Serratus Posterior Inferior Muscle Overview - Human Anatomy | Kenhub
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- Опубліковано 12 вер 2024
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The serratus posterior muscles are two thin, superficial back muscles which lie above the intrinsic back musculature. They are also referred to as spinocostal muscles. The serratus posterior muscles are comprised of the serratus posterior superior muscle and the serratus posterior inferior muscle. Both originate from the spinous processes and attach on the ribs.
The serratus posterior inferior muscle originates from the spinous processes of the T11 to T12 thoracic vertebrae and has its insertion on the four lower ribs. Both muscles are known to be among the secondary back muscles, meaning that they migrated to the back in the course of embryogenesis. Therefore, their nerve supply comes from the posterior branches of the spinal nerves, the intercostal nerves. The serratus posterior muscles contribute to the movement and stabilization of the vertebral column and the thorax.
In this video, we cover:
0:11 Definition of the serratus posterior muscles
0:42 Origin and insertion of the serratus posterior inferior muscles
0:55 Innervation of the serratus posterior inferior muscles
1:12 Function of the serratus posterior inferior muscles
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Read more on the serratus posterior inferior muscle in this article, where we also cover scapulocostal syndrome: khub.me/orgp4
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@Kenhub - Learn Human Anatomy is it possible to injury it by execising abs every day so it is painful as I breath more deeper?
useful but origins are:
T11, T12 ,L1 and L2
that's what I was thinking
Muy buen video lo traduje al español y comprendi perfectamente todo, me ayudo bastante con mi exposicion de la clase de fisiologia del ejercicio
The origin of the muscle is wrong , it originates from T11 to L2 , please correct it.
Although the picture is correct.
U really make it look easy
Can someone try and explain to me how he is explaining how these muscles work to move the lower spine and stabilize the body? I'm a bodybuilder and started noticing these on my body... I want to further develop them and create better symmetry between both sides. Any help is much appreciated!
+Chris McDanel Hi Chris, I believe the answer is on the attachment points of those muscles. Being attached on the spine and ribs, and the symmetry of the muscles, really helps create some stability in the upper and lower backs. As for exercises, I think someone who is in sports medicine or coaching would be better qualified to give you some exercises to help further develop them.
short & cool with great audio
Origin T11 thru L2
+John Genco Hi John, that is a good point. We forgot to add the upper lumbar vertebrae as origin points for this muscle. Will rectify this ASAP and bring our the new corrected video. Thanks!
Oh snap...my lab book says the origin is T11-L3. Guess it depends?
I think my book's just wrong...there's clearly 4 attachments for the origin, not 5.
@@Kenhub It's been 4 years since this comment but the lumbar proximal attachments are still missing from this video
I have this muscle aching for last 7 years. I didnt know about real problem so chronic pain ended in putting more pressure on spine causing 4 discs to dehydrate on different stages.
mine too... hurts like hell...
Thank you ❤
The origin is T11 - L2 (not T12)
Any info on how to strengthen this muscle? I can't find strengthening exercises anywhere just stretching... any help appreciated 🙏
Should have described how it depresses the rib
thank u guys
///that s great
Serratus posterior inferior does not rotate unilaterally to opposite side. That would elongate the fibers. Unilaterally, it rotates to the same side.
Dear Jeremy,
If you take the ribs as the punctum fixum and contract the muscle, the spinous processes get pulled towards the muscle. This in return means a rotation of the vertebrae to the opposite direction. Please keep in mind that the direction of the vertebral rotation is named after the direction the anterior surface of the vertebral body takes, not the spinous process :-)
I was thinking the same as Jeremy but then I saw your explanation. I think I understand and we were looking at it from the wrong perspective i.e. with a different punctum fixum. To confirm: if I was to look maximally over my right shoulder would you expect to observe contractions in my left SPS and my right SPI?
my understanding is that the post. inf. serratus m's sideband the spine toward the contracted side, like the erectors, and there is corresponding rotation of the vertebral bodies away from the sidebend.....
hhmmm I thought the Origin of the muscle doesnt move, the insertion of the muscle contracts towards the origin, therefore, in this case, the ribs move towards the SPsduring contraction, however, Ken hub is saying different…
Should have described the depression
superb
Thanks for your great feedback :)
What causes nerve pain their? Which nerves besides intercostal are functioning here
pulled this.. hurts like bish
im feeling that rn all bad
How you been feeling
What did you do to feel better
Is this what I see activating here, or is it my lats? (major visible muscle on left side during pull-ups)
ua-cam.com/video/VjkooOB5r70/v-deo.html
+DFKnightmare In order of activation, during pull ups the latissimus dorsi is the most active, then biceps brachii, infraspinatus, lower trapezius, pectoralis major, erector spinae, and external oblique. On your video, we can clearly see the latissimus dorsi and trapezius in action. Thanks for sharing!
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