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Increased intracranial pressure (ICP) can manifest through various physical signs, one of which is the dilation of pupils. When the ICP rises, it can affect the function of the cranial nerves, specifically the third cranial nerve, which is responsible for controlling pupil size. Dilation of pupils can indicate that the brain is under stress; this occurs because the nerve pathways that govern pupil constriction may be compromised due to increased pressure within the skull.

This finding can reflect a serious neurologic condition, often requiring immediate medical attention to prevent further complications, such as reduced blood flow to the brain or brain herniation.

In contrast, decreased body temperature, clear speech, and improved coordination do not typically indicate increased ICP. Generally, a patient experiencing increased ICP might show impaired consciousness, irregular speech patterns, and coordination issues rather than improvements in these functions. By understanding these symptoms and their significance, healthcare providers can better assess and respond to changes in a patient's condition following a traumatic brain injury.