MSK3 - Back and Anterior Neck Muscles
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Questions and Answers

Which muscle is responsible for the extension of the neck?

  • Semispinalis capitis
  • Splenius Capitis and Cervicis (correct)
  • Rotatores
  • Multifidus

Which muscle is the chief extensor of the vertebral column?

  • Longissimus
  • Spinalis
  • Erector Spinae (correct)
  • Iliocostalis

Which muscle is responsible for the extension of the atlanto-occipital joint?

  • Rectus capitis anterior
  • Longus capitis
  • Rectus capitis posterior major and minor (correct)
  • Obliquus muscles

Which muscle is responsible for the rotation of the atlanto-axial joint?

<p>Obliquus muscles (A)</p> Signup and view all the answers

Which muscle is responsible for the extension of the head and upper neck?

<p>Sternocleidomastoid (C)</p> Signup and view all the answers

Which muscle is responsible for the flexion of the cervical spine (chin to chest)?

<p>Longus coli and capitis (A)</p> Signup and view all the answers

Which muscle is deep to the rhomboids and connects the vertebral column to the ribs?

<p>Serratus posterior superior</p> Signup and view all the answers

Which muscle is deep to the latissimus dorsi and connects the vertebral column to the ribs?

<p>Serratus posterior inferior</p> Signup and view all the answers

Which muscle group is responsible for extension, rotation, and stabilization of the vertebral column?

<p>Transversospinalis Group</p> Signup and view all the answers

The intertransversarii muscles connect adjacent TVP's and provide ______

<p>stabilization</p> Signup and view all the answers

The levatores costarum muscles connect the ribs to the TVP's and assist in ______

<p>respiration</p> Signup and view all the answers

The thoracolumbar fascia is a deep fascia that encloses the intrinsic muscles of the spine and extends from the pelvis to the ______

<p>cranium</p> Signup and view all the answers

The suboccipital region contains the rectus capitis posterior muscles, which are responsible for the ______ of the atlanto-occipital joint

<p>extension</p> Signup and view all the answers

Which muscle group is responsible for producing and controlling limb movements in the back region?

<p>Extrinsic back muscles (B)</p> Signup and view all the answers

Which muscle receives its motor fibers from the spinal accessory nerve (CN XI)?

<p>Trapezius (B)</p> Signup and view all the answers

Which muscle lies deep to the rhomboid muscles and is commonly designated as a superficial respiratory muscle?

<p>Serratus posterior superior (D)</p> Signup and view all the answers

Which muscle group is responsible for extension, rotation, and stabilization of the vertebral column?

<p>Deep Layer: Transversospinalis Group (B)</p> Signup and view all the answers

Which muscle is responsible for the extension of the neck?

<p>Splenius Cervicis and Capitis (A)</p> Signup and view all the answers

Which muscle is responsible for the flexion of the cervical spine (chin to chest)?

<p>Longus coli and capitis (D)</p> Signup and view all the answers

Which muscle is the chief extensor of the vertebral column?

<p>Erector Spinae (C)</p> Signup and view all the answers

Which muscle group is responsible for stabilization and proprioception of the vertebral column?

<p>Interspinales (C)</p> Signup and view all the answers

Which muscle group is responsible for stabilization and lateral flexion of the vertebral column?

<p>Intertransversarii (C)</p> Signup and view all the answers

Which muscle group assists with respiration by elevating the ribs and contributes to lateral flexion of the vertebral column?

<p>Levatores costarum (B)</p> Signup and view all the answers

Which muscle group is responsible for extension of the atlanto-occipital joint and rotation of the atlanto-axial joint?

<p>Suboccipital muscles (B)</p> Signup and view all the answers

What are the four main superficial extrinsic back muscles?

<p>a. Trapezius b. Latissimus dorsi c. Levator scapulae d. Rhomboids</p> Signup and view all the answers

Intermediate extrinsic back muscles include _____________ and ____________

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Roles of the superficial extrinsic back muscles include producing and controlling ________________ and connecting the vertebral column with upper limbs

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Intermediate extrinsic back muscles are innervated by:

<p>intercostal nerves (C)</p> Signup and view all the answers

Splenius capitus extends from the __________________ to the mastoid process and occipital bone

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Splenius cervicis extends from ___________ to _____________

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Splenius capitus and cervicis function to:

<p>all of the above (D)</p> Signup and view all the answers

What are the three muscles in the erector spinae group?

