Increased intracranial pressure is defined as which?

• A. Elevated pressure within the skull affecting brain function
• B. Decreased pressure within the skull
• C. Elevated pressure within the spinal canal
• D. No change in skull pressure

Answer: (A)

Increased intracranial pressure means elevated pressure inside the skull, where brain tissue, cerebrospinal fluid, and blood reside. When this pressure rises, it can compress brain tissue and reduce cerebral perfusion, leading to brain dysfunction and potential injury. The description that matches this concept is elevated pressure within the skull affecting brain function, since it specifies both the location (inside the skull) and the consequence (impact on brain function). The other ideas describe decreased skull pressure, pressure in a different space (the spinal canal), or no change in skull pressure, none of which define increased intracranial pressure.