Anatomy of the Spinal Cord - Trinity College Dublin
35 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Where do many afferent nerve fibers entering the spinal cord terminate?

  • Ventral horn
  • Lateral horn
  • Dorsal horn (correct)
  • Intermediate lateral horn
  • Which part of the spinal cord contains cell bodies of motion neurons innervating skeletal muscle?

  • Ventral horn (correct)
  • Intermediate lateral horn
  • Dorsal horn
  • Lateral horn
  • Which area within the spinal cord is well developed at cervical and lumbar levels in relation to limb innervation?

  • Intermediate lateral horn
  • Dorsal horn
  • Ventral horn (correct)
  • Lateral horn
  • Which part of the spinal cord is the main site of termination for primary afferent fibers?

    <p>Dorsal horn</p> Signup and view all the answers

    Which horn of the spinal cord contains alpha and gamma motor neurons responsible for skeletal muscle innervation?

    <p>Ventral horn</p> Signup and view all the answers

    Which neural pathways transmit sensory information from peripheral nerves to the cerebral cortex?

    <p>Ascending tracts</p> Signup and view all the answers

    What structure is closely applied to the surface of the spinal cord and nerve roots?

    <p>Denticulate ligament</p> Signup and view all the answers

    Which spinal nerve exits below the 7th cervical vertebra?

    <p>C8</p> Signup and view all the answers

    What is the name for the leash-like arrangement of the lumbar and sacral roots below the termination of the spinal cord?

    <p>Cauda equina</p> Signup and view all the answers

    Which meningeal layer invests the spinal cord like a loose-fitting bag?

    <p>Arachnoid mater</p> Signup and view all the answers

    In which region do the spinal cord segments lie adjacent to the corresponding vertebral bodies?

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

    What projects out laterally from the denticulate ligament to tether the spinal cord to the arachnoid and dura?

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

    What type of information does the dorsal column-medial lemniscal pathway transmit?

    <p>Discriminative touch</p> Signup and view all the answers

    Which pathway conveys nociception and non-discriminative touch information?

    <p>Spinothalamic pathway</p> Signup and view all the answers

    What is proprioception related to?

    <p>Location and movement of joints</p> Signup and view all the answers

    Which tracts are responsible for the conscious, voluntary control of body and face muscles?

    <p>Pyramidal tracts</p> Signup and view all the answers

    What type of information does the corticospinal tract carry?

    <p>Information from the cerebral cortex to the spinal cord</p> Signup and view all the answers

    Which descending motor pathway passes through the pyramids of the medulla?

    <p>Corticospinal tract</p> Signup and view all the answers

    What type of information does the spinothalamic pathway convey?

    <p>Nociception and non-discriminative touch</p> Signup and view all the answers

    Which ascending tracts are responsible for proprioception?

    <p>Spinocerebellar tracts</p> Signup and view all the answers

    In the ascending tracts, which pathway is known for discriminative touch?

    <p>Dorsal column-medial lemniscal pathway</p> Signup and view all the answers

    What type of sensory information do the ascending tracts transmit to the cerebral cortex?

    <p>Sensory information</p> Signup and view all the answers

    Which ascending tract conveys information related to how hard someone is squeezing you?

    <p>Dorsal column-medial lemniscal pathway</p> Signup and view all the answers

    What type of sensory information do the spinocerebellar tracts transmit?

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

    Which ascending tract conveys unconscious sensory information related to joint location and muscle force?

    <p>Spinocerebellar tracts</p> Signup and view all the answers

    Which ascending tract is responsible for conveying nociception and non-discriminative touch information to the cerebral cortex?

    <p>Spinothalamic pathway</p> Signup and view all the answers

    Which ascending tract is known as the discriminative touch pathway?

    <p>Dorsal column-medial lemniscal pathway</p> Signup and view all the answers

    Where do the ascending tracts transmit sensory information to?

    <p>Cerebral cortex</p> Signup and view all the answers

    What is the main function of the pyramidal tracts in the major descending motor pathway?

    <p>Controlling voluntary movements of body and face muscles</p> Signup and view all the answers

    Where does the majority (~85%) of the fibers from the corticospinal tract cross over in the brain stem?

    <p>Decussation of the pyramids</p> Signup and view all the answers

    Which part of the body is controlled by the corticobulbar system in the descending motor pathway?

    <p>Face, head, and neck muscles</p> Signup and view all the answers

    Where do the remaining 15% of fibers from the corticospinal tract cross over?

    <p>Spinal cord level of termination</p> Signup and view all the answers

    Which type of neurons make up the corticobulbar tract?

    <p>Upper motor neurons</p> Signup and view all the answers

    What type of movements are controlled by the pyramidal tracts in the major descending motor pathway?

    <p>Voluntary movements</p> Signup and view all the answers

    Which part of the central nervous system do the pyramidal tracts mainly influence?

    <p>Spinal cord</p> Signup and view all the answers

    More Like This

    Spinal Cord Anatomy Quiz
    17 questions
    Anatomy of the Spinal Cord and Meninges
    40 questions
    Use Quizgecko on...
    Browser
    Browser