Dural Anatomy

Following a prologue to dural venous sinuses this article focuses on arachnoid granulations tributaries and the drainage pattern of the venous sinuses. Anatomy and function of the dural venous sinuses.

The Meninges Of The Brain And Medulla Spinalis Human Anatomy

The termination of the sac well below the conus medullaris classically found at l1 in the adult also provides a degree of safety when performing spinal anesthesia.

Dural anatomy. There are two sagittal sinuses that occupy the longitudinal cerebral fissure. Dural venous sinuses sagittal sinuses. There are two main dural reflections.

The falx cerebri which separates the two hemispheres of the brain is located in the longitudinal cerebral fissure between the. Spinal nerves as there are eight cervical spinal nerves and seven vertebrae the nerves in this region only are numbered according to the vertebra below. They receive blood from internal and external veins of the brain receive cerebrospinal fluid csf from the subarachnoid space via arachnoid granulations and mainly empty into the internal jugular vein.

The dural venous sinuses also called dural sinuses cerebral sinuses or cranial sinuses are venouschannels found between the endosteal and meningeal layers of dura mater in the brain. The sphenoparietal sinus courses along the free border. They receive blood from the cerebral veins receive cerebrospinal fluid csf from the subarachnoid space via arachnoid granulations and mainly empty into the internal jugular vein.

The dural venous sinuses also called dural sinuses cerebral sinuses or cranial sinuses are venous channels found between the endosteal and meningeal layers of dura mater in the brain. Each anterior cerebral vein leaves the longitudinal cerebral fissure inferiorly. The dural sac contains the anterior and posterior spinal nerve roots collectively know as the cauda equina.

The dural sac and closely adherent arachnoid mater on its inner surface are a barrier to drug migration into and out of the cerebrospinal fluid during epidural anesthesia. The absence of lymphatic drainage in the brain places the venous outflow system on a pedestal of prime importance. The tentorium cerebelli exists between and separates the cerebellum and brainstem from the occipital lobes of the cerebrum.

Dura Mater Superior Sagittal Sinus Subdural Space