Back and anterior neck muscles (vessels, nerves and muscles of anterior abdominal walls and breast)
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Questions and Answers

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

  • Intrinsic back muscles (correct)
  • Superficial back muscles
  • Extrinsic back muscles
  • Intermediate back muscles

Which nerve supplies the motor fibers of the trapezius muscle?

  • Spinal accessory nerve
  • Cranial nerve XI (correct)
  • Cervical nerves
  • Cranial nerve I

Which muscles in the back connect the axial skeleton with the superior appendicular skeleton and produce limb movements?

  • Intermediate back muscles
  • Superficial back muscles
  • Extrinsic back muscles (correct)
  • Intrinsic back muscles

Which muscles in the back are commonly designated as superficial respiratory muscles?

<p>Intermediate extrinsic back muscles (A)</p> Signup and view all the answers

Which muscles in the back are more likely proprioceptive rather than motor in function?

<p>Intermediate extrinsic back muscles (C)</p> Signup and view all the answers

Which muscles in the back lie deep to the rhomboid muscles?

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

Which muscles in the back lie deep to the latissimus dorsi?

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

Which muscles in the back receive their nerve supply from the anterior rami of cervical nerves and act on the upper limb?

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

Which muscles connect the spinous processes of the vertebrae?

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

Which muscles stabilize and laterally flex the vertebral column?

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

Which muscles assist with respiration and elevate the ribs?

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

Which muscles are deep to the posterior cervical region and superior to the trapezius muscle?

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

What is the primary action of the suboccipital muscles?

<p>Extension of atlanto-occipital joint (C)</p> Signup and view all the answers

Which muscles are innervated by the posterior ramus of C1?

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

Which muscles are part of the superficial group of the anterior neck muscles?

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

Which muscle is responsible for flexion of the lower neck?

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

Which muscle is innervated by the spinal accessory nerve?

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

Which muscles are part of the deep group of the anterior neck muscles?

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

Which layer of the deep back muscles consists of the Erector Spinae group?

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

Which muscle is responsible for extension of the head, cervical spine, and thoracic spine?

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

Which muscle group mainly originates from the transverse processes of the vertebrae?

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

Which muscle is the superficial member of the transversospinalis group?

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

Which layer of the deep back muscles is responsible for stabilization of the vertebral column?

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

Which muscle is best developed in the thoracic region?

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

Which layer of the deep back muscles forms a thin covering over the intrinsic back muscles in the thoracic region?

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

Which muscle group lies in a 'groove' on each side of the vertebral column between the spinous processes and the angles of the ribs?

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

Which muscle group is responsible for contralateral rotation?

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

Which muscle group is enclosed by the thoracolumbar fascia?

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

Which muscle group in the back specifically acts on the vertebral column and maintains posture?

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

Which muscle is responsible for extension of the head, cervical spine, and thoracic spine?

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

Which nerve supplies the trapezius muscle?

<p>Spinal accessory nerve (CN XI) (C)</p> Signup and view all the answers

Which muscle group lies in a 'groove' on each side of the vertebral column between the spinous processes and the angles of the ribs?

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

Which muscle is best developed in the thoracic region?

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

Which layer of the deep back muscles is responsible for stabilization of the vertebral column?

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

Which muscles connect the spinous processes of the vertebrae?

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

Which muscles assist with respiration and elevate the ribs?

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

Which muscle is responsible for extension of the head, cervical spine, and thoracic spine?

<p>Rectus capitis anterior (A)</p> Signup and view all the answers

Which muscle is best developed in the thoracic region?

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

Which muscle moves the rib superiorly during inspiration?

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

Which muscle moves the rib inferiorly during expiration?

<p>Internal intercostal muscle (D)</p> Signup and view all the answers

Which muscle is responsible for increasing the volume of the thoracic cavity during inspiration?

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

Which muscle group anchors the upper limb to the trunk?

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

Which muscle group is enclosed by the thoracolumbar fascia?

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

Which muscle group is responsible for contralateral rotation?

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

Which muscle is responsible for flexion of the lower neck?

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

Which muscle is responsible for extension of the head, cervical spine, and thoracic spine?

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

Which muscle group mainly originates from the transverse processes of the vertebrae?

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

Which muscle group in the back specifically acts on the vertebral column and maintains posture?

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

Which one of the following is the main arterial supply of the breast?

<p>Internal thoracic artery (A)</p> Signup and view all the answers

Which one of the following is the main venous drainage of the breast?

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

Which intercostal nerves innervate the breast?

<p>2nd to 6th intercostal nerves (C)</p> Signup and view all the answers

Which one of the following is the main lymphatic drainage of the breast?

<p>Axillary lymph nodes (B)</p> Signup and view all the answers

Which one of the following is the main arterial supply of the thoracic wall?

<p>Posterior intercostal arteries (B)</p> Signup and view all the answers

Which one of the following is the main venous drainage of the thoracic wall?

<p>Posterior intercostal veins (D)</p> Signup and view all the answers

Which anterior rami of the spinal nerves supply the thoracic wall?

<p>2nd to 12th intercostal nerves (C)</p> Signup and view all the answers

Which one of the following arteries is a direct continuation of the internal thoracic artery and supplies the anterolateral abdominal wall?

