THE SACRAL PLEXUS Gross anatomy - Dr G Bhanu Prakash Usmle Animated Lectures
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THE SACRAL PLEXUS Gross anatomy - Dr G Bhanu Prakash Usmle Animated Lectures
Sacral plexus
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The sacral plexus is a network of nerve fibres that supplies the skin and muscles of the pelvis and lower limb. It is located on the surface of the posterior pelvic wall, anterior to the piriformis muscle.
The plexus is formed by the anterior rami (divisions) of the sacral spinal nerves S1, S2, S3 and S4. It also receives contributions from the lumbar spinal nerves L4 and L5.
In this video , we shall look at the anatomy of the sacral plexus - its formation and major branches.
The sacral plexus is formed by anterior rami of L4 to S5 and its branches innervate the pelvis, perineum and lower limb.
Gross anatomy
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The sacral plexus forms on the anterior belly of the piriformis muscle and is formed by the lumbosacral trunk (L4-5) of the lumbar plexus, which enters the pelvis coursing medially to psoas major and unites with the ventral rami of the S1 to S4 nerve roots, which emerge from the anterior foramen of the sacrum. It forms a triangular shape with an inferiorly pointing apex.
The anterior sacral rami give off six branches and then divide into the anterior and posterior division, each giving off further branches (see below).
Branches
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Anterior rami
nerve to piriformis (S1-S2)
perforating cutaneous nerve (S2-S3)
posterior femoral cutaneous nerve (S1-S3)
parasympathetic pelvic splanchnic nerves (S2-S4)
pudendal nerve (S2-S4)
perineal branch (S4)
Anterior division of anterior rami
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nerve to quadratus femoris and inferior gemellus muscles (L4-S1)
nerve to internal obturator and superior gemellus muscles (L5-S2)
tibial portion (L4-S3) of the sciatic nerve (L4-S3)
Posterior division of anterior rami
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superior gluteal nerve (L4-S1)
inferior gluteal nerve (L5-S2)
common peroneal portion (L4-S2) of the sciatic nerve (L4-S3)
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선생님, 감사합니다. 덕분에 공부 잘하고 있습니다. ^^
My favorite doctor 🙂
Excellent sir!
I wish I knew this channel earlier. Very useful video. Thank you.
@doctorbhanuprakash
4 жыл бұрын
Glad it was helpful!
Marvelous sir
Awesome sir❤️❤️❤️❤️
Excellent
This video is so helpful for me thanks so much
Nice description sir
Excellent stuff. Thank you again, Dr. Parkash. Western University is primarily using Netters, which teaches that the anal, and posterior aspect of the labia/scrotum is associated with the pudendal nerve rather than the posterior cutaneous nerve of the thigh. Would it be safe to say that it is variable in real patients? And what is the significance of ventral vs dorsal divisions of nerve segments in the sacral plexus?
Now sacral plexus is clear 🥳
very nice sir...your lectures are very helpfu
@doctorbhanuprakash
6 жыл бұрын
+Syed Yasirshah thank u
sir awesome explanation......sir please make a videos on muscles
Excellent presentation. Sir can I know how do you create such a great animation.what software do you use? Do you outsource your work?
@doctorbhanuprakash
6 жыл бұрын
i have my own company called proceum
So helpful 🙏🏾
@doctorbhanuprakash
4 жыл бұрын
Glad it was helpful!
Thank you sir 😊🙏
@doctorbhanuprakash
8 ай бұрын
Most welcome
Thank you bhai 😊
@doctorbhanuprakash
8 ай бұрын
Most welcome
Thx
Sir plz upload video pudendal nerve,artery
Great
@doctorbhanuprakash
4 жыл бұрын
🤝🤝🤝
Alhamdulillah Fantastic sir......
@doctorbhanuprakash
Жыл бұрын
Tysm
Hi dr . where is your clinic
Simply Great. I already subscribed 👍👍👌
10 stars
Sir how can I get all anatomy lectures?? I m first year Medical student
@doctorbhanuprakash
4 жыл бұрын
Contact : +919885588972 ( whatsapp )
Sir pls upload intercostal nerves video
@doctorbhanuprakash
6 жыл бұрын
+kurakula lahari yeah i will
@lahari4610
6 жыл бұрын
sir i need it urgently
To the point and precised lectures It's very interesting and helpful Although There is no need to give it a read But Which book to consult for this topic
@doctorbhanuprakash
2 жыл бұрын
I follow dr vishram singh and Grey's student edition
@r_aorwa
2 жыл бұрын
@@doctorbhanuprakash Okay Thanks a lot Sir Your way of teaching is excellent Keep it up Keep uploading
حجي كلشي ما افتهمت💔💔