Intrinsic muscles of the back that promote extension of the spine (or head) include all but a. splenius muscles, b. semispinalis muscles, c. scalene muscles, d. erector spinae.

Video transcript

Hi, everyone. Let's take a look at this practice problem together, a group of muscles located in the neck are termed a vastu muscles. B, scali muscles, C gluteus, maximus, and D subscapularis. So sometimes in anatomy, you just have to have things memorized. But we're told we're looking for a group of muscles so we can use that as a clue and we should be able to eliminate a couple of our answer options based off of that clue. So, option C, the gluteus maximus, most of us should recognize this as a single muscle. It makes up most of the flesh of the buttocks. So option C is incorrect. Option D subscapularis, we have the prefix sub, which means under beneath and scapulars sounds like scapula. So yes, this is a muscle that interacts with the scapula. It's located in the subscapular FASA. Again, the subscapularis is a single muscle and it's part of the rotator cuff. So option D is incorrect as well. So we have either vastu or skyline to choose from. So the vastest muscles recall make up the quadriceps for Morris muscles and those are found in the leg. So that means the correct answer is option B the sca muscles. All right. Everyone. I hope you found this helpful and I'll see you soon for the next practice problem.