In the spine, the epidural space (also known as "extradural space" or "peridural space") is the outermost part of the spinal canal. It is the space within the canal (formed by the surrounding vertebrae) lying outside the dura mater (which encloses the arachnoid mater, subarachnoid space, the cerebrospinal fluid, and the spinal cord). In humans the epidural space contains lymphatics, spinal nerve roots, loose fatty tissue, small arteries, and a network of large, thin-walled blood vessels called the epidural venous plexus.
The upper limit of the epidural space is the foramen magnum, which is the point where the spine meets the base of the skull. The lower limit is at the tip of the sacrum, at the sacrococcygeal membrane.
In the head, the dura is continuous with the periosteum, the tough fibrous lining of the inside of the skull. This means that, in the head, the epidural space is known as a potential space, which means that normally it does not exist. In rare circumstances, a torn artery (e.g. the middle meningeal artery) may cause bleeding which is sufficient to separate both the dura and periosteum from the bone; this is an epidural hematoma.
The space between the dura and the arachnoid (in both head and spine), the subdural space, is also a potential space. Bleeding may also occur here.
reference: wikipedia
Epidural Space
Epidural Space
epidural space
A Subdural Hematoma occurs when a severe acceleration to deceleration occurs leading to the veins in the subdural space tearing. An Epidural Hematoma occurs from direct trauma to the brain leading to bleeding in the meningeal artery.
why DeNovo path way absent in R.B.C. and brain?
epidural space
In the spine ; The outermost part of the spinal canal .
the epidural space
lagamentum flava
a space is where matter and weight is absent
when an anaesthetic is injected into the sub-aracnoid sapce the patient can have a copmlete block that can lead to death,whilst into the epidural space painrelief will be effective.,
In humans the epidural space contains lymphatics, spinal nerve roots, loose fatty tissue, small arteries, and a network of large, thin-walled blood vessels called the epidural venous plexus.