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Cranial Nerve Flashcards: Names, Numbers, Functions & Tests

Learn all 12 cranial nerves with 84 focused cards on names, numbers, classification as sensory, motor, or mixed, core functions, and safe high-level exam cues.

By author Open Study Contributor

About this deck

Build reliable recall of all 12 cranial nerves without turning a focused study session into an anatomy encyclopedia. These 84 original English cards practice number-to-name and name-to-number recall, sensory/motor/mixed classification, core functions and pathways, and one safe high-level assessment cue for each nerve.

The sequence starts with identity in both useful directions, moves into classification, then interleaves functions across the nerves before ending with assessment cues. Related prompts are spaced apart so nearby cards do not hand you the next answer.

This deck deliberately leaves out symptom diagnosis, lesion localization, treatment, detailed nuclei and foramina, traditional mnemonic phrases, and self-assessment. It is an educational study aid, not medical advice or a substitute for supervised clinical training.

The questions, answers, organization, metadata, and original generated cover are independently authored from common knowledge and released under CC0 1.0 to the extent applicable rights exist. Scope and facts were checked against NCBI Bookshelf cranial-nerve references and the Merck Manual Professional neurological examination guide.

Cards in this deck

  1. Card 1

    Question

    CN I — nerve name?

    Answer

    Olfactory nerve.

  2. Card 2

    Question

    CN II — nerve name?

    Answer

    Optic nerve.

  3. Card 3

    Question

    CN III — nerve name?

    Answer

    Oculomotor nerve.

  4. Card 4

    Question

    CN IV — nerve name?

    Answer

    Trochlear nerve.

  5. Card 5

    Question

    Olfactory nerve — cranial nerve number?

    Answer

    CN I.

  6. Card 6

    Question

    CN V — nerve name?

    Answer

    Trigeminal nerve.

  7. Card 7

    Question

    Optic nerve — cranial nerve number?

    Answer

    CN II.

  8. Card 8

    Question

    CN VI — nerve name?

    Answer

    Abducens nerve.

  9. Card 9

    Question

    Oculomotor nerve — cranial nerve number?

    Answer

    CN III.

  10. Card 10

    Question

    CN VII — nerve name?

    Answer

    Facial nerve.

  11. Card 11

    Question

    Trochlear nerve — cranial nerve number?

    Answer

    CN IV.

  12. Card 12

    Question

    CN VIII — nerve name?

    Answer

    Vestibulocochlear nerve.

  13. Card 13

    Question

    Trigeminal nerve — cranial nerve number?

    Answer

    CN V.

  14. Card 14

    Question

    CN IX — nerve name?

    Answer

    Glossopharyngeal nerve.

  15. Card 15

    Question

    Abducens nerve — cranial nerve number?

    Answer

    CN VI.

  16. Card 16

    Question

    CN X — nerve name?

    Answer

    Vagus nerve.

  17. Card 17

    Question

    Facial nerve — cranial nerve number?

    Answer

    CN VII.

  18. Card 18

    Question

    CN XI — nerve name?

    Answer

    Accessory nerve, also called the spinal accessory nerve.

  19. Card 19

    Question

    Vestibulocochlear nerve — cranial nerve number?

    Answer

    CN VIII.

  20. Card 20

    Question

    CN XII — nerve name?

    Answer

    Hypoglossal nerve.

  21. Card 21

    Question

    Glossopharyngeal nerve — cranial nerve number?

    Answer

    CN IX.

  22. Card 22

    Question

    Vagus nerve — cranial nerve number?

    Answer

    CN X.

  23. Card 23

    Question

    Accessory nerve — cranial nerve number?

    Answer

    CN XI.

  24. Card 24

    Question

    Hypoglossal nerve — cranial nerve number?

    Answer

    CN XII.

  25. Card 25

    Question

    CN I (olfactory) — sensory, motor, or mixed?

    Answer

    Sensory.

  26. Card 26

    Question

    CN VIII (vestibulocochlear) — sensory, motor, or mixed?

    Answer

    Sensory.

  27. Card 27

    Question

    CN III (oculomotor) — sensory, motor, or mixed?

    Answer

    Motor. Its motor classification includes somatic motor and parasympathetic output.

  28. Card 28

    Question

    CN VII (facial) — sensory, motor, or mixed?

    Answer

    Mixed.

  29. Card 29

    Question

    CN XI (accessory) — sensory, motor, or mixed?

    Answer

    Motor.

  30. Card 30

    Question

    CN II (optic) — sensory, motor, or mixed?

