Final answer:
The LaSegue sign is observed during ipsilateral SLR, while the Cross and LeSeague sign is observed during contralateral SLR.
Step-by-step explanation:
The subject of this question is Medicine. The information provided refers to the signs observed during a physical examination of a patient. The LaSegue sign is a sign that can be observed during a straight leg raise (SLR) test where the patient experiences pain radiating down the same leg. It is observed in approximately 98% of patients during an ipsilateral SLR. On the other hand, the Cross and LeSeague sign is a sign observed during a contralateral SLR where the patient experiences pain radiating down the opposite leg. This sign is observed in around 20% of patients.