Dictionary > Olfactory nerve

Olfactory nerve

Definition
noun, plural: olfactory nerves
The cranial nerve comprised of sensory nerve fibers that carry impulses for the sense of smell (olfaction)
Supplement
Cranial nerves are paired nerves that emerge from the brain and the brainstem. They supply the motor pathways between organs in the face and the upper body, and account for detecting and processing various sensations.
In humans, the olfactory nerve is one of the many cranial nerves. It is considered as the first cranial nerve, and therefore is also typically referred to as cranial nerve I (CN I).
The olfactory nerve is the cranial nerve that carries impulses for the sense of smell. It is comprised of numerous olfactory filaments, which in turn, is made up thin, unmyelinated axons of 8 to 12 of the bipolar olfactory receptor cells in the olfactory portion of the nasal mucosa. The olfactory filaments pass through the cribriform plate of the ethmoid bone and enter the olfactory bulb, where they terminate in synaptic contact with mitral cells, tufted cells, and granule cells.
The olfactory nerve originates on the olfactory mucosa of the nasal cavity. Compared with other cranial nerves, the olfactory nerve is capable of some regeneration when it is damaged.
Synonym(s):

  • nervi olfactorii
  • fila olfactoria
  • first cranial nerve
  • nerve of smell
  • olfactory fila
  • cranial nerve I (CN I)

See also:

  • cranial nerve
  • olfactory tract
  • olfaction


    You will also like...

    Still Water Community Plants
    Still Water Community Plants

    This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..

    An artist depiction of a Precambrian multicellular life form.
    The Evolution of Cell Organelles

    The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..

    Kidneys
    Kidneys and Regulation of Water and Inorganic Ions

    The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

    Sensory systems
    Sensory Systems

    A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

    Direct and indirect physiologic effects of growth hormone
    Animal Growth Hormones

    Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

    A chart depicting Mendel's Law of Dominance
    Mendel’s Law & Mendelian Genetics

    One of Mendel’s law of inheritance is the “law of dominance”. Read this tutorial to know more about this form of i..