    Answer

    Sensory.

  31. Card 31

    Question

    CN V (trigeminal) — sensory, motor, or mixed?

    Answer

    Mixed.

  32. Card 32

    Question

    CN IX (glossopharyngeal) — sensory, motor, or mixed?

    Answer

    Mixed.

  33. Card 33

    Question

    CN IV (trochlear) — sensory, motor, or mixed?

    Answer

    Motor.

  34. Card 34

    Question

    CN X (vagus) — sensory, motor, or mixed?

    Answer

    Mixed.

  35. Card 35

    Question

    CN XII (hypoglossal) — sensory, motor, or mixed?

    Answer

    Motor.

  36. Card 36

    Question

    CN VI (abducens) — sensory, motor, or mixed?

    Answer

    Motor.

  37. Card 37

    Question

    CN I (olfactory) — primary sensory function?

    Answer

    Smell, or olfaction.

  38. Card 38

    Question

    CN II (optic) — what information does it carry from the retina?

    Answer

    Visual sensory information.

  39. Card 39

    Question

    CN III (oculomotor) — which four extraocular muscles does it innervate?

    Answer

    Superior rectus, inferior rectus, medial rectus, and inferior oblique.

  40. Card 40

    Question

    CN IV (trochlear) — extraocular muscle target?

    Answer

    Superior oblique muscle.

  41. Card 41

    Question

    CN V1 (ophthalmic division) — main sensory territory?

    Answer

    The upper face, including the forehead and cornea.

  42. Card 42

    Question

    CN VI (abducens) — extraocular muscle target?

    Answer

    Lateral rectus muscle.

  43. Card 43

    Question

    CN VII (facial) — main somatic motor function?

    Answer

    Movement of the muscles of facial expression.

  44. Card 44

    Question

    CN VIII (vestibulocochlear) — cochlear branch function?

    Answer

    Hearing.

  45. Card 45

    Question

    CN IX (glossopharyngeal) — taste territory?

    Answer

    The posterior one-third of the tongue.

  46. Card 46

    Question

    CN X (vagus) — key motor targets in the mouth and throat?

    Answer

    The pharyngeal and soft-palate muscles used in swallowing.

  47. Card 47

    Question

    CN XI (accessory) — sternocleidomastoid function?

    Answer

    Turning the head to the opposite side.

  48. Card 48

    Question

    CN XII (hypoglossal) — main muscle targets?

    Answer

    The intrinsic and extrinsic tongue muscles, except palatoglossus.

  49. Card 49

    Question

    CN I (olfactory) — where do fibers from the nasal olfactory mucosa first synapse?

    Answer

    In the olfactory bulb, after passing through the cribriform plate.

  50. Card 50

    Question

    CN II (optic) — role in the pupillary light reflex?

    Answer

    It forms the afferent sensory limb that detects the light stimulus.

  51. Card 51

    Question

    CN III (oculomotor) — role in eyelid position?

    Answer

    It supplies levator palpebrae superioris, which elevates the upper eyelid.

  52. Card 52

    Question

    CN IV (trochlear) — key eye-movement contribution?

    Answer

    Through the superior oblique, CN IV intorts the eye; it depresses the eye most strongly in adduction.

  53. Card 53

    Question

    CN V2 (maxillary division) — main sensory territory?

    Answer

    The midface, including the cheek, upper lip, and maxillary teeth.

  54. Card 54

    Question

    CN VI (abducens) — primary eye movement?

    Answer

    Abduction: moving the eye laterally, away from the nose.

  55. Card 55

    Question

    CN VII (facial) — taste territory?

    Answer

    The anterior two-thirds of the tongue, carried through the chorda tympani.

  56. Card 56

    Question

    CN VIII (vestibulocochlear) — vestibular branch function?

    Answer

    Balance and sensory information about head orientation and motion.

  57. Card 57

    Question

    CN IX (glossopharyngeal) — what visceral sensory information comes from the carotid sinus and body?

    Answer

    Blood-pressure and blood-chemistry signals, respectively.

  58. Card 58

    Question

    CN X (vagus) — key laryngeal motor function?

    Answer

    Motor control of the intrinsic laryngeal muscles for phonation.

  59. Card 59

    Question

    CN VII (facial) — role in the corneal reflex?

    Answer

    It carries the efferent motor limb that closes the eyelids through orbicularis oculi.

  60. Card 60

    Question

    CN XII (hypoglossal) — role in tongue protrusion?

