How many branches does the PSA nerve have?

How many branches does the PSA nerve have?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

The PSA nerve typically divides into two main terminal branches as it courses through the posterior maxilla to supply the molars and their buccal gingiva. This two-branch pattern is the most consistently described in anatomy references, which is why two is the best answer. There can be some variation with additional small branches or occasional communications, but the standard teaching emphasizes two primary branches innervating the posterior maxillary teeth.

The PSA nerve typically divides into two main terminal branches as it courses through the posterior maxilla to supply the molars and their buccal gingiva. This two-branch pattern is the most consistently described in anatomy references, which is why two is the best answer. There can be some variation with additional small branches or occasional communications, but the standard teaching emphasizes two primary branches innervating the posterior maxillary teeth.