5 Questions
What encases the brain to protect it from injury?
Cranium
What limits the access of blood borne materials into the brain tissue?
Highly selective blood brain barrier
Where is cerebrospinal fluid present in the nervous system?
Ventricles of the brain, cisterns around the outside of the brain, subarachnoid space around both the brain and spinal cord
What is the total capacity of the cerebral cavity enclosing the brain and spinal cord?
1600 to 1700 milliliters
How is the pressure of cerebrospinal fluid maintained?
All chambers connected with one another maintain constant pressure
Study Notes
Brain Protection and Cerebrospinal Fluid
- The brain is encased in the cranium, which protects it from injury.
- The blood-brain barrier limits the access of blood-borne materials into the brain tissue.
- Cerebrospinal fluid (CSF) is present in the nervous system, specifically in the cerebral ventricles, subarachnoid space, and central canal of the spinal cord.
- The total capacity of the cerebral cavity enclosing the brain and spinal cord is approximately 150 mL.
- The pressure of cerebrospinal fluid is maintained by a delicate balance between its production and absorption, with an average pressure of 10-15 mmHg.
Test your knowledge of the major features that protect the central nervous system (CNS) from injury and the structure of the cranium and vertebral column. Explore the protective membranes, cerebrospinal fluid, and the blood-brain barrier.
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