensation to the skin in that area.

2. Damage to the tagged structure will result in a sensory deficit of which of the following spinal nerve roots?

C5 – C6

C5 – C7

C6 – C8

C4 – C6

C7 –T1

Damage to the C5-C6 spinal nerve roots would result in a sensory deficit.

Explanation

Damage to the C5-C6 spinal nerve roots would result in a sensory deficit.

3. An artery runs along the lateral edge of the tagged structure. Which of the following statements best characterizes that artery?

It supplies the latissimus dorsi muscle

It supplies the teres major muscle

It anastomoses with the superior thoracic artery

It gives off the circumflex scapular artery

It supplies the serratus anterior muscle

The correct answer is "It supplies the serratus anterior muscle." This means that the artery mentioned in the question provides blood supply to the serratus anterior muscle.

Explanation

The correct answer is "It supplies the serratus anterior muscle." This means that the artery mentioned in the question provides blood supply to the serratus anterior muscle.

4. The tagged structure is associated with referred pain during a heart attack. Identify the tagged structure:

Long thoracic nerve

Thoracodorsal nerve

Intercostobrachial nerve

Medial cutaneous nerve of the arm

Third intercostal nerve

The intercostobrachial nerve is associated with referred pain during a heart attack.

Explanation

The intercostobrachial nerve is associated with referred pain during a heart attack.

5. A 20-year-old male was shot at close range during a robbery attempt. The bullet penetrated his axillary region, damaging the two tagged structures. The patient will have difficulty performing which of the following actions?

Medially rotating and flexing the arm

Laterally rotating and abducting the arm

Retracting and inferiorly rotating the scapula

Medially rotating and adducting the arm

Supinating and flexing the forearm

The axillary region is located in the armpit and contains important structures such as the axillary nerve and the posterior circumflex humeral artery. Damage to these structures can result in weakness or loss of function in the muscles that medially rotate and adduct the arm, such as the latissimus dorsi and teres major muscles. Therefore, the patient will have difficulty performing these actions.

Explanation

The axillary region is located in the armpit and contains important structures such as the axillary nerve and the posterior circumflex humeral artery. Damage to these structures can result in weakness or loss of function in the muscles that medially rotate and adduct the arm, such as the latissimus dorsi and teres major muscles. Therefore, the patient will have difficulty performing these actions.

6. Which of the following structures is NOT in close contact with the tagged structure? (Use Q6 Tag)

Lateral cord of brachial plexus

Axillary artery

Posterior cord of brachial plexus

Medial pectoral nerve

Medial cord of brachial plexus

The question asks which structure is NOT in close contact with the tagged structure. The tagged structure is not specified in the question, but based on the options given, it can be inferred that the tagged structure is the axillary artery. The axillary artery is in close contact with the lateral cord, posterior cord, medial pectoral nerve, and medial cord of the brachial plexus. Therefore, the structure that is NOT in close contact with the axillary artery is the posterior cord of the brachial plexus.

Explanation

The question asks which structure is NOT in close contact with the tagged structure. The tagged structure is not specified in the question, but based on the options given, it can be inferred that the tagged structure is the axillary artery. The axillary artery is in close contact with the lateral cord, posterior cord, medial pectoral nerve, and medial cord of the brachial plexus. Therefore, the structure that is NOT in close contact with the axillary artery is the posterior cord of the brachial plexus.

7. The tagged artery forms an anastomosis with which other artery?

Lateral thoracic

Superior thoracic

Circumflex scapular

Deep artery of the arm

Dorsal scapular

The tagged artery forms an anastomosis with the dorsal scapular artery.

Explanation

The tagged artery forms an anastomosis with the dorsal scapular artery.