Muscles_Root_of_The_Neck_e-learning.ppt

7/29/2019 Muscles_Root_of_The_Neck_e-learning.ppt

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Muscles & Root of The Neck


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Muscles of The Cervical Region

3 groups

1. Superficial muscles:

platysma, SCM, Trapezius

2. Hyoid related muscles

supra & infra hyoid

3. Cervical vertebral musclesant., lat. & post.


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Platysma

muscle of facial expression

Sup. Attachment:

inf. border of mandible & ??

Inf. attachment:delto-pectoral deep fascia

Innervation:

cervical branch of VII

Actions:

draws mouth corners inf.

draws skin of the neck sup.


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SternocleidomastoidOrigin:

Manubriun (sternal head)med.1/3 of clavicle (c. head)

Insertion:

Mastoid process of temporal

& ???Innervation:

spinal part of XI

Action:

single: turns head superolaterallyto opposite side

Both: flex the neck

Key m. because it divides anterolat. aspect of Neck


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Trapezius Muscle

Origin:med. 1/3 of sup. Nuchal line

EOP

nuchal lig.

spinous processes (C7-T12)

Insertion:

Lat. 1/3 of clavicle

acromion

spine of scapula

Innervation: ??

Actions: 3 actions?


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Hyoid Related Muscles

Suprahyoid Muscles

Geniohyoid (C1 via XII)

Mylohyoid (n. to myl.)

floor of the mouth

Stylohyoid (cervical VII)

diverge around ?

Digastric m. (2 bellies)

ant. (n. to mylo.)

post. (cervical VII)

origin?, insertion?, innervation? & action? For all of these muscle


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Muscular Attachments to The Mandible


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Infrahyoid Muscles

Sternohyoid (ansa)

Sternothyroid (ansa)

Thyrohyoid (C1 via XII)

Omohyoid (ansa)

2 bellies (sup. & inf.)

* All are innervated by ansacervicalis except?

origin?, insertion?, innervation? & action? For all of these muscle


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Ansa Cervicalis (C1, C2, C3)


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Cervical Vertebral Muscles


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Cervical Vertebral Muscles

3 groups around V.C.

(Ant., Lat., Post.)

Anterior:

Longus Capitis

Longus Cervicis

Vertical

Sup. ObliqueInf. oblique


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Lateral Group (Scalene Muscles)

Sc. Ant.Sc. Medius

Sc. Posterior

Trans. Processes of Cerv. V.

1st & 2nd ribs

(which m.?)

Innerv.: cervical spinal n.

Action:

elevation of ribs,

bending cervical spine (neck)


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Scalenus Ant. & Scalene Hiatus

Trans. Processes of C3-C6

Scalene tubercle (1st rib)

Relations to Sc. Ant.:

Ant.: subclavian V.& ??

Post.: subclavian a.

Brachial Plexus (roots)

Scalene Hiatus:

Boundaries?

Contents?


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Posterior Group of Cervical vertebralMuscles

Levator Scapulae (posterolat. Corner)

Splenius capitis & cervicis

Semispinalis capitis & cervicis

Rectus capitis post. major & minor

Sup. & inferior obliques of the head


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Splenius & Semispinalis Muscles


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Rectus & Oblique Muscles


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Suboccipital Triangle

Boundaries? Contents?


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Root of The Neck

The area of the neck that lies immediately above the

superior thoracic opening

What are the boundaries for Sup. thoracic opening ?


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Contents of The Root of The Neck

1. lower portions of scalene muscles (3 muscles)

2. subclavian artery & vein

3. thoracic duct:

lymph vessel extends from thorax to drain into leftbrachiocephalic vein

4. roots & trunks of brachial plexus

5. Phrenic nerve (pass anterior to ??)

from roots of C3, C4, C5 spinal nerves

Muscles_Root_of_The_Neck_e-learning.ppt

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