A nurse is caring for a client who has headaches.
Which of the following precipitating factors is common in both tension-type headaches and cluster headaches?

Choice A rationale
A contrecoup injury is indeed a “true” injury. It occurs on the side of the brain opposite to the point of impact and can have severe consequences, including brain damage. Therefore, this statement is incorrect.
Choice B rationale
The severity and healing time of contrecoup injuries can vary greatly depending on the force and location of the impact, as well as individual health factors. It’s not accurate to say that contrecoup injuries are generally less severe and heal more quickly over time.
Choice C rationale
This statement is correct. A coup injury refers to the brain damage that occurs directly under the point of impact, while a contrecoup injury occurs on the opposite side of the brain from

where the head is struck. These injuries can occur separately or together, but if the blow is strong enough, they usually appear together.
Choice D rationale
The sequence of coup and contrecoup injuries is not as this choice describes. The coup injury happens at the point of impact, and the contrecoup injury happens when the brain rebounds and hits the opposite side of the skull. Both types of injuries can impact the brain’s blood supply.

Choice A rationale
Swelling of the optic nerve, also known as papilledema, can be a sign of increased intracranial pressure (ICP). However, it is not a direct indicator of a worsening neurological condition.
Choice B rationale
The Glasgow Coma Scale (GCS) is a clinical tool used to assess a patient’s level of consciousness and neurological functioning. A decreasing GCS score indicates a worsening neurological condition, which could be due to increasing ICP12. Therefore, a decreasing GCS score is a direct indicator of a worsening neurological condition.
Choice C rationale
A blood pressure of 108/76 mm Hg is within the normal range and does not directly indicate a worsening neurological condition. However, drastic changes in blood pressure could potentially indicate a problem.
Choice D rationale

Changes in pupil size and shape can be a sign of increased ICP, but these changes are not specific to a worsening neurological condition. They could be due to various factors, including medication effects or damage to the cranial nerves.
Choice E rationale
A respiratory rate of 12/min is within the normal range for adults. Changes in respiratory patterns could potentially indicate a worsening neurological condition, but a rate of 12/min does not directly indicate this.