Pain
referred to the right side of the neck extending laterally from the
right clavicle to the tip of the right shoulder is most likely to
involve which of the following?
A. Cervical cardiac accelerator nerves
B. Posterior vagal trunk
C. Right intercostals nerves
D. Right phrenic nerve
A. Cervical cardiac accelerator nerves
B. Posterior vagal trunk
C. Right intercostals nerves
D. Right phrenic nerve
Ans. D. Right phrenic nerve
The phrenic nerve,which arises from
cervical nerves C3 through C5, mediates sensation from diaphragmatic pleura and peritoneun,, as well
as from the pericardium;in addition, it carries motor fibers to the diaphragm.
• Therefore, pain from the diaphragmatic
pleura or peritoneum, as well as from the parietal Dencardium,may be referred
to dermatomes between C3 and C5, inclusive.
• Those dermatomes correspond to the
clavicular region and the anterior and lateral neck, as well as to the anterior,
lateral, and posterior aspects of the shoulder.
• Cervical cardiac accelerator nerves
would be sympathetic,generally from T1-5
