The Spinal Root of Which Cranial Nerve Pair Innervates the Sternocleidomastoid

question 106

Multiple Choice

The spinal root of which cranial nerve pair innervates the sternocleidomastoid and trapezius muscles?

• A) IV
• B) V
• C) VIII
• D) XI
• E) XII

---

Definitions:

Opportunity Cost

The charge of rejecting the following prime opportunity in the process of decision-making.

Sunk Costs

Sunk costs are expenditures that have already been incurred and cannot be recovered, and should not affect future investment decisions or operations.

Opportunity Costs

The forfeit of discarding the next top choice during the decision-making procedure.

Scarce Resources

Resources that are limited in availability and cannot satisfy all the various uses for them, leading to competition and the need for allocation.