anatomy of deep cervical fascia, the layers and the extend of deep fascia. contents of the layers and their clinical significance

1. DEEP CERVICAL
FASCIA
DR SANA YASEEN
ANATOMY DEPARTMENT
KIMS

2. INTRODUCTION
 Composed of;
1. Investing layer
2. Pretracheal layer
3. Prevertebral layer
4. Carotid sheath
5. Buccopharyngeal fascia
6. Pharyngobasilar fascia

4. INVESTING LAYER
 Deep to platysma muscle
 Surrounds necks like collar
 Forms roof for the posterior triangle
of neck
EXTEND;
 SUPERIORLY:
EOP+superior nuchal line+ mastoid
process+ base of mandible
 INFERIORLY:
Scapula (spine)+ acromion
process+clavicle+ manubrium sterni+
 POSTERIORLY
Ligamentum nucha+ C7 spine
 ANTERIORLY
Hyoid bone+ symphysis menti

6. PRETRACHEAL FASCIA
 SUPERIORLY
Hyoid bone+ thyroid cartilage+ cricoid cartilage
 INFERIORLY
Below thyroid gland encloses inferior thyroid veins an blend with arch of
Aorta
 ON EITHER SIDE
Fuses with carotid sheath

10. PREVERTEBRAL FASCIA
 Lies in front of prevertebral muscle
 Forms floor of triangle of neck
 SUPERIORLY
Base of skull
 INFERIORLY
Attach to anterior longitudinal ligament + body of T4 body.
 ANTERIORLY
Associate with retropharyngeal space separating it from pharynx+ buccopharyngeal fascia
 LATERALLY
Disappears below trapezius

13. BUCCOPHARYNGEAL
FASCIA
 Covers the muscles
 SUPERIORLY: SKULL
 LATERALLY: PARAPHARYNGEAL SPACE
 POSTERIORLY: retropharyngeal space
 INFERIORLY: continues with the coveing of pharynx and esophagus

14. PHARYNGOBASILAR FASCIA
 Is thickened between upper border of superior constrictor muscle and base of skull
 Lies deep to pharyngeal muscle
 anterior aspect of the fascia posses a defect “ sinus of morgagni” contaning eustatian tube
and levator veli palatini muscle
 Attachment
 SUPERIORLY: occippital bone+ petrous part of temporal bone
 INFERIORLY: superior pharyngeal constrictor muscle
 ANTERIORLY: medial pterygoid plate
 POSTERIORLY: midline pharygeal raphe
 Lies between : levator veli palatini , tensor veli palatini

16. CAROTID SHEATH
 Is the condensation of
fibroareolar tissue around
main vessel of neck