Sentence 1: The Ferguson reflex is the vaginal reflex comprising the self-sustaining cycle of neuroendocrine contractions initiated by pressure at the cervix or uterine walls .
Sentence 2: The Ferguson reflex is the vaginal reflex comprising the self-sustaining cycle of neuroendocrine contractions initiated by pressure on the cervix or the uterine walls .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?