Muscles of the Back and Neck
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Questions and Answers

Which group of muscles in the back specifically act on the vertebral column and help maintain posture?

  • Intrinsic back muscles (correct)
  • Superficial extrinsic back muscles
  • Extrinsic back muscles
  • Intermediate extrinsic back muscles
  • Which of the following muscles is NOT considered a superficial extrinsic back muscle?

  • Trapezius
  • Levator scapulae
  • Latissimus dorsi
  • Rhomboids (correct)
  • Which nerve supplies the trapezius muscle?

  • Cervical nerves
  • Cranial nerve
  • Intercostal nerves
  • Spinal accessory nerve (correct)
  • Which muscles are commonly designated as superficial respiratory muscles?

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

    Which layer of the intrinsic back muscles lies deep to the rhomboid muscles?

    <p>Deep layer</p> Signup and view all the answers

    Which layer of the intrinsic back muscles lies deep to the latissimus dorsi?

    <p>Deep layer</p> Signup and view all the answers

    Which nerves innervate the serratus muscles running within the ribcage?

    <p>Intercostal nerves</p> Signup and view all the answers

    Which nerves innervate the intrinsic back muscles?

    <p>Posterior rami of spinal nerves</p> Signup and view all the answers

    Which layer of the intrinsic back muscles are grouped according to their relationship to the surface?

    <p>Superficial layer</p> Signup and view all the answers

    Which muscles in the back produce and control limb movements?

    <p>Superficial extrinsic back muscles</p> Signup and view all the answers

    Which muscle lies deep to the trapezius, sternocleidomastoid, splenius, and semispinalis muscles?

    <p>Rectus capitis posterior major</p> Signup and view all the answers

    Which muscle is innervated by the posterior ramus of C1?

    <p>Rectus capitis posterior major</p> Signup and view all the answers

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

    <p>Rectus capitis posterior major</p> Signup and view all the answers

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

    <p>Rectus capitis posterior major</p> Signup and view all the answers

    Which muscle is innervated by the ventral rami of the cervical spinal nerves?

    <p>Longus capitis</p> Signup and view all the answers

    Which muscle is responsible for lateral flexion of the head and neck during unilateral contraction?

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

    Which muscle is responsible for contralateral rotation of the head and neck during unilateral contraction?

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

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

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

    Which muscle is responsible for flexion of the lower neck during bilateral contraction?

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

    Which muscle is responsible for elevation of the sternum and clavicle during forced inhalation?

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

    Which layer of deep back muscles consists of the splenius capitis and splenius cervicis muscles?

    <p>Superficial layer</p> Signup and view all the answers

    Which layer of deep back muscles consists of the erector spinae muscles?

    <p>Intermediate layer</p> Signup and view all the answers

    Which layer of deep back muscles consists of the semispinalis, multifidus, and rotatores muscles?

    <p>Deep layer</p> Signup and view all the answers

    Which layer of deep back muscles is the most superficial?

    <p>Superficial layer</p> Signup and view all the answers

    Which layer of deep back muscles is the deepest?

    <p>Deep layer</p> Signup and view all the answers

    Which muscles are the chief extensors of the vertebral column?

    <p>Erector spinae</p> Signup and view all the answers

    Which muscles aid in extension, lateral flexion, and rotation of the neck?

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

    Which muscles are responsible for stabilization of the vertebral column?

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

    Which muscles are best developed in the thoracic region and assist in small rotatory movements in the thoracic spine?

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

    Which muscles connect spinous processes and transverse processes in the back?

    <p>Interspinales and intertransversarii</p> Signup and view all the answers

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