Flashcards in Neck Muscles and Fascia Deck (47):
0
Origin for the Platysma Muscle
Superficial fascia of deltoid and and pectoral regions
1
Insertion of Platysma muscle
Mandible
-->(specifically on the inferior border with some fibers sweeping upward and blending with Risorius)
2
What are the 2 actions of the Platysma muscle?
1. Stretches tight the skin of the neck
2. Depress Mandible
3
What nerve and what specific branch innervates the Platysma muscle?
Facial Nerve (CN VII), Cervical branch
4
Origin of the Sternocleidomastoid muscle
Manubrium and Clavicle (medial third of clavicle)
5
Insertion of the Sternocleidomastoid muscle
Mastoid Process and lateral half of superior nuchal line
6
What are the two actions of the Sternocleidomastoid muscle?
1. Bilaterally - Flexes neck
2. Individually - draws head to shoulder and turns face to opposite side
7
What two nerves innervate the Sternocleidomastoid muscle?
1. Spinal Accessory n.
2. APR of C2 and C3
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Origin of Trapezius muscle
Spines of all thoracic and cervical vertebrae
9
Insertion of Trapezius muscle
Spine and Acromion of scapula
Lateral third of clavicle
10
What are the two actions of the Trapezius on the head?
1. Bilaterally - extends head
2. Individually - tilts chin to opposite side
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What are the two actions of the Trapezius on the limb girdle?
1. Rotates and adducts scapula
2. Elevates scapula and clavicle
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What innervates the Trapezius?
Spinal Accessory n.
APR of C3 and C4
13
Name all eight muscles of the posterior triangle of the neck
Platysma, Sternocleidomastoid, Trapezius, Splenius Capitis, Levator Scapulae, Posterior Scalene, Middle Scalene, Anterior Scalene
14
Origin of the Splenius Capitis
Ligamentum Nuchae (lower part) and Cervical Spines (lower)
15
Insertion of Splenius Capitis
Mastoid Process and Nuchal Line (superior)
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Two actions of the Splenius Capitis
1. Bilateral - Extends head
2. Individually - Flexes head laterally, rotates head to ipsilateral side
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What innervates the Splenius Capitis muscle?
Segmented PPR of cervical spinal nerves
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What is the origin of the Levator Scapulae muscle
Transverse processes of 4 upper cervical vertebrae
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The Levator Scapulae inserts in only place. What is the insertion?
Scapula (superior portion of the lateral border)
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What is the action of the Levator Scapulae
Elevates and rotates scapula
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What nerve innervates the Levator Scapulae?
Dorsal Scapular Nerve
22
Origin of Posterior Scalene muscle
Transverse processes on portion of cervical vertebrae (C5 and C6)
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Insertion of the Posterior Scalene?
Second rib (superior aspect)
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What are the 2 actions of the Posterior Scalene muscle?
1. Bilaterally - Flexes neck
2. Individually - Flexes neck laterally
25
Innervation of Posterior Scalene?
APR of C5 to C8
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Origin of the Middle Scalene muscle
Transverse Processes of Cervical portion of vertebrae (C2 to C7)
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Insertion of Middle Scalene
First Rib (Superior aspect)
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What are the two actions of the Middle Scalene?
1. Bilaterally - Flexes Neck
2. Individually - Flexes neck laterally
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What is the innervation of the Middle Scalene muscle
APR of C3 and C4
30
Origin of Anterior Scalene
Transverse Processes of Cervical portion of vertebrae (C3 to C6)
31
Insertion of Anterior Scalene
Scalene tubercle of First rib
32
What are the two actions of the Anterior Scalene?
1. Bilaterally - Flexes Neck
2. Individually - Flexes neck laterally
33
Other than their respective main actions, the scalene muscles and sternocleidomastoid muscles aid in what other action of the body?
Respiration. They aid in inspiration by elevating the ribs and sternum
34
Innervation of the Anterior Scalene muscle
APR of C5 to C8
35
What are the two subdivisions of the Posterior Triangle?
1. Occipital
2. Supraclavicular
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What are the three things that make up the Supraclavicular triangle?
Omohyoid, Sternocleidomastoid, Clavicle
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Three aspects of the Occipital Triangle?
Sternocleidomastoid, Trapezius, Omohyoid
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Inferior border of the Posterior Triangle?
Clavicle
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Anterior border of the Posterior Triangle?
Sternocleidomastoid muscle
40
What muscle is housed in the Superficial Fascia?
Platysma
41
The four fascias of the Deep Fascia of the neck
1. Investing Fascia
2. Pretrachial Fascia
3. Carotid Sheath
4. Prevertebral Fascia
42
What three things are found within the Carotid Sheath?
1. Common Carotid a.
2. Vagus n.
3. Internal Jugular v.
43
Two muscles found within the Investing Fascia of the neck
Sternocleidomastoid m. & Trapezius m.
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Three things found in the Pretrachial Fascia
1. Thyroid Gland
2. Trachea
3. Esophagus
45
What is housed in the Pre-vertebral Fascia?
Vertebrae and deep back muscles
46