009- Posterior Cervical Triangle

Front 1

What are the boundaries of the anterior part of the neck?

Back 1

Superior: Body of Mandible, mastoid process of temporal bone

Anterior: Midline

Inferior: Clavicle, Manubrium of Sternum

Posterior: Anterior border of Trapezius m.

Front 2

What muscle divides the anterior neck into posterior and anterior triangles?

Back 2

Sternocleidomastoid muscle

Front 3

What are the boundaries of the posterior triangle?

Back 3

Anterior: SCM

Inferior: Clavicle

Posterior: Trapezius m.

Front 4

What are the two smaller triangles that the posterior belly of the omohyoid muscle makes when it crosses the posterior triangle?

Back 4

Occipital Triangle (superior)

Supraclavicular Triangle (inferior)

Front 5

What nerves can be found in the occipital triangle?

Back 5

Cutaneous nerves of the cervical plexus:

-Lesser Occipital N. (C2-C3)
-Great Auricular N.(C2-C3)
-Transverse Cervical N. (C2-C3)
- Supraclavicular NN. (lateral, intermediate, medial-- from C3-C4)
- Spinal Accessory N. (CN XI)

Front 6

What muscle(s) can be found in the occipital triangle?

Back 6

Splenius cervices m.

Levator scapulae m.

Front 7

What nerves can be found in the supraclavicular triangle?

Back 7

Roots, Trunks, and some branches of the brachial plexus:

-Ventral Rami of C5-6 form upper trunk
-Ventral Rami of C7 forms middle trunk
-Ventral Rami of C8-T1 form lower trunk
-Dorsal Scapular n. branches from C5
-Suprascapular n. branches from upper trunk
-Long thoracic n. branches from rami of C5-7

-Phrenic n. (C3-5)

Front 8

What vessels can be found in the supraclavicular triangle?

Back 8

-Subclavian a.
-Transverse cervical a.
-Dorsal scapular a.
-Suprascapular a.

-Subclavian v.

Front 9

What muscles can be found in the supraclavicular triangle?

Back 9

Middle and posterior scalene muscles

Front 10

Platysma muscle attachments

Back 10

superficial fascia of the deltoid and pectoral regions (subcutaneous tissue of infraclavicular and supraclavicular regions)

mandible; skin of the cheek and lower lip; angle of the mouth; obicularis oris muscle

Front 11

Platysma muscle innervation

Back 11

Facial n.

Front 12

Platysma muscle action

Back 12

Depresses mandible

Tenses skin of inferior face and neck

Front 13

Trapezius muscle innervation

Back 13

CN XI: Spinal Accessory N.

Front 14

Trapezius muscle attachments

Back 14

Medial thirs of superior nuchal line; external occipital protuberance;nuchal ligament;spinous processes of C7-T12 vertebrae

Front 15

SCM muscle attachments

Back 15

mastoid process of temporal bone; lateral half of superior nuchal line

Sternal head: anterior surface of manubrium of sternum
Clavicular head: superior surface of medial third of clavicle

Front 16

SCM innervation

Back 16

motor: CN XI

Pain and propriation: C2-3

Front 17

Subclavius muscle attachments

Back 17

1st rib

inferior surface of middle third of clavicle

Front 18

Subclavius innervation

Back 18

Subclavian nerve (C5-6)

Front 19

Omohyoid muscle attachments

Back 19

superior border of scapula (near suprascapular notch)

inferior border of hyoid

Front 20

Omohyoid innervation

Back 20

C1-C3 by branch of ansa cervicalis

Front 21

Splenius capitis muscle attachments

Back 21

inferior half of nuchal ligament and spinous processes of T1-T6

mastoid process; lateral third of superior nuchal line

Front 22

Splenius capitis innervation

Back 22

Dorsal rami of cervical spinal nerves

Front 23

Levator scapulae innervation

Back 23

C5 (Dorsal Scapular n)

C3-C4

Front 24

Supraclavicular (L,I,M) nerve origin

Back 24

Cervical plexus C3-C4

Front 25

Great Auricular nerve origin

Back 25

Cervical plexus C2-C3

Front 26

Transverse Cervical nerve origin

Back 26

Cervical plexus C2-C3

Front 27

Lesser Occipital nerve origin

Back 27

Cervical plexus C2-C3