Latissimus Dorsi Anatomy: Origin, Insertion & Action

[@Zaki-zg5lt]

What did you mean by 3rd or 4th rib

[@BodyworksPrime]

Good question, I probably should have mentioned this in the video. I will pin your comment so others can find this who may have the same question. There can be some individual variation between the exact origin point on the ribs. For example, Person A has the latissimus dorsi connected to their inferior 1st, 2nd and 3rd rib. Person B has theirs connected to the inferior 1st, 2nd, 3rd AND 4th rib.

[@Zaki-zg5lt]

@@BodyworksPrime Thanks for your reply I don't understand how the serratus anterior protracts the scapula can u provide me with a video for its contraction while hiding the scapula and showing the muscle and the ribs only I think this might help me finding an answer

[@Zaki-zg5lt]

@@BodyworksPrime You mean like me having three incisors on my lower teeth while most of the people have 4 incisors?

[@BodyworksPrime]

@@Zaki-zg5lt yes it's as similar sort of thing. In the world of muscles there are actually some people who are totally missing some muscles entirely too. They're usually just minor muscles though. For example, the muscle called 'palmaris longus' located in the forearm/wrist is totally missing in around 15% of people. As for the serratus anterior, the origin is located towards the front of the body on the ribs. The insertion is located on the medial border of the scapula (towards the back of the body). Contracting the serratus anterior pulls the origin and insertion closer together. Which is how it causes protraction as it pulls it forward across the surface of the ribs. Check out the article on the website for some more details on the serratus anterior: bodyworksprime.com/serratus-anterior/

[@Zaki-zg5lt]

@@BodyworksPrime thanks alot

[@Athonite]

I like the clean and concise format you have set up here. Very useful for my current anatomy course!

[@BodyworksPrime]

Thank you! Glad it was helpful!

[@kivizerimar4031]

Hello Bodyworks Prime, I just found your channel. I subscribed to it because I’m a visual learner and I loved and appreciate that you give examples of the actions of each muscles. Thank you so much !!

[@BodyworksPrime]

You are so welcome! Thanks for subscribing, it's great to hear you have found the videos helpful.

[@user-ss9rx4yw2k]

Hello! currently studying for my lab practical I found your page right on time thank you for your videos you make learning easier.

[@s.bhaskar1736]

Medial rotation is surprising!! Nice work 👏 👌 👍

[@BodyworksPrime]

Thanks! It's definitely a less known action. It works alongside the subscapularis, teres major, pectoralis major, and the anterior fibres of the deltoid to accomplish the medial rotation.

[@slavicus2046]

I don't see any difference between arm adduction and extension, please explain?

[@BodyworksPrime]

If you held your arms out away from your body, to your sides, that would be shoulder aBduction. Lowering them back to the body would be shoulder aDDuction. If you held your arms out directly in front of you that would be shoulder flexion, as your lowered them back down that would be extension. Hope that helps :)

[@kayleekorpi]

Concise, kinesthetic learning with skeleton. I only wish the images in top corner showed the LD muscle doing the action. Thank you!

[@BodyworksPrime]

Thanks for the feedback, glad you liked the video.

[@lirongwang1466]

Thank you!

[@mazenm9690]

Great work

[@BodyworksPrime]

Thanks!

[@amnashahid255]

Thankue so much It was a great help. Love from Pakistan ❤️🤗.

[@BodyworksPrime]

Thanks Amna! Happy to hear the video was helpful 😊

[@Work_improve]

This setup is clean

[@BodyworksPrime]

Thank you!

[@marcocfitness]

good work as always!

[@BodyworksPrime]

Thank you! Appreciate the support.

[@lucky.thoughts]

Thank you so much for this video!! So helpful 🙏🏽💚

[@BodyworksPrime]

Most welcome, happy to hear it was helpful. Thanks for watching!

[@user-lv7io4xz4r]

Thx❤❤❤

[@eaglevision6306]

Superb bro

[@BodyworksPrime]

Thanks!

[@Mikesennna]

👏👏👏👏👏👏

[@cementos7922]

how can 1 muscle do 3 actions, when all it can do is contract.

[@BodyworksPrime]

Muscles are made up of fibers. These fibers are innervated by neurons. This gives the muscle a way to preferentialy contract certain muscle fibers. The deltoid is a good example of this. It is one muscle, but the anterior part contracting can flex the shoulder, the lateral part abducts the shoulder and the posterior part extends the shoulder. If you look up 'motor units' that would be a good starting place for learning about how it works. Hope that helps :)

[@cementos7922]

@@BodyworksPrime it did, thanks

[@radwawahed3759]

♥️♥️♥️♥️♥️♥️