b) Pretracheal layer
It is limited to the front part of the neck, but more extensive than the name suggests |
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Attachments |
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- From hyoid bone to the superior mediastium.
- Oblique lines of thyroid cartilage
- Cricoid cartlage
- The pericardium, and T. adventitia of the bases of great vessels.
- Becomes continous with bucopharyngeal fascia covering constrictor muscles behind.
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Structures sorrounded/ enclosed |
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- Thyroid gland (1)
- Infrahyoid muscles
- Air and food passages
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| Modifications |
- The fascia at the back of the thyroid lobe is thickened to form a lateral ligament or “ligament of Berry” which gains attachment to the cricoid cartilage.
- At the level of the thyroid isthmus a looser attachment of the pretracheal fascia occurs infront of trachea.
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