In this task, you are given a sentence in the Spanish language. Your task is to translate the Spanish sentence into the English language.

[EX Q]: Cuando valora a un paciente con un problema neurológico, usted comprueba que presenta signo de Kerning positivo. Este hallazgo se relaciona con
[EX A]: When you assess a patient with a neurological problem, you check that he has a positive Kerning sign. This finding is related to

[EX Q]: Es una molécula coestimuladora que se expresa en las células presentadoras de antígeno
[EX A]: It is a costimulatory molecule that is expressed in the antigen-presenting cells

[EX Q]: ¿Con qué suele asociarse la cataplejía característica de la narcolepsia?
[EX A]:
What do you usually associate with the cataplexy characteristic of narcolepsy?