The Posterior Triangle of the Neck - Boundaries & Content - Head & Neck Anatomy

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The posterior triangle of the neck is the triangular space on the side of neck behind the sternocleidomastoid muscle. Its apex is directed upwards and backwards towards the mastoid process and base downwards towards the clavicle.
Boundaries:
Anterior is bounded by the posterior border of sternocleoidomastoid muscle.
Posterior is the anterior margin of trapezius muscle.
Inferiorly is bounded by the superior aspect of middle third of the clavicle.
The floor of posterior triangle is muscular and is formed from above downwards by the following muscles:
1. Semispinalis capitis.
2. Splenius capitis.
3. Levator scapulae.
4. Scalenus medius.
5.and on a smal area the Scalenus anterior is also observed. Most of scalenus anterior lies behind the inferior extremity of sternocleidomastoid muscle.
Through the scalene hiatus passes the subclavian artery and trunks of brachial plexus. In front of the scalenus anterior passes the phrenic nerve which is oriented vertically, and the subclavian vein which is oriented horizontally. At this level the subclavian vein recieves the external jugular vein.
#anatomy #head #neck

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[@nooralhudaibrahim7919]

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[@dr.abishek2900]

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[@ajoshi5841]

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[@alevelsdemystified3410]

please make video on sternocleidomastoid muscle. ❤️

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[@medicalthunderzz4143]

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[@gully_sharma]

love the video thanky you very much ,
have u done one on anterior triangle sir?

[@medicalthunderzz4143]

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[@liquidnitro100]

Perfect

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[@Mohsinkhan-cu2ki]

Neuroanatomt plzz

[@06aditiyamahajan39]

Hey ! I think you missed suprascapular artery...

[@chrishemsworth9758]

All things perfect but 1 thing to correct:
There's no nerve named greater auricular nerve.......it is great auricular nerve

[@medicalthunderzz4143]

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[@omnikaquarius4314]

Maybe both are incorrect, since names must follow a strict convention of root words, prefixes and affixes based on the greek and latin languages. Maybe, look it up yourself to be sure.

[@tibahasan3753]

It is the internal jugular with phrenic not external

[@saravucic-sneperger6413]

Isn't this the lateral region of the neck?

[@AnatomyKnowledge]

Yes, it is also called, the lateral region of the neck (lateral cervical region).

[@khalidone9]

its serratus anterior not scalenus anterior maybe

[@AnatomyKnowledge]

Serratus anterior is a muscle on the side of thorax. Originates on the first 8 ribs at the side of the chest and inserts in the anterior lenght of the medial border of scapula. It is not a muscle of the neck.

[@rajkumarmehta7817]

Good to see a person writing with both the hand.it has just reminded me of my friend dr J RAJU
He used to write half of the exam with right hand and rest of the exam with left

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[@raviprasad1268]

@@AnatomyKnowledgevishram singh book says it is serratus anterior muscle

[@dr.mohammadyousri8467]

Amazing