Cranial nerve impairments in spina bifida commonly appear during which period?

• A. Often within the first few weeks of life
• B. Later in childhood
• C. At adolescence
• D. In adulthood

Answer: (A)

Cranial nerve problems in spina bifida most often show up early because many affected infants have Chiari II malformation, where brainstem and hindbrain structures are descended and compressed at birth. This brainstem involvement disrupts several cranial nerves right away, so signs appear in the neonatal period. You’ll commonly see feeding difficulties and a weak or altered cry due to problems with swallowing and laryngeal control (affecting nerves involved in swallowing and voice), as well as episodes of stridor or apnea from impaired airway innervation. Because the underlying brainstem compression is present from birth, these cranial nerve impairments are typically noticed within the first few weeks of life rather than later in childhood or adulthood. Later-onset issues can occur from other Spina Bifida-related problems (like tethered cord or hydrocephalus), but the cranial nerve signs tied to brainstem dysfunction are most evident early.