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Posterior triangle divisions
- Occipital triangle
- Supraclavicular (omoclavicular) triangle
- Submandibular triangle
Divided by the inferior belly of the omohyoid
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Posterior triangle boundaries
(Anterior, Posterior, Inferior, Apex, Roof and Floor)
- Anterior: Posterior border of SCM
- Posterior: Anterior border of trapezius
- Inferior: middle 1/3 of clavicle
- Apex: Where SCM and trapezius meet on superior nuchal line
- Roof: Investing layer of deep cervical fascia
- Floor: Muscles covered by prevertebral layer of deep cervical fascia
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Occipital triangle contents
- Part of EJV
- Posterior branches of cervical plexus
- Accessory nerve
- Trunks of brachial plexus
- Transverse cervical artery
- Cervical lymph nodes
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Contents of Omoclavicular triangle
- 3rd part of subclavian artery
- part of subclavian vein
- suprascapular artery
- supraclavicular lymph nodes
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What are the divisions of the anterior triangle?
- Submandibular (digastric) triangle
- Submental triangle
- Carotid triangle
- Muscular (omotracheal) triangle
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What are the boundaries of the anterior triangle?
(Anterior, Posterior, Superior, Apex, Roof and Floor)
- Anterior: median line of neck
- Posterior: anterior border of SCM
- Superior: Inferior border of mandible
- Apex: Jugular notch of manubrium
- Roof: Subcutaneous tissue containing platysma
- Floor: Pharynx, larynx and thyroid
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Submandibular triangle contents
- Submandibular gland
- Submandibular lymph nodes
- Hypoglossal nerve
- Mylohyoid nerve
- Parts of facial artery and vein
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Submental triangle contents
- Submental lymph nodes
- Small veins that unite to form AJV
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Carotid triangle contents
- Carotid sheath
- External carotid artery
- Hypoglossal nerve
- Superior root of ansa cervicalis
- Accessory nerve
- Thyroid
- Larynx
- Pharynx
- Deep cervical lymph nodes
- Branches of cervical plexus
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Muscular triangle contents
- Sternothyroid muscle
- Sternohyoid muscle
- Thryroid
- Parathyroids
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