Errata and Changes:

In this episode, please note the following corrections for clarity:

• The anterior meningeal artery supplies the dura of the anterior cranial fossa (not the entire supratentorial dura).
• The middle fossa is part of the supratentorial dura, while the posterior fossa is part of the infratentorial dura.
• Some board review sources mention that V3 (the mandibular branch of the trigeminal nerve) innervates the posterior fossa dura and classify it under supratentorial innervation. However, the posterior fossa is primarily considered infratentorial and is more commonly innervated by the upper cervical nerves (C1-C3) and cranial nerve X (vagus nerve).

In this episode, we dive into the foundational concepts of neurosurgical anatomy, focusing on the meninges, cerebrospinal fluid (CSF), and the brain barriers. We cover the protective layers of the brain and spine, the production and function of CSF, and the critical role of the blood-brain and blood-CSF barriers in maintaining a stable environment. This episode is essential for anyone preparing for neurosurgical exams or seeking a refresher on these key anatomical structures.

For questions, feedback, or suggestions, feel free to reach out to Mustafa Farooq, MS4 at [email protected].