What does "Also referred to as the reptilian brain" mean

Question

brain stem: the oldest part of the brain comprised of the mesencephalon, pons, and  medulla oblongata, and  connecting the spinal cord with the forebrain and  cerebellum. Also referred to as the reptilian brain. 

Answer 1

همچنین از آن به عنوان مغز خزنده  نام برده می شود.