What is the name of the space along the superior portion of the longitudinal fissure?

• A. Falx cerebri
• B. Superior sagittal sinus
• C. Transverse sinus
• D. Occipital sinus

Answer: (B)

The space along the superior portion of the longitudinal fissure is known as the superior sagittal sinus. This structure plays a crucial role within the venous drainage system of the brain. It is a large, venous channel that runs along the top of the brain, directly beneath the falx cerebri, which is a fold of dura mater that separates the two cerebral hemispheres.

The superior sagittal sinus collects blood from the superficial veins of the brain and channels it toward the confluence of sinuses at the back of the skull. Its anatomy is significant not only for its role in venous drainage but also for its connections to other sinuses, including how it receives contributions from the transverse sinuses. Understanding the superior sagittal sinus is fundamental for interpreting various imaging modalities and comprehending intracranial pressure dynamics, making it a key concept for those studying angio and interventional radiology.