Question

Identify the arrow-marked nerve. 

• A. Medial pectoral nerve
• B. Lateral pectoral nerve
• C. Long thoracic nerve
• D. Thoracodorsal nerve

Hint:

In neuroanatomy, it is important to familiarize yourself with the origins and functions of the various peripheral nerves, especially their anatomical landmarks.

Answer 1

The Correct Option is A

The image shows the anatomical location of the pectoral nerves. The medial pectoral nerve is the nerve that innervates the pectoralis major and pectoralis minor muscles, and it originates from the medial cord of the brachial plexus (C8-T1).
- Option (1) is the correct answer, as the arrow in the image is pointing to the medial pectoral nerve. - Option (2) is incorrect because the lateral pectoral nerve originates from the lateral cord of the brachial plexus (C5-C7).
- Option (3) is incorrect because the long thoracic nerve arises from the roots of C5-C7 and innervates the serratus anterior muscle.
- Option (4) is incorrect because the thoracodorsal nerve originates from the posterior cord of the brachial plexus (C6-C8) and innervates the latissimus dorsi muscle.