which muscle of the abdominal region inserts at the linea alba and pubis
Linea alba (abdomen) It is formed by the fusion of the aponeuroses of the abdominal muscles, and it separates the left and right rectus abdominis muscles. In muscular individuals its presence can be seen on the skin, forming the depression between the left and right halves of a "six pack".
Perineum In human anatomy, the perineum (/pɛrɪˈniːəm/;[1] late Latin, from Greek περίνεος perineos perinaeon, peri-, around + inein to discharge or defecate), is the space between the anus and scrotum in the male and between the anus and the vulva in the female.[2] The perineum is the region of the body between the pubic symphysis (pubic arch) and the coccyx (tail bone), including the perineal /pɛrəˈniːəl/ body and surrounding structures. There is some variability in how the boundaries are defined.[3] The perianal area (peri- and anal) is a subset of the perineum.