    Answer

    It supplies genioglossus, a principal muscle for protruding the tongue.

  61. Card 61

    Question

    CN III (oculomotor) — parasympathetic effect on the pupil?

    Answer

    Pupillary constriction through the sphincter pupillae.

  62. Card 62

    Question

    CN V3 (mandibular division) — main sensory territory?

    Answer

    Most of the lower face and jaw, plus mandibular teeth and general sensation from the anterior two-thirds of the tongue.

  63. Card 63

    Question

    CN VII (facial) — parasympathetic role in tear production?

    Answer

    It provides secretomotor input to the lacrimal gland.

  64. Card 64

    Question

    CN IX (glossopharyngeal) — motor target that assists swallowing?

    Answer

    Stylopharyngeus, which elevates the pharynx during swallowing.

  65. Card 65

    Question

    CN X (vagus) — main parasympathetic territory?

    Answer

    Thoracic and abdominal viscera, extending through much of the gastrointestinal tract.

  66. Card 66

    Question

    CN III (oculomotor) — parasympathetic role in near vision?

    Answer

    Lens accommodation through the ciliary muscle.

  67. Card 67

    Question

    CN V (trigeminal) — main motor function?

    Answer

    Motor control of the muscles of mastication through the mandibular division, V3.

  68. Card 68

    Question

    CN VII (facial) — parasympathetic role in salivation?

    Answer

    It provides secretomotor input to the submandibular and sublingual glands.

  69. Card 69

    Question

    CN IX (glossopharyngeal) — parasympathetic salivary target?

    Answer

    The parotid gland.

  70. Card 70

    Question

    CN X (vagus) — main visceral sensory territory?

    Answer

    The pharynx, larynx, and thoracic and abdominal organs.

  71. Card 71

    Question

    CN V (trigeminal) — role in the corneal reflex?

    Answer

    It carries the afferent sensory limb through the ophthalmic division, V1.

  72. Card 72

    Question

    CN XI (accessory) — trapezius function?

    Answer

    Elevating the shoulder, as in a shoulder shrug.

  73. Card 73

    Question

    CN I (olfactory) — one high-level assessment cue?

    Answer

    Ask the person to identify a familiar, nonirritating odor in each nostril separately, with the other nostril occluded.

  74. Card 74

    Question

    CN II (optic) — one high-level assessment cue?

    Answer

    Check visual acuity in each eye separately with an appropriate distance or near chart.

  75. Card 75

    Question

    CN III (oculomotor) — one high-level assessment cue?

    Answer

    Shine a light into each eye and observe brisk, symmetric direct and consensual pupillary constriction; CN III is the efferent limb.

  76. Card 76

    Question

    CN IV (trochlear) — one high-level assessment cue?

    Answer

    Have the person follow a target through an H pattern, watching the adducted eye as it looks down.

  77. Card 77

    Question

    CN V (trigeminal) — one high-level assessment cue?

    Answer

    With the eyes closed, compare light facial sensation across the V1, V2, and V3 territories on both sides.

  78. Card 78

    Question

    CN VI (abducens) — one high-level assessment cue?

    Answer

    Have the person follow a target into lateral gaze and check that each eye abducts smoothly.

  79. Card 79

    Question

    CN VII (facial) — one high-level assessment cue?

    Answer

    Compare facial-movement symmetry while the person smiles, raises the eyebrows, and closes the eyes tightly.

  80. Card 80

    Question

    CN VIII (vestibulocochlear) — one high-level assessment cue?

    Answer

    Screen hearing in each ear separately with a quiet whisper while the opposite ear is occluded.

  81. Card 81

    Question

    CN IX (glossopharyngeal) — one high-level assessment cue?

    Answer

    In a supervised exam, assess the sensory limb of the gag reflex alongside CN X; bilateral absence can occur in healthy people.

  82. Card 82

    Question

    CN X (vagus) — one high-level assessment cue?

    Answer

    Ask the person to say “ah” and observe whether the soft palate elevates symmetrically.

  83. Card 83

    Question

    CN XI (accessory) — one high-level assessment cue?

    Answer

    Compare shoulder elevation while the person shrugs against resistance.

  84. Card 84

    Question

    CN XII (hypoglossal) — one high-level assessment cue?

    Answer

    Ask the person to protrude the tongue and observe its position and movement.

Calm editorial illustration of a human profile with twelve luminous neural threads in navy, teal, coral, and ivory.

84 cards

Cranial Nerve Flashcards: Names, Numbers, Functions & Tests

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