====== DEEP CERVICAL FASCIA ======

  * deep cervical fascia
    * pretracheal fascia
      * encloses and suspends thyroid gland
      * attachments
        * superiorly
          * hyoid bone in median plane
          * oblique line of thyroid cartilage laterally
          * cricoid cartilage
        * inferiorly
          * encloses inferiior thyroid veins
          * blends with arch of aorta and pericardium
        * on either side
          * forms front of carotid sheath
    * buccopharyngeal fascia
      * covers superior constrictor muscle externally
      * extends on superficial aspect of buccinator muscle
    * pharyngobasilar fascia
      * thickened between
      * upper border of superior constrictor
      * base of skull
    * prevertebral fascia
      * lies infront of prevertebral muscles
      * attachments
        * superiorly
          * attached to base of skull
        * inferiorly
          * extends in to superior mediastinum to split in to
            * anterior
              * blends with buccopharyngeal fascia
            * posterior layers
              * attached to body of T4 vertebra
              * also attached to anterior longitudinal ligament
        * laterally
          * lies deep to trapezius muscle
          * attached to fascia of sternocleidomastoid
        * anteriorly
          * separated from pharynx and buccopharyngeal fascia by
            * retropharyngeal space
              * retropharyngeal abscess
            * lower part prevertebral fascia and buccopharyngeal fascia fuse
     * other features
        * cervical plexus and brachial plexus behind this fascia
        * axillary sheath
    * investing layer
      * deep to platysma
      * forms roof of posterior triangle
      * attachments
        * superiorly
          * external occipital protuberance
          * superior nuchal line
          * mastoid process, styloid process
          * external acoustic meatus , tympanic plate
          * base of mandible
          * superificial lamina
            * splits fo form parotid fascia
        * inferiorly
          * spine of scapula
          * acromion process
          * clavicle
          * manubrium
        * anteriorly
          * symphysis menti
          * hyoid bone
      * other features
        * splits to enclose
          * muscles
            * trapezius
            * sternocleidomastoid
          * salivary gland
            * submandibular
              * while cutting this gland external carotid artery must be secured
            * parotid gland
              * parotid swelling are painful
          * space
            * suprasternal
              * containsright and left  sternocleidomastoid heads  
              * jugular venous arch
              * interclavicular ligament
              * lymph node
            * supraclavicular
              * traversed by
                * external jugular vein
                   * clinically division of vein can cause air embolism
                * supraclavicular nerves
    * carotid sheath
      * relations
        * anterior wall
          * ansa cervicalis
        * cervical sympathetic chain lies behind the sheet plastered to prevertebral fascia
        * overlapped by anterior birder of sternocleidomastoid
      * content
        * common or internal carotid arteries
        * vagus nerve
        * internal jugular vein


{{:maps:deep_cervical_fascia.svg}}

===== INVESTING LAYER  =====


===== PRETRACHEAL FASCIA =====


===== PREVERTEBRAL FASCIA =====

{{:anatomy:fascia-deep-investing.png}}
{{:anatomy:fascia-deep.png}}
{{:anatomy:fascia-pretracheal.png}}
{{:anatomy:fascia-prevertebra.png}}
{{:anatomy:fascia-tissue_spaces.png}}