Neck Anatomy - Organisation of the Neck - Part 1 — Transcript

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1. 0:01okay so this is a tutorial on the
2. 0:03organization of the neck so I'm going to
3. 0:06talk a little bit about the an
4. 0:07anatomical triangles of the neck the
5. 0:10anterior and posterior triangles and
6. 0:12then I'll go on to talk about the
7. 0:13fascial compartments I'll also talk a
8. 0:15little bit about the different
9. 0:17structures that pass through the um
10. 0:20anatomical triangles but I'll go into
11. 0:22more detail on other tutorials on
12. 0:24this so we're looking at an anterior
13. 0:28view of the neck and you can see these
14. 0:30thin muscles here so this is the platisa
15. 0:33muscle and this is comp contained in the
16. 0:36superficial fascia of the neck so I'll
17. 0:38get rid of these um and show you the
18. 0:43different
19. 0:44triangles so if I just zoom in a little
20. 0:46bit more I've got rid of the platisa
21. 0:48muscle which lies in The Superficial
22. 0:51fascia and then you can see this big
23. 0:53muscle here which
24. 0:55runs from the mastoid
25. 0:58process down to attach onto the sternum
26. 1:02and also onto the clavicle so it's got
27. 1:04two attachments a sternal and a a
28. 1:09sternal and a cicular attachment and
29. 1:11it's also attached to mastoid process up
30. 1:14here so this is the Sterno clom mastoid
31. 1:19muscle named because of its um
32. 1:24attachments so the anterior triangle of
33. 1:27the neck is defined by a few boundaries
34. 1:31so the
35. 1:32inferior border of the mandible forms
36. 1:36the superior border of the
37. 1:39triangle the midline forms the medial
38. 1:43border and the anterior border of the
39. 1:46stoc clom mastoid muscle forms the
40. 1:49lateral border of the triangle so the
41. 1:52triangle is this here the midline
42. 1:57inferior surface of the mandible
43. 2:02so you've got the inferior surface of
44. 2:04the mandible forming the superior border
45. 2:07you've got the anterior border of the
46. 2:10stoco
47. 2:11mastoid forming the lateral border and
48. 2:15the midline of the neck which
49. 2:17one's right down here forms the medial
50. 2:20border so that's the anterior triangle
51. 2:22of the
52. 2:23neck so as you can see here there are
53. 2:26several
54. 2:28structures which run in the anterior
55. 2:30triangle of the neck and I won't go into
56. 2:32huge detail on what these are but I'll
57. 2:35just quickly go through them so you can
58. 2:37see these this bone here this is the
59. 2:39hyid
60. 2:41bone and this bone is important because
61. 2:43it forms the attachment for many muscles
62. 2:47which make up the floor of the mouth and
63. 2:49it it provides attachment for the tongue
64. 2:52muscles and it's involved in swallowing
65. 2:55so this is the H hyoid
66. 2:58bone muscles above it are called the
67. 3:01super Hy muscles and these run in the
68. 3:02anterior triangle and you've got these
69. 3:05muscles below the H bone so these are
70. 3:08the infrahyoid
71. 3:11muscles just these infrahyoid muscles
72. 3:14are also called strap muscles because of
73. 3:16their appearance I guess they look like
74. 3:17a strap so these are the strap
75. 3:20muscles below the strap muscles we've
76. 3:23got the thyroid gland we've got the
77. 3:26larynx here and the track here and we've
78. 3:29also got the um parathyroid glands
79. 3:33behind the
80. 3:36thyroid and then also you've got these
81. 3:39um vessels which obviously run in the
82. 3:42anterior triangle so you've got the
83. 3:43common cored and its branches so the
84. 3:45external and um internal cored and
85. 3:49you've got the internal jugular vein
86. 3:53running through the anterior triangle
87. 3:54and then you've also got nerves so for
88. 3:57instance the Vagas nerve and recurrent
89. 3:58Len Gill nerve run through the anterior
90. 4:03triangle so that's the anterior triangle
91. 4:07just to recap it's formed by the
92. 4:10anterior border of the stoc cloudo
93. 4:11mastoid the inferior margin of the
94. 4:14mandible and the midline of the
95. 4:17neck so the posterior
96. 4:21triangle lies just behind the anterior
97. 4:23triangle um and it's formed by the
98. 4:26posterior border of the stoco mastoid
99. 4:29the mid middle portion of the clavicle
100. 4:33and the anterior Board of the trapezius
101. 4:35muscle so this big this big muscle at
102. 4:37the back big powerful muscle
103. 4:44there so the apex of the posterior
104. 4:47triangle is this bit of occipital bone
105. 4:50just behind the mastoid process here so
106. 4:54you can see the triangle formed by the
107. 4:56anterior margin of the trapezius the
108. 5:00middle portion of the clavicle and then
109. 5:03the posterior border of the stocl
110. 5:06mastoid with this Apex just behind the
111. 5:09mastoid
112. 5:13process so again the posterior
113. 5:18triangle um of the neck contains a lot
114. 5:20of important structures not going to go
115. 5:22through all of them but just a few so