Investing layer of deep cervical fascia
| 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 | |
The Investing layer of deep cervical fascia is the most superficial part of the deep cervical fascia, and it encloses the whole neck.
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[1]
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[2]
Existence
It is considered by some sources to be incomplete[3] or nonexistent.[4]
References
This article incorporates text in the public domain from page 388 of the 20th edition of Gray's Anatomy (1918)
- ^ Dutta, Asim Kumar (2013). Essentials of Human Anatomy Head & Neck. kolkata: Current books international. p. 126. ISBN 978-81-86793-79-4.
- ^ Dutta, Asim Kumar (2013). Essentials of Human Anatomy Head & Neck. kolkata: Current books international. pp. 126–128. ISBN 978-81-86793-79-4.
- ^ Zhang M, Lee AS (2002). "The investing layer of the deep cervical fascia does not exist between the sternocleidomastoid and trapezius muscles". Otolaryngol Head Neck Surg. 127 (5): 452–4. doi:10.1067/mhn.2002.129823. PMID 12447241. S2CID 19627402.
- ^ Nash L, Nicholson HD, Zhang M (2005). "Does the investing layer of the deep cervical fascia exist?". Anesthesiology. 103 (5): 962–8. doi:10.1097/00000542-200511000-00010. PMID 16249670. S2CID 20959436.
