Impulses from the Medulla Reach the Diaphragm by Way of the _______

Question

Impulses from the medulla reach the diaphragm by way of the _______ nerves.
A) vagus
B) phrenic
C) tracheal
D) sciatic

Accepted Answer

The phrenic nerves originate from the cervical spinal cord and provide motor innervation to the diaphragm. Impulses from the medulla oblongata reach the diaphragm by way of these nerves, resulting in inspiration. The vagus nerve is not directly involved in the motor innervation of the diaphragm. The tracheal nerve is not a nerve that innervates the diaphragm. The sciatic nerve is a nerve that innervates the lower limb, but not the diaphragm.