II. Anatomy

  1. entOlfactoryNerveGrayBB771.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  2. entOlfactoryNervesGrayBB772.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  3. entOlfactoryNerveGrayBB858.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)
  4. neuroOlfactoryBulbGrayBB755.gif Lewis (1918) Gray's Anatomy 20th ed (in public domain at Yahoo or BartleBy)

III. Course

  1. Olfactory tract divides into roughly 20 branches
  2. Perforates cribriform plate of the Ethmoid Bone

IV. Physiology

  1. Innervates olfactory mucosa
    1. Upper third of the nasal septum
    2. Superior nasal concha

V. Exam

  1. Precautions
    1. Ensure nasal patency
    2. Test one nostril at a time
    3. Avoid testing with noxious odors (e.g Ammonia)
      1. False positives due to Trigeminal Nerve stimulation
  2. Ability to identify odors
    1. Coffee
    2. Cloves
    3. Peppermint

VI. References

  1. Gilman (1989) Manter and Gatz Essentials of Neuroanatomy and Neurophysiology, Davis, p. 87-113
  2. Goldberg (2014) Clinical Neuroanatomy, p. 24-39
  3. Netter (1997) Atlas Human Anatomy, ICON Learning, p. 110-129

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Ontology: Structure of olfactory bulb (C0028936)

Definition (FMA) Segment of neural tree organ which is continuous with a set of olfactory nerves and an olfactory tract.
Definition (NCI_CDISC) Anatomical structure located in the vertebral forebrain that receives neural input regarding odors that have been detected by cells within the nasal cavity. The axons of olfactory receptor cells extend into the olfactory bulb. (NCI)
Definition (NCI) Anatomical structure located in the vertebral forebrain that receives neural input regarding odors that have been detected by cells within the nasal cavity. The axons of olfactory receptor cells extend into the olfactory bulb.
Definition (MSH) Ovoid body resting on the CRIBRIFORM PLATE of the ethmoid bone where the OLFACTORY NERVE terminates. The olfactory bulb contains several types of nerve cells including the mitral cells, on whose DENDRITES the olfactory nerve synapses, forming the olfactory glomeruli. The accessory olfactory bulb, which receives the projection from the VOMERONASAL ORGAN via the vomeronasal nerve, is also included here.
Concepts Body Part, Organ, or Organ Component (T023)
MSH D009830
SnomedCT 113302008
English Bulb, Olfactory, Bulbs, Olfactory, Olfactory Bulb, Olfactory Bulbs, olfactory bulbs, olfactory lobe (Barr & Kiernan), main olfactory bulb, Olf, olfactory bulb, Bulbus olfactorius, bulbus olfactorius (Morgagni), OLFACTORY BULB, BRAIN, OLFACTORY BULB, Main Olfactory Bulbs, Bulbs, Main Olfactory, Olfactory Bulb, Main, Main Olfactory Bulb, Bulbus Olfactorius, Olfactorius, Bulbus, Bulb, Main Olfactory, Olfactory Bulbs, Main, Olfactory bulb, Structure of olfactory bulb (body structure), Structure of olfactory bulb
Swedish Luktlob
Czech bulbus olfactorius
Finnish Hajukäämi
Russian OBONIATEL'NAIA LUKOVITSA, ОБОНЯТЕЛЬНАЯ ЛУКОВИЦА
Latvian Ožas sīpols
Polish Opuszka węchowa
Norwegian Lukteløk, Luktekolbe, Bulbus olfactorius
Spanish bulbo olfatorio, estructura del bulbo olfatorio (estructura corporal), estructura del bulbo olfatorio, Bulbo Olfatorio
French Bulbe olfactif
German Bulbus olfactorius
Italian Bulbo olfattivo
Dutch Bulbus olfactorius
Portuguese Bulbo Olfatório

Ontology: Olfactory Nerve (C0028938)

Definition (FMA) Set of nerves that is continuous with the olfactory bulb and the olfactory bulb.
Definition (FMA) Segment of neural tree organ which is continuous with the olfactory epithelium and an olfactory bulb.
Definition (NCI_CDISC) The first cranial nerve.
Definition (NCI) The first cranial nerve. It is the shortest cranial nerve and of paramount importance in the sense of smell. Its neurons are in the olfactory mucosa in the nasal cavity.
Definition (MSH) The 1st cranial nerve. The olfactory nerve conveys the sense of smell. It is formed by the axons of OLFACTORY RECEPTOR NEURONS which project from the olfactory epithelium (in the nasal epithelium) to the OLFACTORY BULB.
Definition (CSP) first cranial nerve; conveys the sense of smell; it is formed by the axons of olfactory receptor neurons which project from the olfactory epithelium (in the nasal epithelium) to the olfactory bulb.
Concepts Body Part, Organ, or Organ Component (T023)
MSH D009832
SnomedCT 11522000
English Nerve, Olfactory, Nerves, Olfactory, Olfactory Nerve, Olfactory Nerves, Olfactory nerve (I), Cranial Nerve I, Cranial Nerve, First, Cranial Nerves, First, First Cranial Nerve, First Cranial Nerves, I, Cranial Nerve, Nerve I, Cranial, Nerve, First Cranial, Nerves, First Cranial, CI - Cranial nerve I, cranial nerve I, Olfactory nerve [I], Set of olfactory nerves, Olfactory nerves, Olfactory nerves set, Nervus olfactorius [I], olfactory nerves, i nerves, cranial i nerves, Is, Cranial Nerve, Nerve Is, Cranial, Cranial Nerve Is, olfactory fila, olfactoria fila, 1n, olfactory nerve, first cranial nerve, Nerve I, Nervus olfactorius, Fila olfactoria, OLFACTORY NERVE, Fila, Olfactory, Olfactory Fila, Filas, Olfactory, Olfactory Filas, Olfactoria, Fila, Olfactorias, Fila, Fila Olfactoria, Fila Olfactorias, First cranial nerve, Olfactory nerve, Cranial nerve I, Olfactory nerve structure (body structure), Olfactory nerve structure, Olfactory nerve, NOS
French Premier nerf crânien, Nerf crânien I, Nerf crânien 1, Première paire crânienne, Nerf olfactif
Swedish Luktnerv
Spanish estructura del nervio olfativo, Par Craneal I, Primer Par Craneal, Nervio Craneal I, I Par Craneal, I par craneal, nervio craneal I, primer par craneal, primer par craneano, estructura del nervio olfativo (estructura corporal), filete olfativo, nervio olfativo, nervio olfatorio, estructura del nervio olfatorio (estructura corporal), estructura del nervio olfatorio, I Nervio Craneal, Nervio Olfatorio, Primer Nervio Craneal
Czech čichový nerv, nervus olfactorius, I. hlavový nerv
Finnish Hajuhermo
Russian OBONIATEL'NYI NERV, ОБОНЯТЕЛЬНЫЙ НЕРВ
Japanese 嗅神経, 第1脳神経
German ERSTER HIRNNERV, Hirnnerv I, I. Hirnnerv, Nervus olfactorius
Italian Nervo cranico I, Primo nervo cranico, Nervo olfattivo
Latvian Ožas nervs
Polish Nerw węchowy, Nerw I
Norwegian Luktenerve, 1. hjernenerve, Nervus olfactorius, Hjernenerve 1
Portuguese I Nervo Craniano, Par Craniano I, Primeiro Par Craniano, I Par Craniano, Nervo Craniano I, Nervo Olfatório, Primeiro Nervo Craniano
Dutch Ie hersenzenuw, Nervus cranialis I, Nervus olfactorius, Reukzenuw