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Spinal cord - Quiz
Contributed by: Norman
  • 1. Which spinal cord enlargement corresponds to the brachial plexus nerves?
A) Sacral enlargement
B) Thoracic enlargement
C) Cervical enlargement
D) Lumbar enlargement
  • 2. The cervical enlargement includes spinal cord segments from approximately:
A) L2 to S3
B) T9 to T12
C) C4 to T1
D) C1 to C3
  • 3. Which segments comprise the lumbar enlargement?
A) T1 to L1
B) L2 to S3
C) S4 to Co1
D) C4 to T1
  • 4. At which vertebral levels is the lumbar enlargement found?
A) T9 to T12
B) L1 to L5
C) C7 to T2
D) C4 to T1
  • 5. How many longitudinal arteries run along the length of the spinal cord?
A) One
B) Two
C) Four
D) Three
  • 6. Where do the three longitudinal arteries travel?
A) Subarachnoid space
B) Epidural space
C) Central canal
D) Dura mater
  • 7. Which of the following is NOT one of the three longitudinal arteries?
A) Left posterior spinal artery
B) Radicular artery
C) Right posterior spinal artery
D) Anterior spinal artery
  • 8. What is the name of the largest anterior radicular artery?
A) Artery of Adamkiewicz
B) Neural crest artery
C) Anterior cerebral artery
D) Posterior segmental artery
  • 9. Between which levels does the artery of Adamkiewicz usually arise?
A) S1 and S3
B) C4 and T1
C) L1 and L2
D) T9 and L5
  • 10. What factor is secreted by the notochord to induce the floor plate?
A) Bone morphogenetic protein (BMP)
B) Netrins
C) Sonic hedgehog (SHH)
D) Acetylcholine
  • 11. What structure is induced by the floor plate to develop motor neurons?
A) Alar plate
B) Neural crest
C) Roof plate
D) Basal plate
  • 12. What structure separates the alar plate and the basal plate?
A) Sulcus limitans
B) Central canal
C) Floor plate
D) Anterior white commissure
  • 13. What substance induces the roof plate to develop sensory neurons?
A) Cerebrospinal fluid
B) Netrins
C) Bone morphogenetic protein (BMP)
D) Sonic hedgehog (SHH)
  • 14. From which progenitors do dorsal root ganglion neurons differentiate?
A) Roof plate
B) Neural crest
C) Alar plate
D) Floor plate
  • 15. What acts as chemoattractants for the decussation of pain and temperature neurons?
A) Sonic hedgehog
B) Radial glial cells
C) Netrins
D) Bone morphogenetic protein
  • 16. What is the result of impaired blood flow through critical radicular arteries?
A) Spinal cord infarction
B) Cervical enlargement atrophy
C) Loss of netrin secretion
D) Neural tube defect
  • 17. What is the correct order of the spinal cord development stages?
A) Spinal cord, neural tube, neural fold, neural plate
B) Neural tube, neural plate, spinal cord, neural fold
C) Neural plate, neural fold, neural tube, spinal cord
D) Neural fold, neural plate, neural tube, spinal cord
  • 18. What does the lumen of the neural tube form as cells proliferate?
A) Anterior white commissure
B) Central canal
C) Sulcus limitans
D) Ventricles
  • 19. What was the scientific finding regarding programmed cell death in the embryo?
A) It is necessary for correct assembly of the nervous system
B) It only occurs in the alar plate
C) It is prevented by Sonic hedgehog
D) It is a sign of neural tube defects
  • 20. Spontaneous embryonic activity plays a role in which of the following?
A) Neuron and muscle development
B) Initial formation of connections between spinal neurons
C) Secretion of bone morphogenetic protein
D) Development of the notochord
  • 21. How many pairs of spinal nerves form in the human spinal cord?
A) 12
B) 8
C) 31
D) 24
  • 22. Where do motor nerve rootlets branch out from?
A) Ventrolateral sulci
B) Central canal
C) Intervertebral foramen
D) Dorsal lateral sulci
  • 23. What is the name of the structure that anchors the spinal cord to the coccyx?
