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Gross Anatomy 4 > Posterior Triangle of the Neck > Flashcards

Posterior Triangle of the Neck Flashcards

1
Q

What are the movements of SCM?

A

Extension
Flexion
Lateral rotation
Lateral flexion

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2
Q

What are the attachments of middle scalene?

A

Transverse processes of C2-7

To rib 1 behind the subclavian artery groove

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3
Q

What structures cross the SCM?

A

External jugular vein

Great auricular nerve

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4
Q

What is this muscle?

A

Levator Scapulae

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5
Q

What are the roles of the different parts of the trapezius?

A

Ascending part - depresses the scapula
Transverse part - retracts the scapula
Descending part - elevates the scapula and rotates the glenoid cavity

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6
Q

What veins form the external jugular vein?

A

The posterior auricular vein and posterior division of the retromandibular vein

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7
Q

What is this muscle?

A

Trapezius

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8
Q

What muscle is shown?

A

Sternocleidomastoid

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9
Q

What are the movements of levator scapulae?

A

Can elevate scapula

If shoulder is in a fixed position, it can laterally flex the neck

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10
Q

What are the attachments of the anterior scalene?

A

Transverse process of C3-C6

To scalene tubercle of rib 1

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11
Q

What is the innervation of levator scapulae?

A

C3, C4 and C5 via the dorsal scapular nerve

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12
Q

What is the function of the scalene muscles?

A

To flex neck (bilaterally)
Tilt head to the same side (unilateral)
Elevate the upper ribs

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13
Q

What are the borders of the posterior triangle of the neck?

A

Anterior Border = posterior border of SCM
Posterior Border = anterior border of the trapezius
Base = clavicle

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14
Q

What muscles make up the floor of the posterior triangle of the neck?

A

Splenius capitus
Levator scapulae
Scalene muscles
Omohyoid passes through

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15
Q

What nerve crosses anterior scalene?

A

Phrenic nerve

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16
Q

What are the attachments of the posterior scalene?

A

Transverse processes of C4-6

To rib 2

17
Q

What are the attachments of levator scapulae?

A

Transverse process of C1-C4

To medial scapular border between superior angle and medial end of the scapular spine

18
Q

What is found between the the anterior and middle scalenes?

A

Roots of the brachial plexus

19
Q

What is the innervation of SCM?

A

Motor - spinal accessory nerve (CN XI)

Proprioception - C2, C3

20
Q

What are the attachments of SCM?

A

Attaches to mastoid process of the temporal bone and crosses the neck to attach to the clavicle and the sternum

21
Q

What is the innervation of trapezius?

A

Spinal accessory nerve (CN XI)

Proprioception is cervical plexus (C3, C4)

22
Q

What is contained within the posterior triangle of the neck?

A

External jugular vein
Roots of the brachial plexus
Accessory nerve
Cervical and supra-clavicular lymph nodes

Gross Anatomy 4 (14 decks)

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