The DRG contains neurons that control the
A) external oblique and internal intercostal muscles.
B) rectus abdominis and external intercostal muscles.
C) external intercostal muscles and diaphragm.
D) internal intercostal muscles and diaphragm.
E) internal oblique and internal intercostal muscles.

Question

Quizplus · Accepted Answer

The DRG (Dorsal Root Ganglia) contains sensory neurons that transmit sensory information, including pain and touch, to the spinal cord. However, the control of muscles, such as the external intercostal muscles and the diaphragm, is primarily a function of motor neurons originating in the spinal cord, not the DRG. The external intercostal muscles and the diaphragm are crucial for the process of breathing. The external intercostal muscles help expand the thoracic cavity during inhalation, and the diaphragm contracts to increase the volume of the thoracic cavity, facilitating inhalation. This choice is selected based on the understanding of the roles of these muscles in respiration, despite the initial premise about DRG's role being slightly misleading in the context of muscle control.

The DRG Contains Neurons That Control the