Yes. Palmar and thenar do mean the same thing. Palmar is of or relating to the palm of the hand and thenar refers to the muscle on your hand where the thumb meets the palm. The thenar eminence refers...
Definitely the same as. I don't think we ever use the same with. Well except for Person A: Oh no! I forgot to lock my house today. Person B. Same with Jenny. Which means, Jenny forgot to lock her...