Teacher:Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).
Teacher: Now, understand the problem? Solve this instance: Abstract: Subarachnoid hemorrhage has a profound effect on cerebrovascular reactivity. The present study noted a progressive change in the sensitivity and reactivity of rabbit basilar artery to serotonin after experimentally induced hemorrhage. The basilar artery exhibited an initial diminished response to serotonin for periods up to 6 hours after hemorrhage, whereafter the vessel gradually became hyperresponsive. The hypersensitivity became maximal 36 hours after hemorrhage and then began to return to normal. Such early onset of serotonin hypersensitivity and reactivity after subarachnoid hemorrhage has not been previously reported. The level of tension developed, however, suggests that serotonin alone is unlikely to cause vasospasm. The strict differentiation of spasm into early and delayed components is questioned.
Which is the apt title for the abstract? option1: Hemorrhage-induced alterations of rabbit basilar artery reactivity and sensitivity to serotonin. option2: Immature brain: spin-echo pulse sequence parameters for high-contrast MR imaging.
Student:
Hemorrhage-induced alterations of rabbit basilar artery reactivity and sensitivity to serotonin.