Muscles of Facial Expression – Anatomy Tutorial PART 2

Muscles of Facial Expression – Anatomy Tutorial PART 2

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…buccinator. So this muscle is a muscle
that forms the muscular component of the cheek. This is used when you’re puffing out your
cheeks and blowing air out of your mouth. So when you’re testing the patient’s seventh
nerve and you ask them to puff out their cheeks, you’re testing the function of the buccinator
muscle. So if you have to just remember four muscles
from this tutorial, then try to remember these ones, the occipitofrontalis (which I showed
you at the beginning with its occipital and frontal bellies), the orbicularis oculi (which
closes the eyelids), the orbicularis oris here (which purses the lips, closes the mouth)
and the buccinator (which is the muscular component of the cheek wall and which is used
for forcefully expelling air from the mouth). So now I’m just going to cover the remaining
muscles in the oral group of the facial muscles. I’ll break it down into an upper group and
a lower group. So starting laterally, we’ve got the right
risorius. So just by looking at where the muscle inserts, you can get an idea of what
the function of that muscle will be. You can see that the risorius inserts onto the corner
of the mouth. When it contracts, it will retract the corner of the mouth along this direction.
So that’s the risorius and you’ve got these muscles on both sides just (so just that you’re
aware of that). So moving superiorly, we’ve got the zygomaticus
major. And again, looking at the point of insertion, you can see that when this muscle
contracts, it will draw the corner of the mouth in an upward and lateral direction. And just adjacent to the zygomaticus major,
you’ve got the zygomaticus minor. What this muscle does is it inserts onto the upper corner
of the mouth and it draws the lip upwards. Next, we’ve got the levator labii superioris.
And again, the name of this muscle indicates what the function and where it inserts. So
‘levator’ means elevator/lifter, ‘labii’ is Latin for lips and ‘superioris’ means upper,
so it’s the lifter of the upper lip. So immediately, it tells you what the muscle function is. And if we just look a bit closer, we can see
the muscle that lies underneath it. This is the levator anguli oris. So remember, ‘oris/orifice’
refers to the mouth, ‘anguli’ means corner in Latin, so it’s the lifter of the corner
of the mouth. It raises the corner of the mouth. And just medial to that, we’ve got levator
labii superioris alaeque nasi. Now that’s a really long name and it’s just Latin. So
it means lifter of the upper lip and of the alar cartilage of the nose. So ‘labii’ is
lips, ‘superioris’ is upper, ‘alaeque’ means and of the alar cartilage and ‘nasi’ means
of the nose. So this has the function to lift the upper lip and it also opens the nostril,
the alar cartilage part. That’s quite a long one to remember. So just to quickly go over those ones, you’ve
got the risorius here (which is lateral and it inserts onto the corner of the mouth and
which retracts the corner of the mouth), you’ve got the zygomaticus major and minor and then
you’ve got the levator labii superioris and the levator anguli oris. So just moving on to the lower group of oral
muscles. There are a fewer muscles. If you just replace ‘levator’ with ‘depressor’, you
essentially get the muscle names for these group of muscles. So laterally, you’ve got depressor anguli
oris. So if you remember the Latin, ‘anguli’ means corner, ‘oris’ refers to mouth and ‘depressor’
obviously means it depresses, so it depresses the corner of the mouth. This is the most
superficial muscle of the lower group of oral muscles and it depresses the corner of the
mouth. So just moving slightly medially, we’ve got
depressor labii inferioris, the counterpart to levator labii superioris. So this muscle
depresses the lower lip. Again, Latin ‘depressor’ means depressor, ‘labii’ means lip, ‘inferioris’
means lower. So what this muscle does is it depresses the lower lip and the direction
of the fibers means that it also moves it laterally as well. So that’s just deep to
the depressor anguli oris. And then deep to this muscle, the depressor
labii inferioris, you’ve got the mentalis muscle. What this muscle does is it helps
to position the lip for instance, when you’re drinking from a cup or something like that. Those are the muscles of the oral group of
the mouth. There are a lot of muscles and the names are quite long and complicated and
if you just try to memorize them off by heart, it becomes quite hard, so that’s why I tried
to explain to you the meaning of the names because if you think about that, it’s actually
quite simple. So if you think of the corner of the mouth, anguli. If you think of the
position, which lip is it moving, upper or lower (so it would either be superior or inferioris)
and if you think of the action of the mouth, depressor (if it’s on the lower part because
it’s depressing it) and levator (if it’s on the upper part and it’s elevating it). So those are all the muscles which are involved
in producing movements of the mouth, the oral group of muscles. So the final muscle group to talk about is
this muscle around the ear. These are the auricular muscles. You’ve got three muscles.
You’ve got the auricularis posterior, the auricularis superior and the auricularis anterior. Their function is pretty evident from their
position. So the posterior muscle pulls the ear backwards, the superior muscle elevates
the ear and the anterior muscle pulls the ear upwards and forwards. So those are the
auricular muscles. So just to quickly recap, muscles of facial
expression, you’ve got the occipitofrontalis with its two bellies, occipital and frontal
bellies and then you’ve got other muscles of the face, which can be broken down into
the orbital group, the nasal group and the oral group. If you’re just going to remember four muscles,
remember the occipitofrontalis, the orbicularis oculi, the orbicularis oris and the buccinator.
And just remember when you’re remembering any muscles, just trying to think of what
the name means, what the words actually means because they generally help you to remember
the position and the function of the muscle. So that’s the muscles of facial expression.

