Internal oblique innervation is provided by which pair of nerves?

Internal oblique innervation is provided by which pair of nerves?

• A. Iliohypogastric nerve and ilioinguinal nerve
• B. Iliohypogastric nerve
• C. Ilioinguinal nerve
• D. Subcostal nerve

Answer: (A)

Nerve supply to the internal oblique comes from the ventral rami of L1 via the iliohypogastric and ilioinguinal nerves. These two nerves travel through the abdominal wall to innervate the internal oblique (and transversus abdominis) and also provide sensation to the lower abdomen and groin. Because both iliohypogastric and ilioinguinal nerves contribute to motor innervation of this muscle group, this pair is the best answer. The other nerves listed do not together account for the typical dual innervation pattern of the internal oblique in the lower abdominal wall.

Nerve supply to the internal oblique comes from the ventral rami of L1 via the iliohypogastric and ilioinguinal nerves. These two nerves travel through the abdominal wall to innervate the internal oblique (and transversus abdominis) and also provide sensation to the lower abdomen and groin. Because both iliohypogastric and ilioinguinal nerves contribute to motor innervation of this muscle group, this pair is the best answer. The other nerves listed do not together account for the typical dual innervation pattern of the internal oblique in the lower abdominal wall.