Functional Cerebral Venous Anatomy: A Perspective on Venous Collaterals Part II, Infratentorial Venous System

Area of Science:

• Neuroanatomy
• Vascular Anatomy
• Neurosurgery

Background:

• Infratentorial veins are densely packed and show significant variations.
• Posterior fossa venous anatomy is critical for neurointerventional procedures.

Purpose of the Study:

• To review posterior fossa venous development.
• To describe the functional venous anatomy of the posterior fossa, including brainstem, cerebellum, and emissary veins.

Main Methods:

• Literature review of posterior fossa venous anatomy.
• Description of venous drainage pathways (superior, anterior, posterior).

Main Results:

• Brainstem veins include longitudinal and transverse types.
• Venous drainage follows three main paths: Galenic, petrosal, and torcular.
• Anatomical variations like disconnections and anastomoses are common.

Conclusions:

• Knowledge of posterior fossa venous anatomy is vital for understanding pathological conditions.
• Essential for interpreting venous drainage patterns in arteriovenous shunts.