Complex sentence: The enlarged section of the bowel is found proximally, while the narrowed, aganglionic section is found distally; the absence of ganglion cells results in a persistent over-stimulation of nerves within the affected region, resulting in contraction.
Split into simpler sentences: The enlarged section of the bowel is found proximally, while the narrowed, aganglionic section is found distally. The absence of ganglion cells results in a persistent over-stimulation of nerves in the affected region, resulting in contraction.