<p>iliocostalis, longissimus, spinalis</p> Signup and view all the answers

Iliocostalis attaches from the ________ to cervical TVPs

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Longissimus extends from TVPs in the thoracic and cervical region to the ______________

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Spinalis extends between ____________ in thoracic and cervical regions

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Actions of the erector spinae include (3):

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Semispinalis extends from ______ to _____

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What are the main actions of semispinalis?

<p>extension of head, cervical and thoracic spine contralateral rotation</p> Signup and view all the answers

Multifidus and rotatores attach from _______ to ________

<p>TVPs to SPs</p> Signup and view all the answers

The ____________ of the segmental back muscles connects adjacent SPs

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The ___________ of the segmental back muscles connect adjacent TVPs

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The _____________ of the segmental muscles of the back connect ribs to TVPs

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Respiration in elevation of ribs (rib to TVP) and lateral flexion of column (TVP closer to ribs), along with proprioception, are actions of which muscle?

<p>levatores costarum (C)</p> Signup and view all the answers

Stabilization in holding TVPs stable, lateral flexion and proprioception are actions of which muscle?

<p>intertransversarii (D)</p> Signup and view all the answers

Extension (holding SPs up), small rotation and proprioception are actions of which muscles?

<p>interspinalis (B)</p> Signup and view all the answers

Superficial intrinsic back muscles in the spinotransverse group include which muscles?

<p>splenius capitus and splenius cervicis</p> Signup and view all the answers

What muscles are included in the intermediate intrinsic (sacropsinalis) back muscles?

<p>erector spinae - iliocostalis, longissimus, spinalis</p> Signup and view all the answers

The deep layer (transversospinalis) intrinsic back muscles includes:

<p>semispinalis, multifidus, rotatores</p> Signup and view all the answers

The segmental muscles (minor deep muscles) of the back include:

<p>intertransversarii, interspinales and levatores costarum</p> Signup and view all the answers

What are the two muscles in the suboccipital region?

<p>rectus capitis posterior (major and minor) and obliquus (inferior and superior)</p> Signup and view all the answers

The muscles of the suboccipital region function to ____________________________ and ___________________

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Superficial anterior neck muscles include ___________ and _____________

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The platysma attaches from the _______________ to the __________ and skin of the lower face

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The platysma is innervated by:

<p>CN VII - facial nerve (A)</p> Signup and view all the answers

What are the main actions of the platysma?

<p>depress and draws lower lip inferiorly depress the mandible at TMJ</p> Signup and view all the answers

The sternocleidomastoid extends from the _______________ and the manubrium of the sternum to the _______________ and lateral 1/2 of superior nuchal line of occipital bone

<p>medial 1/3 clavicle; mastoid process of temporal bone</p> Signup and view all the answers

The sternocleidomastoid muscle is innervated by:

<p>CN XI - spinal accessory nerve (B)</p> Signup and view all the answers

Unilateral contraction of the sternocleidomastoid process results in _____________ and ______________ of the head and neck

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Bilateral contraction of the sternocleidomastoid muscle results in _____________ of the head/upper neck and ___________ of the lower neck

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Longus capitus extends from the _____________ to anterior tubercles of __________-

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Longus coli extends from the ___________, C1-C3 bodies and C3-C6 bodies to attach to bodies of C5-T3 and _______ of C3-C5

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The two main actions of the longus capitis and longus coli muscles are _____________ of the cervical spine and ___________________(a little)

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Rectus capitis anterior extends from the _________ to the anterior surface of lateral masses of the atlas

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Rectus capitis lateralis extends from the ___________ of the occipital bone to the _________ of the atlas

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The middle scalene and posterior scalene muscles extend from the ______ of C5-C7 to the ______ (middle) and ________ (posterior) ribs

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Anterior scalene extends from the ______ of C3-C6 to the ________

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The scalene muscles are responsible for flexing the neck _______

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The anterior and middle scalene muscles help to ________________ during forced inspiration

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The posterior scalene muscle helps to ________ during forced inspiration

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