<p>Superior epigastric artery (A)</p> Signup and view all the answers

Which one of the following veins is a branch of the external iliac artery and drains the anterolateral abdominal wall?

<p>Inferior epigastric vein (D)</p> Signup and view all the answers

Which one of the following is responsible for the venous drainage of the abdominal wall parallel to the arteries?

<p>Veins that run parallel to the arteries (C)</p> Signup and view all the answers

Which one of the following is the main arterial supply of the breast?

<p>Internal thoracic artery (A)</p> Signup and view all the answers

Which one of the following is the main venous drainage of the thoracic wall?

<p>Intercostal veins (A)</p> Signup and view all the answers

Which one of the following nerves innervates the nipple?

<p>4th intercostal nerve (B)</p> Signup and view all the answers

Which one of the following is responsible for the lymphatic drainage of the breast?

<p>Axillary nodes (A)</p> Signup and view all the answers

Which one of the following arteries directly continues from the internal thoracic artery and supplies the anterolateral abdominal wall?

<p>Superior epigastric artery (D)</p> Signup and view all the answers

Which muscle forms the floor of the thoracic cavity?

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

Which muscle moves the rib inferiorly during expiration?

<p>Internal intercostal muscle (B)</p> Signup and view all the answers

Which muscle moves the rib superiorly during inspiration?

<p>External intercostal muscle (D)</p> Signup and view all the answers

Which muscle depresses the domes of the diaphragm and increases the volume of the thoracic cavity?

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

Which muscle group is responsible for anchoring the upper limb to the trunk?

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

Flashcards

Intrinsic back muscles

Muscles that directly connect to and move the vertebral column, crucial for maintaining posture.

Cranial Nerve XI (Accessory Nerve)

The cranial nerve supplying the trapezius muscle, responsible for shoulder movement and neck rotation.

Extrinsic back muscles

Muscles connecting the axial skeleton (spine) to the upper limbs, allowing for arm and shoulder movements.

Intermediate Extrinsic Back Muscles

A subset of extrinsic back muscles that play a role in respiration by assisting with rib movement.

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Proprioceptive Function

Primarily involved in sensing body position rather than directly producing movement, often found in the intermediate extrinsic back muscles.

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Serratus Posterior Superior

A muscle located deep to the rhomboid muscles, assisting with rib movement and scapular stabilization.

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Serratus Posterior Inferior

A muscle lying deep to the latissimus dorsi, assisting with rib movement during exhalation.

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Anterior Rami of Cervical Nerves

The nerve supply for the trapezius muscle, originating from the cervical spinal cord.

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Interspinales

Muscles connecting the spinous processes of adjacent vertebrae, helping to stabilize and extend the spine.

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Intertransversarii

Muscles connecting the transverse processes of adjacent vertebrae, assisting with lateral bending and stabilization of the spine.

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Levatores Costarum

Muscles that elevate the ribs during inspiration, contributing to breathing.

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Suboccipital Muscles

A group of muscles located deep in the posterior cervical region, just above the trapezius muscle.

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Extension of Atlanto-occipital Joint

The primary action of the suboccipital muscles, allowing the head to tilt backwards.

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Posterior Ramus of C1 Nerve

The nerve supply for the suboccipital muscles, originating from the first cervical spinal nerve.

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Platysma

A superficial muscle group in the anterior neck, responsible for facial expressions and assisting with swallowing.

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Sternocleidomastoid

The muscle primarily responsible for flexing the lower neck, allowing the head to bend forward.

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Spinal Accessory Nerve (CN XI)

The nerve supplying the sternocleidomastoid muscle, also responsible for the trapezius.

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Deep Anterior Neck Muscles

A group of muscles located deep to the anterior neck muscles, playing a role in head and neck movements.

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Erector Spinae Group

The intermediate layer of the deep back muscles, consisting of the Erector Spinae group, responsible for back extension and posture.

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Semispinalis

The muscle that extends the head and spine from the cervical to the thoracic regions, contributing to upright posture.

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Transversospinalis

A muscle group primarily originating from the transverse processes of vertebrae, involved in spine rotation, extension, and lateral flexion.

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Semispinalis

The most superficial member of the transversospinalis group, responsible for extending and rotating the head and spine.

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Deep Layer of Deep Back Muscles

The deepest layer of the deep back muscles, consisting of the rotatores and multifidus muscles, primarily responsible for stabilizing the vertebral column.

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Rotatores

A muscle best developed in the thoracic region, responsible for rotating and stabilizing the vertebral column.

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Superficial Layer of Deep Back Muscles

A thin layer of muscles covering the intrinsic back muscles in the thoracic region, contributing to spine stability.

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Erector Spinae Group

A muscle group located in a groove on each side of the vertebral column, extending from the pelvis to the skull, responsible for back extension and posture.

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Contralateral Rotation

The primary action of the Semispinalis muscle group, causing rotation of the spine to the opposite side.

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Thoracolumbar Fascia

The thick sheet of connective tissue enclosing the Erector Spinae group, providing support and protection.

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Intrinsic Back Muscles

The group of muscles that specifically act on the vertebral column, maintaining posture and enabling movement.

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