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Introduction to the Neck

Introduction to the Neck

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Introduction to the Neck

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  1. Introduction to the Neck Dan Topping, MD Clinical Assistant Professor Head and Neck Anatomy February 20, 2008

  2. The neck is a biomechanical wonder! • Connects the head to the trunk • Conduit for blood vessels, nerves, and hollow organs • All of these complicated structures are packed in a very narrow area that allows for a great deal of mobility for the head as it moves relative to the ground

  3. Emergency Cricothyroidotomy Step One: Transverse skin incision over CT membrane

  4. Emergency Cricothyroidotomy Step Two: Pop through the membrane and make some space

  5. Emergency Cricothyroidotomy Step Three: Create an orifice (straw, ballpoint pen, etc.)

  6. Emergency Cricothyroidotomy Improvise if you have to!

  7. Sternocleidomastoid • Flexes and rotates the head • Innervation is by CN XI

  8. Trapezius • Moves and stabilizes the scapula, extends the head • Innervation is by CNXI

  9. Suprahyoid Muscles

  10. Suprahyoid Muscles (geniohyoid)

  11. Infrahyoid (Strap) Muscles

  12. Actions of Suprahyoid and Infrahyoid Muscles

  13. Deep Cervical (Prevertebral) Muscles

  14. Platysma • Muscle of Facial Expression • Innervated by the cervical branch of the facial nerve

  15. Innervation and Venous Drainage of the Neck

  16. SVC Syndrome Occlusion of the SVC causes engorgement of the superficial veins that drain the head and neck (usually due to cancer)

  17. A little pressure to the cervical plexus and... VOILA! Practical Application of Anatomy!

  18. Deep Cervical Fascia • Form the boundaries of compartments • Fascial spaces can communicate infection or fluid to other regions of the body • Used as a guide to surgical dissection • Allow the neck structures to glide past one another • Supports the thyroid, lymph nodes and blood vessels

  19. Deep Cervical Fascia

  20. Deep Cervical Fascia

  21. Deep Cervical Fascial Spaces • Retropharyngeal - b/n prevertebral and buccopharyngeal • Pretracheal - b/n infrahyoids and trachea • Lateral pharyngeal - lat to pharynx and communicate with RP and SM spaces • Submandibular - below tongue • deep portion above mylohyoid • superficial portion below mylohyoid

  22. Submandibular Space

  23. Submandibular Abscess in a person with Diabetes

  24. Posterior Triangle of the Neck

  25. Anterior Triangle of the Neck

  26. Anterior Triangle

  27. Submental Triangle

  28. Carotid Triangle

  29. Muscular Triangle

  30. Submandibular Triangle