1 / 21

Posterior Triangle of the Neck

Posterior Triangle of the Neck. Dr. Zeenat Zaidi. The Neck. The region of the body that lies between: The lower border of mandible & The suprasternal notch and the upper border of the clavicle. Skin.

Télécharger la présentation

Posterior Triangle 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. Posterior Triangle of the Neck Dr. ZeenatZaidi

  2. The Neck • The region of the body that lies between: • The lower border of mandible & • The suprasternal notch and the upper border of the clavicle

  3. Skin • The natural lines of cleavage are constant and run almost horizontally around the neck (an incision along a cleavage line heals as a narrow scar)

  4. Superficial Fascia • Thin layer of connective tissue • Encloses platysma • Contains: • cutaneous nerves • superficial veins • superficial lymph nodes

  5. Cutaneous Nerves • Back of the neck: • Greater occipital: branch of the posterior ramus of the C2 (C1 has no cutaneous branch) • Front & side of neck: Anterior rami of C2-C4 through branches of cervical plexus • Lesser occipital C2 • Great auricular C2-3 • Transverse cutaneousC2-3 • SupraclavicularC3-4

  6. Superficial Veins • External Jugular • Anterior Jugular • Formation • Course & relations • Termination • Tributaries

  7. Platysma • Origin: Deep fascia covering pectoralis major and deltoid muscles • Insertion: • Lower margin of the body of mandible • Some fibers blending with the muscle at the angle of the mouth (risoreus) • Below the chin, fibers interdigitate with the fibers of the opposite muscle Nerve Supply:Cervical branch of the facial nerve Action:Depresses mandible, draws down the lower lip and the angle of mouth

  8. Superficial Lymph Nodes

  9. Deep Cervical Fascia

  10. Triangles of the Neck

  11. Sternocleidomastoid • Origin: Upper part of manubrium & medial third of clavicle • Insertion: Mastoid process & lateral part of superior nuchal line • Nerve supply: Spinal part of accessory nerve (motor) & ventral rami of C2-3 (proprioceptive) • Action: • Both muscles acting together extend head at atlanto-occipital joint, and flex cervical part of vertebral column • Contraction of one muscle moves the face to the opposite side

  12. Boundaries • Anterior: Posterior border of sternocleidomastoid • Posterior: Anterior border of trapezius • Inferior: Middle third of clavicle • Roof: skin, superficial fascia, platysma, investing layer of deep fascia • Floor: muscles covered by prevertebral fascia

  13. Muscular Floor of the Posterior Triangle From above downward: • Semispinalis capitis • Splenius capitis • Levator scapulae • Scalenus medius • Scalenus anterior may or may not be present

  14. Subdivision of the Posterior Triangle • Subdivided by the inferior belly of omohyoid muscle, into: • Large occipitaltriangle above • Small supraclaviculartriangle below

  15. Omohyoid Muscle • Two bellies: Superior & Inferior joined by intermediate tendon • Attachement: Superior belly to inferior border of hyoid bone, Inferior belly to superior border of scapula & suprascapular ligament • The Intermediate tendon lies deep to sternocleidomastoid, connected to clavicle & the first rib by a loop of deep fascia • Nerve supply:Ansacervicalis (C1,2,3) Superior belly Intermediate tendon Inferior belly Action: Depresses the hyoid bone

  16. Contents • Arteries: • Subclavian (3rd part) • Superficial cervical & suprascapular(branches of thyrocervical trunk, a branch of 1st part of subclavian artery • Occipital, a branch of external carotid artery

  17. Veins: • External jugular vein • Formation • Termination • Tributaries

  18. Nerves: • Branches of cervical plexus • Spinal part of accessory nerve • Brachial plexus

  19. Clinical Notes • Torticollis (wry neck): • Congenital: due to excessive stretching of sternocleidomastoid muscle during labor. • Spasmodic: usually psychogenic • Injury to spinal part of accessory nerve • Injury to brachial plexus • Pleura & Lung injuries in the root of neck • Injury to nerve to platysma

  20. Thank You & Good Luck

More Related