When the rectum is inflated with air through a rectal tube, pain and tenderness occur in the right iliac fossa in case of appenidicitis. This is known as?
**Core Concept**
The phenomenon of pain and tenderness occurring in the right iliac fossa upon rectal inflation in the case of appendicitis is related to referred pain. This occurs due to the shared innervation between the rectum and the appendix, specifically the T10 dermatome, which is responsible for transmitting pain signals from both regions.
**Why the Correct Answer is Right**
The correct answer is related to the concept of referred pain, which arises from the convergence of visceral and somatic afferent fibers in the spinal cord. In the case of appendicitis, the inflammation of the appendix leads to the stimulation of visceral afferent fibers, which then transmit pain signals to the spinal cord. The same T10 dermatome, which is responsible for the innervation of the rectum, also receives these pain signals, resulting in referred pain in the right iliac fossa.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not relevant to the phenomenon of pain and tenderness occurring in the right iliac fossa upon rectal inflation in the case of appendicitis.
**Option B:** This option is incorrect as it does not accurately describe the phenomenon of pain and tenderness occurring in the right iliac fossa upon rectal inflation in the case of appendicitis.
**Option D:** This option is incorrect as it does not accurately describe the phenomenon of pain and tenderness occurring in the right iliac fossa upon rectal inflation in the case of appendicitis.
**Clinical Pearl / High-Yield Fact**
The phenomenon of referred pain in appendicitis is a classic example of the convergence of visceral and somatic afferent fibers in the spinal cord, leading to the transmission of pain signals to the same dermatome as the innervated organ. This is a high-yield fact that can be remembered using the mnemonic "T10: The common denominator for referred pain in appendicitis".
**Correct Answer: C. Rovsing's sign**