Ari Enkin

“ If one salted the whole head without making a hole in the skull then the [7] membrane and skull are forbidden, (3) [8] but the head is permitted along with any other meat that is with it. The thigh bone, as well as other bones that have marrow inside of them [9] must be salted [10] and the salting of the bone suffices for the marrow as well. The bone need not be pierced. [11] Nevertheless, ideally one should not salt it along with other meat, only alone. ”

“ We follow the Rashba who rules that the hair is not considered a problem for the purposes of salting. The cutting stated here is for those who want to be more meticulous, however the halacha does not require it for the head is as any other thick piece of meat. Regarding the brain, it suffices to make a hole in the bottom of the skull to allow the blood to flow out. ”

“ This is only if the outside meat on the head was removed from the skull, for if not then all other meat is forbidden since it received blood from the meat of the head. The first of the two reasons is the main reason.
[9] If it was cooked without having been salted, the marrow is forbidden because a lot of blood is found in the marrow. However, there is not an excess amount of blood, therefore if there is sixty in the pot then even the marrow is permitted.
[10] It is not comparable to the brain in which salting the head does not suffice. ”