[HN Gopher] New muscle layer discovered on the jaw ___________________________________________________________________ New muscle layer discovered on the jaw Author : giuliomagnifico Score : 89 points Date : 2021-12-27 19:21 UTC (3 hours ago) (HTM) web link (www.unibas.ch) (TXT) w3m dump (www.unibas.ch) | JimTheMan wrote: | It's always astonishing to find that the envelope of cutting edge | knowledge is sometimes far closer than you think. | | IE, jaw muscles hadn't been figured out yet. | rbanffy wrote: | That really doesn't help with my faith in medicine. It's not | that doctors don't know a lot of things that work for a lot of | conditions, but when it comes to knowing why something works, | things get a lot murkier. I cut them a lot of slack because we | evolved by chance and there is no design documentation or even | clear requirements to work with. | xiphias2 wrote: | ,,That really doesn't help with my faith in medicine'' | | Better knowledge of anatomy doesn't help medecine. Better | knowledge of aging process and immunology is much more | important for increasing human lifespan and decreasing human | suffering, and the last 10 years gave us amazing improvements | in the knowledge part. | TedDoesntTalk wrote: | > In a previous edition of Gray's Anatomy, from the year 1995, | the editors also describe the masseter muscle as having three | layers | | > Other individual studies from the early 2000s also reported | three layers | | So not entirely new. | [deleted] | DantesKite wrote: | Not entirely new, but apparently, not accepted by the medical | community. | DantesKite wrote: | "The arrangement of the muscle fibers, she says, suggests that | this layer is involved in the stabilization of the lower jaw. It | also appears to be the only part of the masseter that can pull | the lower jaw backwards - that is, toward the ear." | trelane wrote: | Seems a surprise that this has taken so long to be discovered, | as every motion seems to require two muscles--one to pull and | the other to relax/lengthen. | PaulHoule wrote: | It astonishes me how little help people can get for the very | common TMD so I am not surprised to find anything is | misunderstood about the functional anatomy of the jaw. | Nuzzerino wrote: | I've suffered since the age of 21, but the attacks are less | frequent these days (I'm 35). I do not take any painkillers | for it, even OTC. I have tried 6 or 7 "professionally-made" | mouth guards, some of which cost thousands. None of them | helped and would actually make it harder to sleep at night. | I instead deal with it by using heat, massage (full body is | key), exercise, and nutrition. | | For the record, I am also blown away by how incompetent the | medical and dental professions are at treating this. Tap | your teeth on a piece of paper? Puh-leeze, that does | nothing when your joints or muscles shift at different | times of the day, and maybe 1 in 5 dentists actually know | how to properly account for that based on my experience | dealing with them over the years. And swear to god, if I | hear another licensed and credentialed dentist describe my | joint hypermobility as "your jaw is weird", I'm going to | shit a brick. | AstroDogCatcher wrote: | Yes. First experienced TMJ pain as a teenager and almost | overdosed on painkillers while trying to get rid of it at | 3AM. Still recurrs about 2-3 times per year, but I've now | learned to feel it coming on much earlier and start loading | up on codiene in advance. | mkl95 wrote: | I have been getting it 10+ times a year since my early | 20s. Whenever it happens it's as terrifying as the very | first time. | [deleted] | PaulHoule wrote: | I had it a long time and was not sure the pain was | localized in the jaw (was it the neck, shoulders, back?) | or even the extent to which there was a physical lesion | or it was how my brain was interpreting things. | | My dentist told me I was grinding my teeth and prescribed | a bite guard and within two weeks the pain got better but | became very definitely focalized in the jaw and I noticed | 'popping' as a symptom. | | It has been about 1.5 years since the diagnosis. last | summer I went through a phase of throwing a lot of random | food into a pot and hitting it with an immersion blender, | getting shakes from Burger King whenever I felt like it, | etc. I lost almost 20 kg. | | I have been eating more normally since, it doesn't bother | me very often. | xhevahir wrote: | What sort of bite guard did you use? I clench my teeth | like there's no tomorrow and I've discovered over the | years that any bite guard that doesn't completely cover | every tooth (on either the lower or upper arch) will | eventually result in a supra-eruption of the exposed | tooth, with drastic consequences for my bite. | jacobolus wrote: | For other folks not familiar with these abbreviations, ht | tps://en.wikipedia.org/wiki/Temporomandibular_joint_dysfu | n... | cjbgkagh wrote: | AFAIK it's most likely a connective tissue disorder as | opposed to muscular. For this there is also little help and | rarely diagnosed. But at least may help find answers for | comorbidities that are often considered unrelated. | azinman2 wrote: | I thought Botox helped? | PaulHoule wrote: | I'm sure it does but I am sure sham injections help too. | amelius wrote: | Yes. Found this personal blog: | | https://www.byrdie.com/botox-for-teeth-grinding | | and scientific review paper: | | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5634354/ | yololol wrote: | To me it seems a surprise that this has taken so long to be | discovered in general. I thought we would know all muscles by | now. | Retric wrote: | It's been known about for at least 25 years, but there was | some debate about the specifics. Thus they "described this | layer in detail for the first time." | rbanffy wrote: | It spent a good couple million years literally under our | noses. ___________________________________________________________________ (page generated 2021-12-27 23:00 UTC)