49 comments

  1. These are great! I also find it really helps memorisation of the names when you explain what the latin words mean
    thanks 🙂

  2. Great videos thanks. Just to let you know, it's pronounced 'buxinator' and one of its most important functions is keeping food out of the sulcus and pushing it onto the tongue during mastication. 🙂

  3. If you want to bulk up, you must make a search on Google for "Aston Muscle Ripper". You are bound to achieve the muscles you deserve.

  4. Thank you so much for this, you made it seem much more understandable for me, it was the Latin names that were wearing me down, but once you explained the meanings of them , it did make it much more simple : )    Just hope my exams next week go OK now – Brilliant A*

  5. 0:00 Buccinator
    1:19 Risorius
    1:55 Zygomaticus Major
    2:14 Zygomaticus Minor
    2:34 Levator Labii Superioris
    3:12 Levator Anguli Oris
    3:32 Levator Labii Superioris Alaeque Nasi
    5:00 Depressor Anguli Oris
    5:25 Depressor Labii Inferioris
    6:06 Mentalis
    7:29 Auricularis Posterior
    7:36 Auricularis Superior
    7:40 Auricularis Anterior

  6. Omg, in my language the names of the muscles are almost always translated so it's SO much easier to know the function, it's like "The elevator of the corner of the mouth muscle".  I didn't know that when teaching in english they keep the latin names … 

  7. I know this might seem crazy and way too fast but I love you. Writing essays on facial muscles isn't really my idea of fun but you make it so much easier 😀

  8. Can anyone point me in the direction of a YouTube video that addresses which particular muscles move in relation to varying emotional states. So rage, anger, laughter, surprise, contentment etc To what extent does muscle movement correlate with human emotion in terms of facial expression? I am interested in this from the perspective of portraiture. How far can we relate the portrayal of human emotion to a systematic understanding of the muscles of the face? This was something address by the french painter Charles le Brun in the seventeenth century – can anyone expand on this?

  9. It would be even better if there would be visual information of origin, insertion, innervation (in this case obvious), and function. However I can imagine this is accompanied with even more work for you. Nevertheless your video are very unique and informative and they help to prepare for exams. Thank you!

  10. I knew something was wrong with Suzanne Somers instructions for her face master facial toning system. I wasn't getting anywhere because I was going in the wrong direction. Thank God I found this site. Thank you. Do you have a suggestion for a lifting the Bucksinator muscle and getting rid of wrinkles around the upper and lower lip? I'm doing a pretty good job of it but I've also just started taking collagen plant-based and using organic vitamin C, argan oil, and a hobo oil on my face which is helping immensely but not without using hydraulic acid which holds a thousand times it's weight in water. So it keeps everything hydrated which causes less wrinkles and sagging ; everything helps. I will be visiting this site often, because I was going mostly sideways instead of up and down but I did have the eye muscle right. I am a 35 + year retired cosmetologist and should remember all of this but I did forget. I'm also a vegan which keeps My Body Young. Thank you for this demonstration.

  11. really nice video and you have explained all the muscles so well..
    keep it up and help us by making more videos sir.

  12. AURICULARIS POSTERIOR
    someone hit my ear 20 years ago and my posterior muscle is break off.
    Is there any surgery to sew it again ? Please tell me my one ear is a little bit different shape angle because of this.

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