Posterior Triangle of the Neck

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Posterior Triangle of the Neck

• R. Shane Tubbs, MS, PA-C, PhD

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Posterior Triangle Boundaries
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Deep Cervical Fascia

• 1. superficial (investing)
• 2. prevertebral
• 3. visceral (pretracheal and buccopharyngeal)
• 4. carotid sheath

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Roof Platysma plus investing fascia
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Platysma Functions/Innervation
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Floor
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Scalene origin anterior C3-C6 posterior C2-C7
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Scalene Triangle

• Anterior, middle scalene,
• and 1st rib.

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Cervical plexus (C1-C4 )

• Cutaneous
• Ansa cervicalis (C1-C3)
• Phrenic
• Contributions to XI
• Muscular

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Nerve point 3 cm superior to clavicle
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Most frequently iatrogenically injured nerve
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Subclavian artery 2-4 cm into neck
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Subclavian artery parts

• 1st vertebral, thyrocervical, IMA, (L
  costocervical)
• 2nd highest, R costocervical trunk
• 3rd longest dorsal scapular, 20 suprascapular

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