1 / 22

Triangles of the Neck

Triangles of the Neck. Sanjaya Adikari Department of Anatomy. Spinous process of C 7. Acromian. Boundaries of the neck. Compartments of the neck. Neck has 4 major compartments Vertebral compartment Cervical vertebrae and associated muscles Visceral compartment

ivan-dale
Download Presentation

Triangles of the Neck

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Triangles of the Neck Sanjaya Adikari Department of Anatomy

  2. Spinous process of C7 Acromian Boundaries of the neck

  3. Compartments of the neck Neck has 4 major compartments • Vertebral compartment • Cervical vertebrae and associated muscles • Visceral compartment • Parts of respiratory and digestive tracts, important glands (thyroid, parathyroid and thymus) • Two vascular compartments • Contains major blood vessels and vagus nerve

  4. Compartments of the neck

  5. Cervical fascia Superficial Contains platysma muscle, cutaneous nerves, superficial veins and superficial LNs Deep

  6. Deep cervical fascia • Consists of 4 parts • Investing layer • Encircles the neck completely • Pretrachial fascia • Encircles the visceral compartment • Prevertebralfascia • Encircles the vertebral compartment • Carotid sheaths • Enclose the two vascular compartments

  7. Investing layer • Splits to enclose the parotid gl. • Superficial layer forms parotid fascia & attached to zygomatic arch Mandible Mastoid p. E.O. protuberance & s. nuchal line Acromian & spine L. nuchae Clavicle Manubrium

  8. Investing layer • Deep layer forms stylomandibular ligament between styloid process & angle of mandible Stylomandibular ligament Mandible Mastoid p. E.O. protuberance & s. nuchal line Acromian & spine L. nuchae Clavicle Manubrium

  9. Prevertebral fascia • Lies in front of prevertebral muscles • Extends from skull base to T4 body getting attached to anterior longitudinal ligament • Extends around the subclavian artery and brachial plexus and becomes axillary sheath • Phrenic nerve lies behind • Sympathetic trunk lies in front • Cutaneus branches of Cx plexus pierce it

  10. Pretrachial fascia

  11. Vagus nerve Anterior Carotid sheath

  12. Triangles of the neck

  13. Posterior triangle - contents • External jugular vein after piercing the investing layer. • Accessory nerve • Branches of Cx plexus • Lesser occipital • Great auricular • Transverse cervical • Supraclavicular

  14. Floor of the posterior triangle • Prevertebral fascia lying on the muscles • Semispinalis capitis • Splenius capitis • Levator scapulae • Scalenus medius • Scalenus anterior

  15. Anterior triangles of the neck

  16. Anterior triangle of the neck • Suprahyoid muscles • Digastric: poterior belly by facial N. & anterior belly by nerve to mylohyoid • Stylohyoid: by facial nerve • Mylohyoid: by nerve to mylohyoid, a branch of inferior alveolar nerve (mandibular division) • Geniohyoid: by C1 through hypoglossal nerve

  17. Anterior triangle…. • Infrahyoid muscles • Sternohyoid • Omohyoid • Thyrohyoid • Sternothyroid These are depressors of the larynx. Supplied by ansa cervicalis (C1-C3)

  18. Carotid triangle • Tip of the greater horn of hyoid is an important reference point • Note the relationships of hypoglossal nerve

  19. Root of the neck • All structures that pass between the head and thorax or upper limb and thorax must pass through the root of the neck

  20. Subclavian Artery • 1st part of subclavian artery • Vetebral A • Internal thoracic A • Thyrocervical trunk • 2nd part of subclavian artery • Costocervical trunk • 3rd part of subclavian artery • Dorsal scapular A

  21. Thoracic duct in the neck • Join the junction between the left subclavian and internal jugular veins

More Related