The extradural space, also known as the epidural space, is a potential space located between the cranial bones and the endosteal layer of the dura mater, which typically adheres closely to the cranial bone.
Understanding the Extradural Space
The extradural space isn't normally a true, open space. Instead, it's considered a potential space, meaning it can become a real space under certain conditions, such as:
- Hemorrhage: Bleeding into this area can separate the dura mater from the skull, creating an actual space.
- Trauma: Head injuries can cause the dura to detach from the skull, forming a space.
Location and Significance
The extradural space's location is crucial:
- Between Cranial Bones and Dura Mater: This specific location is what defines it. The dura mater is the outermost of the three layers of membranes protecting the brain and spinal cord.
- Potential for Space Formation: As noted in the reference, in normal conditions the dura mater adheres to the cranial bone; therefore, the extradural space is only a potential one.
Clinical Relevance
Understanding the extradural space is essential for:
- Diagnosing Extradural Hematomas: These occur when blood collects in the extradural space, often due to traumatic injuries.
- Understanding Neurological Symptoms: Compression of brain tissue due to extradural hematomas can lead to various neurological problems.