A) Cauda equina
B) Filum terminale
C) Conus medullaris
D) Lumbar cistern
  • 24. What is the collection of nerves inferior to the conus medullaris called?
A) Cauda equina
B) Lumbar cistern
C) Dorsal root
D) Filum terminale
  • 25. What is the primary component of white matter in the spinal cord?
A) Neuroglia cell bodies
B) Myelinated axons
C) Cell bodies of interneurons
D) Unmyelinated axons only
  • 26. What marks the demarcation between the central and peripheral nervous systems?
A) Conus medullaris
B) Funiculi
C) Nerve rootlets
D) Grey columns
  • 27. What is the term for functional clusters of nerve cell bodies within the CNS?
A) Rootlets
B) Horns
C) Nuclei
D) Funiculi
  • 28. How many cervical segments are there in the spinal cord?
A) 8
B) 12
C) 7
D) 5
  • 29. What is the name of the fluid-filled space in the inferior part of the vertebral canal?
A) Conus medullaris
B) Subarachnoid space
C) Central canal
D) Lumbar cistern
  • 30. What is the shape of the grey matter in the center of the spinal cord?
A) Circular
B) Oval
C) Butterfly
D) Triangular
  • 31. At approximately what age does the spinal cord stop growing in length?
A) Eighteen
B) Four
C) Twelve
D) Eight
  • 32. What structure does the spinal cord originate from in the lower brainstem?
A) Pons
B) Cerebellum
C) Medulla oblongata
D) Thalamus
  • 33. What is the approximate length of the spinal cord in an average adult male?
A) 50 cm
B) 40 cm
C) 43 cm
D) 45 cm
  • 34. What tissue fills the epidural space?
A) Nerve fibers
B) Meningeal fluid
C) Adipose tissue
D) Cerebrospinal fluid
  • 35. Which layer of the meninges is the outermost?
A) Dura mater
B) Pia mater
C) Denticulate ligament
D) Arachnoid mater
  • 36. What is the function of the dorsal roots?
A) Receiving sensory information
B) Transmitting motor commands
C) Controlling rhythmic movements
D) Supporting the spinal cord structure
  • 37. What is the shape of the gray matter in a cross-section of the spinal cord?
A) Rectangular
B) Circular
C) Butterfly-shaped
D) Ovoid
  • 38. What is the name of the groove on the ventral side of the spinal cord?
A) Anterior median fissure
B) Dorsal median fissure
C) Posterior median sulcus
D) Lateral sulcus
  • 39. What is the innermost layer of the meninges?
A) Epidural layer
B) Dura mater
C) Pia mater
D) Arachnoid mater
  • 40. Where does the primary axon travel if it enters the spinal cord below level T6 in the DCML pathway?
A) Lissauer's tract
B) Gracile fasciculus
C) Cuneate fasciculus
D) Spinothalamic tract
  • 41. In the DCML pathway, what is the location of the cuneate fasciculus relative to the gracile fasciculus?
A) Posterior
B) Medial
C) Anterior
D) Lateral
  • 42. What are the collections of secondary axons that pass anteriorly and medially from the dorsal column nuclei called?
A) Spinothalamic fibers
B) Internal arcuate fibers
C) Dorsal root fibers
D) Corticospinal fibers
  • 43. Where do secondary axons from the medial lemniscus terminate?
A) Ventral posterolateral nucleus
B) Red nucleus
C) Substantia nigra
D) Inferior olive
  • 44. Where does the primary neuron of the ALS synapse after ascending one to two levels?
A) Substantia gelatinosa
B) Nucleus cuneatus
C) Nucleus gracilis
D) Clarke's column
  • 45. What is the name of the tract that ascends before synapsing in the ALS?
A) Lissauer's tract
B) Gracile fasciculus
C) Cuneate fasciculus
D) Medial lemniscus
  • 46. Where do some pain fibers deviate to in the midbrain to create memories about pain?
