13 POSTERIOR TRIANGLE BOUNDARIES — Transcript

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1. 0:14Now we will talk about the posterior
2. 0:16triangle. This part here is the
3. 0:18posterior triangle. This is the neck
4. 0:20here. The sternocleidomastoid came and
5. 0:24divided the neck. Triangle. And this is
6. 0:27the posterior triangle. The boundaries
7. 0:29of the posterior triangle. This is it.
8. 0:37And then. The anterior border of the
9. 0:42trapezius. That here is the border of
10. 0:44the trapezius. The floor. The fascia
11. 0:49covering the scalenus medius. Here is
12. 0:52one, the levator scapulae is right here
13. 0:56. And then here is the splenius capitis
14. 0:58. And the last one above, sometimes
15. 1:02present, is called the semispinalis
16. 1:05capitis. So, for the floor, the first
17. 1:08thing. The fascia covers the first
18. 1:11thing, the scalenus medius. Levator
19. 1:14scapulae, splenius, and semispinalis
20. 1:17capitis. When we come to the roof, we
21. 1:20have the skin. The skin in this area, I
22. 1:24have taken a cross-section of it here.
23. 1:27It should be skin and superficial
24. 1:28fascia. This is fascia, here is the
25. 1:31skin. After that, the superficial
26. 1:34fascia contains the platysma. Here is
27. 1:36the muscle, the cross-section clearly
28. 1:38shows these parts of the platysma
29. 1:40muscle. There should be supraclavicular
30. 1:43nerves. And then there is the external
31. 1:46jugular vein. There is deep fascia here
32. 1:49in the roof, which is the investing
33. 1:51layer of the. Deep fascia of the, the
34. 1:55deep fascia of the neck, it surrounds,
35. 1:57cuts around, it runs like this over the
36. 2:00posterior triangle, but comes behind.
37. 2:05From the posterior side, it embraces or
38. 2:08surrounds the trapezius. And from the
39. 2:11front, it surrounds the
40. 2:12sternocleidomastoid. So it is from.
41. 2:15Behind, it is split, surrounding this
42. 2:17muscle called the trapezius, and in
43. 2:20front, it surrounds this muscle called
44. 2:22the sternocleidomastoid. So, the roof,
45. 2:26if we take a section in the roof, we
46. 2:29will find skin, fascia containing the
47. 2:31platysma muscle, supraclavicular nerves
48. 2:34, external jugular vein, and deep
49. 2:36fascia. And it surrounds around here.
50. 2:40From behind, the trapezius. From the
51. 2:43front, the sternocleidomastoid. In the
52. 2:46next colored image, we will see this
53. 2:48mentioned here as well. This is what we
54. 2:51see here. You will find these are the
55. 2:55boundaries. I have a border. Border of
56. 3:04the trapezius. The floor here is the
57. 3:07scalenus. Here is the levator scapulae.
58. 3:11Here is the splenius capitis. Here is
59. 3:15the splenius capitis. And number four,
60. 3:18which is this, is the splenius capitis.
61. 3:22And number four is the semispinalis
62. 3:25capitis. So. And then. Of the.