Which nerves innervate serratus posterior superior?

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Multiple Choice

Which nerves innervate serratus posterior superior?

Explanation:
The serratus posterior superior gets its nerve supply from the ventral rami of the upper thoracic spinal nerves, specifically the intercostal nerves from T2 to T5. This segmental innervation fits its role in elevating ribs 2–5 during inspiration. Other nerves listed don’t supply this muscle: the dorsal scapular nerve goes to rhomboids and levator scapulae, the accessory nerve to trapezius and SCM, and T9–T12 intercostals would correspond to lower structures rather than the serratus posterior superior.

The serratus posterior superior gets its nerve supply from the ventral rami of the upper thoracic spinal nerves, specifically the intercostal nerves from T2 to T5. This segmental innervation fits its role in elevating ribs 2–5 during inspiration. Other nerves listed don’t supply this muscle: the dorsal scapular nerve goes to rhomboids and levator scapulae, the accessory nerve to trapezius and SCM, and T9–T12 intercostals would correspond to lower structures rather than the serratus posterior superior.

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