Learn About Nerves Of The Thorax! Trivia Quiz

The phrenic nerves are responsible for providing motor and sensory innervation to the diaphragm, which is the primary muscle involved in the process of breathing. These nerves originate from the spinal cord in the neck and travel down to the diaphragm, controlling its movements and transmitting sensory information. Therefore, it is correct to say that the phrenic nerves innervate the diaphragm.

They originate from spinal nerves T1-T11

The statement is true because the sympathetic nerve chains do indeed run on either side of the vertebral column. These chains consist of a series of ganglia connected by nerve fibers and are part of the autonomic nervous system. They play a crucial role in the body's "fight or flight" response, helping to regulate various bodily functions such as heart rate, blood pressure, and digestion.

The medial and lateral pectoral nerves originate from the brachial plexus. The brachial plexus is a network of nerves that originates from the spinal cord in the neck region and supplies the upper limb. The pectoral nerves innervate the pectoral muscles, which are located in the chest area. Therefore, it makes sense that these nerves would originate from the brachial plexus, which is responsible for supplying the nerves to the upper limb.

The vagus nerve is cranial nerve X. It is the longest cranial nerve and serves multiple functions, including controlling the muscles of the throat, voice box, and heart. It also plays a role in regulating digestion, breathing, and blood pressure.

The lateral pectoral nerve is a branch of the brachial plexus that supplies the pectoralis major muscle. It arises superiorly to the pectoralis minor muscle, which means it originates above this muscle. This is true because the pectoralis minor muscle lies deep to the pectoralis major muscle, and the lateral pectoral nerve travels superiorly to reach the pectoralis major.

The medial pectoral nerve innervates both the pectoralis major and pectoralis minor muscles. This means that it provides the necessary nerve supply for the contraction and movement of both muscles.

The intercostal nerves run between the internal intercostal muscle and the innermost intercostal muscle. These muscles are located between the ribs and are responsible for the movement of the ribcage during breathing. The intercostal nerves provide sensory and motor innervation to these muscles, allowing them to contract and relax effectively.

The left and right vagus nerves give rise to the left and right recurrent laryngeal nerves.

It begins its course behind the axillary artery