Which of the following correctly describes the Brudzinski sign?

Assessment for meningeal irritation requires understanding the neurological manifestations of inflammation in the central nervous system. Knowledge of spinal cord anatomy and the mechanical effects of dural stretching is necessary to correctly identify and perform the Brudzinski and Kernig clinical signs. Choice A rationale Pain and resistance to leg extension when the hip is flexed describes a positive Kernig sign, not Brudzinski. This occurs because stretching the inflamed meninges and spinal roots causes protective muscle guarding and significant discomfort in patients with meningitis. Choice B rationale General neck pain during flexion is a symptom of nuchal rigidity but does not specifically define the Brudzinski sign. Nuchal rigidity is a broad clinical finding where the neck muscles are too stiff to allow for chin-to-chest movement without pain. Choice C rationale A positive Brudzinski sign occurs when passive flexion of the neck triggers involuntary flexion of the hips and knees. This is a reflexive postural response to the tension placed on the inflamed meninges and spinal cord during the neck maneuver. Choice D rationale Neck flexion causing shoulder rotation is not a recognized clinical indicator of meningeal irritation. Neurological assessments focus on the tension of the spinal axis; therefore, hip and knee flexion are the specific indicators looked for in this diagnostic test..