Content Content

Answer: The alar plate is lateral to the basal plate. The alar plates become sensory cranial nerve nuclei; the basal plates become motor cranial nerve nuclei.

The Nervous System

Answer: The alar plate is lateral to the basal plate. The alar plates become sensory cranial nerve nuclei; the basal plates become motor cranial nerve nuclei.

Clinical Considerations

The Nervous System

Failure of the anterior neuropore to close results in upper neural tube defects (NTDs; e.g., anencephaly).

The Nervous System

Failure of the posterior neuropore to close results in lower NTDs (e.g., spina bifida with myeloschisis).

The Nervous System

Schwannoma

Classically at the cerebellopontine angle K , benign, involving CNs V, VII, and VIII, but can be along any peripheral nerve. Often localized to CN VIII in internal acoustic meatus Ž vestibular schwannoma (can present as hearing loss and tinnitus). Bilateral vestibular schwannomas found in NF-2. Resection or stereotactic radiosurgery

The Nervous System