Question
A. Greater Auricular nerve
B. Lessser Occipital Nerve
C. Suprascapular Nerve
D. Occipital Artery
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Correct Answer » C Explanation |
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Ans:C. Suprascapular Nerve.
Occipital triangle is shown in the image marked by ‘a’
POSTERIOR TRIANGLE OF NECK
Boundaries
Anterior border – posterior border of sternocleidomastoid muscle
Posterior border– anterior border of trapezius
Base – Superior surface of middle 1/3rd of clavicle
Apex – Superior nuchal line at junction of sternocleidomastoid and trapezius muscles
Roof – Skin & superfical fascia(platysma), investing layer of deep cervical fascia.
Floor- prevertebral layer of deep cervical fascia covering : splenius capitis, levator scapulae, scalenus medius, semispinalis capitis
SUBDIVISION OF POSTERIOR TRIANGLE
- By Inferior belly of omohyoid muscle into Occipital triangle and Supraclavicular triangle
OCCIPITAL TRIANGLE
Floor
- Semispinalis capitis
- Splenius capitis
- Levator scapulae
- S-medium and post.
Contents
NERVES:-
- Spinal part of accessory nerve
- Four cutaneous branches of cervical plexus:-
- Lesser occipital nerve (C2)
- Great auricular nerve (C2, C3)
- Anterior cutaneous nervel of neck (C2, C3)
- Supraclavicular nerve (C3, C4)
- Muscular branches:-
- Two small branches to levator scapulae(C3,C4)
- Two smal branches to the trapezius (C3,C4)
- Nerve to rhomboideus (proprioceptive) (C5)
VESSELS:-
- Transverse cervical artery & vein
- Occipital artery
SUPRACLAVICULAR TRIANGLE(SUBCLAVIAN TRIANGLE)
Boundaries
- Roof :
- Skin
- S/F (platysma)
- investing layer of deep cervical fascia, pierced by three diverging branches of supraclavicular nerve and external jugular vein.
- Floor
- Outer border of 1st rib
- S. medius (near insertion)
- 1st digitation of serratous anterior
Contents
NERVES:-
- Three trunks of brachial plexus
- Nerve to serratus anterior (long thoracic C5,C6,C7)
- Nerve to subclavius (C5, C6)
- Suprascapular nerve (C5, C6)
VESSELS:-
- Third part of subclavian artery & vein
- Suprascapular artery & vein
- Terminal part of external jugular vein