You say , "...we say the origin of the [external intercostal] is the rib above...the insertion is pulled towards the origin...if the muscle were to contract it would pull this [lower] rib upward..." However, this doesn't really explain anything. Why doesn't the external intercostal (EI) pull the upper rib down? I've tried to find a biomechanical mechanism for why the external intercostals pull the ribs up, and it is very hard to find. The best explanation I could find is that the attachment of the EI to the upper rib is closer to the costovertebral joint, therefore the EI muscle has less leverage on the upper rib, and conversely more leverage, or a larger moment arm on the lower rib. The force on the two ribs is equal and opposite, but the greater moment arm on the lower rib means it moves up.
Love the batman and Robin reference. This was so incredibly helpful, I wish more people would see it.
That was an excellent video. It should be shown to all students in healthcare.
Thank you very much, Professor. I wish that my medical school professors are as clear as you are!!!!
Istg
I am from India.
Nice explaination Sir
Thanks
Awesome .. marvellous
Thank you sir..your explanation gives much to understand basic of any structures
Superb explanation with diagrams👍👍👌🏻
Thank you, was real helpful
Great video!!!!!!!!!
AMAZING
You say , "...we say the origin of the [external intercostal] is the rib above...the insertion is pulled towards the origin...if the muscle were to contract it would pull this [lower] rib upward..." However, this doesn't really explain anything. Why doesn't the external intercostal (EI) pull the upper rib down? I've tried to find a biomechanical mechanism for why the external intercostals pull the ribs up, and it is very hard to find. The best explanation I could find is that the attachment of the EI to the upper rib is closer to the costovertebral joint, therefore the EI muscle has less leverage on the upper rib, and conversely more leverage, or a larger moment arm on the lower rib. The force on the two ribs is equal and opposite, but the greater moment arm on the lower rib means it moves up.
I know I'm too late.. I think understanding myosin and actin, those are responsible for muscles contraction, can answer your question.
Amazing.you saved me from being depressed again 😪
Where did you take the figures from?
love your videos!!
Thank you was very useful
Great video
incredible
Good video
Thank you so much for the video.. I hope you continue to make more 💛
Thanks a lot for the video, it was surely helpful
much helpful
Thank you
Thanks Sir ❤️
I have a question: how all this information is being stored inside a single cell?
Damned good video!!!
The name of the book contains this information
I thought the Innermost intercostal muscle isn't replaced by a membrane??
yeah me too, I tried to find sources that mentioned it but I couldn't.
the origin insertion and action of internal intercostal muscle has been taught wrong. it's actually the opposite of what's been told.
Can you please explain?
👍👍👍
Thank you