Anatomy of the Spinal Cord and Spinal Nerves
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Questions and Answers

What is the function of the dorsal root ganglion?

  • It contains the nerve cell bodies of sensory neurons coming from the body (correct)
  • It is a web-like arrangement of nerves near the spinal cord
  • It is a swelling of the ventral root within the intervertebral foramen
  • It carries motor information from the anterior gray horn

    • How many spinal nerves are in the thoracic region?

  • 12 (correct)
  • 8
  • 31
  • 5

    • What is the mnemonic for the branches of the posterior cord of the brachial plexus?

  • Hypoglossal nerve, Ansa cervicalis, Phrenic nerve
  • ULTRA - Upper subscapular, Lower subscapular, Thoracodorsal, Radial, Axillary (correct)
  • Roman Togas Don't Cover Balls
  • STAR - Subscapular (upper and lower), Thoracodorsal, Axillary, Radial

    • Which plexus is formed by the spinal nerves C5 through T1?

    <p>Brachial plexus</p> Signup and view all the answers

    What is the function of the ventral root?

    <p>It carries motor information from the anterior gray horn and innervates muscles</p> Signup and view all the answers

    Which spinal nerves form the cervical plexus?

    <p>First 5 cervical nerves</p> Signup and view all the answers

    What is the function of the brainstem?

    <p>Permitting voluntary movements smoothly</p> Signup and view all the answers

    Which structure connects the narrow spinal cord with the forebrain?

    <p>Medulla oblongata</p> Signup and view all the answers

    Which nerve emerges between the pyramid and the olive, crosses the posterior cranial fossa, and leaves the skull through a specific canal?

    <p>Hypoglossal nerve</p> Signup and view all the answers

    Which nerve is involved in the sense of smell?

    <p>Olfactory nerve</p> Signup and view all the answers

    Which nerve is known as the 'motor nerve'?

    <p>Hypoglossal nerve</p> Signup and view all the answers

    Which structure is not part of the meninges covering of the brain?

    <p>Gray matter</p> Signup and view all the answers

    What is the primary function of dermatomes?

    <p>To assess spinal cord damage by mapping skin sensation</p> Signup and view all the answers

    Which muscle is innervated by the common fibular nerve?

    <p>Biceps femoris (short head)</p> Signup and view all the answers

    Which of the following is NOT a function of the parasympathetic division of the autonomic nervous system?

    <p>Pupil dilation</p> Signup and view all the answers

    Which division of the autonomic nervous system controls the resting state of the body?

    <p>Parasympathetic division</p> Signup and view all the answers

    Which part of the central nervous system do the sacral segments of the parasympathetic division originate from?

    <p>Sacral spinal cord</p> Signup and view all the answers

    Which of the following structures is NOT innervated by the cranial segments of the parasympathetic division?

    <p>Skeletal muscles</p> Signup and view all the answers

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