P-DAT 5 Breast And Pectoral Region

1. Which of the following statements is true about the tagged structure (Use Q3 Image )?

It inserts onto the infraglenoid tubercle

It courses superficially over the pectoralis major muscle

It inserts onto the medial border of the scapula

It inserts onto the coracoid process

It courses posteriorly to the axillary artery

The correct answer is "It inserts onto the coracoid process." This means that the structure indicated in the image attaches to the coracoid process, which is a bony projection on the scapula.

Explanation

The correct answer is "It inserts onto the coracoid process." This means that the structure indicated in the image attaches to the coracoid process, which is a bony projection on the scapula.

2. The tagged muscle is typically innervated by which nerve?

Medial pectoral nerve

Long thoracic nerve

Medial brachial cutaneous nerve

Lateral pectoral nerve

Median nerve

The correct answer is the medial pectoral nerve because it is the nerve that typically innervates the tagged muscle.

Explanation

The correct answer is the medial pectoral nerve because it is the nerve that typically innervates the tagged muscle.

3. A lesion of the nerve that supplies the tagged muscle may be manifested by which of the following patient presentations?

A protracted scapula

An inability to medially rotate the arm

An inability to laterally rotate the arm

An inability to adduct the arm

A winged scapula

A winged scapula can be caused by a lesion of the nerve that supplies the tagged muscle. This is because the winged scapula refers to the abnormal protrusion or prominence of the scapula bone, which can occur when the muscles that stabilize the scapula are weakened or paralyzed due to nerve damage. Therefore, a winged scapula can be a manifestation of a nerve lesion affecting the muscles involved in scapula stabilization.

Explanation

A winged scapula can be caused by a lesion of the nerve that supplies the tagged muscle. This is because the winged scapula refers to the abnormal protrusion or prominence of the scapula bone, which can occur when the muscles that stabilize the scapula are weakened or paralyzed due to nerve damage. Therefore, a winged scapula can be a manifestation of a nerve lesion affecting the muscles involved in scapula stabilization.