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Ns6 Posterior Triangle Of Neck
 

Ns6 Posterior Triangle Of Neck

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NS6

NS6
Lecture 6 of 63 in the Neuroscience Module

"Posterior Triangle of the Neck" [Anatomy]

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Ns6 Posterior Triangle Of Neck Ns6 Posterior Triangle Of Neck Presentation Transcript

  • Posterior Triangle of Neck Dr. Skantha Kandiah MBA, MSc (NUI), MB BCh BAO (NUI), LRCP & SI Senior Lecturer in Anatomy and Lecturer in Healthcare Management RCSI
  • Posterior Triangle
  • Posterior Triangle
    • Base: Middle 1/3 of the clavicle
    • Roof: Investing layer of deep cervical fascia
    • Floor: prevertebral fascia lying on splenius, levator scapulae and scalenus medius
  • Contents
    • Upper trunk of Brachial Plexus
    • Apex of the lung extends to 2cm above the middle 1/3 of the clavicle
    • Lymph nodes
    • Subclavian artery – at root of neck
    • Subclavian vein – at root of neck
    • External Jugular Vein
    • Spinal part of XI
  • External Jugular Vein
  • XI
    • Accessory nerve
    • Spinal and Cranial parts
    • Spinal part accessory nerve – superficial structure in posterior triangle
    • 1/3 down the posterior border of SCM to 2/3 down the anterior border of trapezius
  • XI
  • XI
    • SCM
    • Trapezius
    • How do you test above muscles?
    • Spinal and cranial parts
  • Other Nerves…..
  • Cervical Plexus: Muscular Branches
    • Anterior primary rami of the upper cervical nerves form the cervical plexus
    • ansa cervicalis: C1,2,3 and XII (descendens hypoglossi)
    • Ansa cervicalis supplies the strap muscles
    • Phrenic nerve: C3,4,5
  • Cervical Plexus: Cutaneous Branches
    • Lesser occipital C2: upper triangle, behind ear
    • Great Auricular C2,3: skin over parotid
    • Transverse Cervical C2,3: chin to sternum
    • Supraclavicular C3,4
  • Stab Wound to Posterior Triangle
    • Upper trunk brachial plexus injury
    • What is it called?
    • Apex of the lung is here, so what might happen?
    • Bleeding from?
  • Sample Question
    • Describe the boundaries and contents of the posterior triangle of the neck. Explain the consequences of a stab injury to the posterior triangle. Give surface markings of any important structures you name.