A) Periaqueductal gray
B) Reticular formation
C) Nucleus raphes magnus
D) Ventral posterolateral nucleus
  • 47. What structure does the periaqueductal gray project to in order to help inhibit pain?
A) Nucleus raphes magnus
B) Hippocampus
C) Ventral posterolateral nucleus
D) Centromedian nucleus
  • 48. Which nucleus is associated with the projection from the reticular formation that causes diffuse pain?
A) Centromedian nucleus
B) Nucleus gracilis
C) Clarke's column
D) Ventral posterolateral nucleus
  • 49. What happens to the internal arcuate fibers after they leave their nucleus?
A) Enter the cuneate fasciculus
B) Decussate
C) Synapse in the substantia gelatinosa
D) Terminate in the cerebellum
  • 50. Where are the cell bodies of primary proprioceptive neurons located?
A) Dorsal root ganglia
B) Accessory cuneate nucleus
C) Ventral horn
D) Clarke's nucleus
  • 51. How many times does the ventral spinocerebellar tract decussate?
A) Zero
B) Two
C) One
D) Three
  • 52. Which cerebellar peduncle does the ventral spinocerebellar tract utilize?
A) Lateral cerebellar peduncle
B) Middle cerebellar peduncle
C) Superior cerebellar peduncle
D) Inferior cerebellar peduncle
  • 53. Which cerebellar peduncle does the dorsal spinocerebellar tract pass through?
A) Inferior cerebellar peduncle
B) Dorsal cerebellar peduncle
C) Superior cerebellar peduncle
D) Middle cerebellar peduncle
  • 54. What substance composes the descending tracts?
A) Connective tissue
B) White matter
C) Gray matter
D) Cerebrospinal fluid
  • 55. What is the primary function of the corticospinal tracts?
A) Pain processing
B) Vision processing
C) Temperature regulation
D) Coordinated limb movements
  • 56. What percentage of corticospinal axons cross at the decussation of the pyramids?
A) 100%
B) 10%
C) 90%
D) 50%
  • 57. Do tectospinal, vestibulospinal, and reticulospinal tracts cross the anterior white commissure?
A) Only the vestibulospinal tract does
B) Yes
C) No
D) Only the tectospinal tract does
  • 58. In mice, the projection from the somatosensory cortex to laminae III-V of the lumbar spinal cord aids in the detection of what?
A) Rhythmic movement
B) Deep pressure
C) Motor inhibition
D) Light touch
  • 59. What is the name of the congenital disorder where the spinal cord is split, usually at the upper lumbar level?
A) Transverse myelitis
B) Diastematomyelia
C) Spina bifida
D) Spinal stenosis
  • 60. Upper motor neuron damage in the spinal cord is characterized by which pattern of deficits?
A) Segmental myotome deficits
B) Ipsilateral deficits
C) Contralateral deficits
D) Bilateral atrophy
  • 61. Which of the following is a characteristic of lower motor neuron damage?
A) Spasticity
B) Hypotonia
C) Hypertonia
D) Hyperreflexia
  • 62. How long does spinal shock typically last?
A) 24–48 hours
B) 2 to 4 weeks
C) 1 week
D) 3 months
  • 63. What steroid is mentioned as a potential treatment for spinal cord injuries?
A) Prednisone
B) Methylprednisolone
C) Dexamethasone
D) Cortisone
  • 64. What is the primary focus of spinal cord injury treatment?
A) Limiting post-injury cell death
B) Increasing blood pressure
C) Reducing spinal fluid
D) Surgical removal of the spinal cord
  • 65. Which symptom is associated with upper motor neuron damage?
A) Hyperreflexia
B) Hypotonia
C) Hyporeflexia
D) Muscle atrophy
  • 66. Which of these is a non-traumatic cause of spinal cord injury?
A) Severing
B) Transverse myelitis
C) Laceration
D) Bruising
  • 67. What facilitates neural regeneration in the spinal cord?
A) Increasing pressure on the injury
B) Complete immobilization of neurons
C) Total cessation of movement
D) Maintaining electric transmission
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