Investing layer of deep cervical fascia
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The investing layer of deep cervical fascia is the most superficial part of the deep cervical fascia, and encloses the whole neck.
| Investing layer of deep cervical fascia | |
|---|---|
Section of the neck at about the level of the sixth cervical vertebra. Showing the arrangement of the fascia coli. | |
| Details | |
| Identifiers | |
| Latin | lamina superficialis fasciae cervicalis |
| TA98 | A04.2.05.002 |
| TA2 | 2207 |
| FMA | 57805 |
| Anatomical terminology | |
It is considered by some sources to be incomplete[1] or nonexistent.[2]
Attachments
It surrounds the neck like a collar, it splits around the sternocleidomastoid muscle and the trapezius muscle. It is attached as;
- Posteriorly - Ligamentum nuchae
- Anteriorly - Attached to the hyoid bone
- Superiorly - (from backwards to forwards);
- External occipital protuberance and superior nuchal line of occipital bone
- Mastoid process of temporal bone
- External acoustic meatus
- Lower margin of the zygomatic arch
- Lower border of body of mandible from the angle of mandible to the symphysis menti
- Inferiorly - (from backwards to forwards);
- Spine and acromial process of scapula
- Upper surface of the clavicle
- Suprasternal notch of manubrium sterni[3]
Tracings
- Horizontal extent - From ligamentum nuchae when traced forward, the fascia splits and encloses trapezius, reunites and form roof of posterior triangle of neck; again splits and encloses sternocleidomastoid, reunites and forms the roof of anterior triangle.
- Vertical extent -
- Superior tracing - It splits and encloses submandibular gland and parotid gland;
- It splits at lower border of submandibular gland into superficial and deep layers;which attach to lower body of body of mandible and mylohyoid line of mandible - It splits at lower pole of parotid gland into superficial and deep layers; superficial layer attaches to zygomatic arch and forms parotido-masseteric fascia after blending with masseter, deep layer attaches to tympanic plate and styloid process forming the stylomandibular ligament
- Inferior tracing - The fascia splits to enclose two spaces; suprasternal space and supraclavicular space[4]
