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Related Concept Videos

Cranial Nerves: Types Part I01:14

Cranial Nerves: Types Part I

Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves, with the first six being essential in sensory perception, motor control, and autonomic functions related to the head and neck.
Olfactory Nerve (Cranial Nerve I)
The olfactory nerve, or cranial nerve I, is unique as it is purely sensory and dedicated to the sense of smell. This nerve originates in the olfactory epithelium of the...
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
The olfactory...
Cranial Nerves: Overview and Anatomy01:19

Cranial Nerves: Overview and Anatomy

The cranial nerves are an important part of the complex network of nerves in the human body. These nerves emerge directly from the brain and are responsible for transmitting essential information between the brain and various parts of the head and neck. There are 12 pairs of cranial nerves, systematically numbered using Roman numerals from I to XII, beginning from the anterior and moving to the posterior of the brain. Each cranial nerve is uniquely identified by names that reflect its function...
Olfaction01:25

Olfaction

The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
Cranial Nerves: Types Part II01:22

Cranial Nerves: Types Part II

Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves. While the first six innervate the head and neck, the latter six nerves innervate the head and neck, as well as organs and tissues in the thoracic and abdominal cavities. They facilitate communication, expression, and autonomic control within the human body.
Facial Nerve (Cranial Nerve VII)
Cranial nerve VII, or the facial nerve,...

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The Olfactory System as a Model to Study Axonal Growth Patterns and Morphology In Vivo
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Imaging the olfactory tract (cranial nerve #1).

Thierry P Duprez1, Philippe Rombaux

  • 1Department of Radiology and Medical Imaging, Université catholique de Louvain, Cliniques Universitaires Saint-Luc, Avenue Hippocrate, 10, 1200-Brussels, Belgium. Thierry.Duprez@uclouvain.be

European Journal of Radiology
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This review examines radiological imaging for the olfactory tract, discussing advanced MRI and CT technologies. It covers olfactory sense pathologies and quantitative/functional imaging techniques.

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Area of Science:

  • Radiology
  • Neuroimaging
  • Olfactory System Anatomy

Background:

  • The olfactory tract is crucial for smell perception.
  • Accurate imaging of the olfactory system is vital for diagnosing smell disorders.
  • Advances in radiological technology offer new possibilities for olfactory tract assessment.

Purpose of the Study:

  • To review and compare radiological modalities for olfactory tract imaging.
  • To highlight recent advancements in Magnetic Resonance (MR) and Computed Tomography (CT) for olfactory imaging.
  • To provide an overview of olfactory pathologies and quantitative/functional imaging techniques.

Main Methods:

  • Systematic review of radiological modalities (MRI, CT).
  • Pictorial overview of olfactory pathologies.
  • Description of techniques for measuring olfactory bulb volume and olfactory sulcus depth.
  • Discussion of functional imaging insights.

Main Results:

  • Comparison of the advantages and disadvantages of various radiological techniques.
  • Assessment of the benefits and limitations of newer MR and CT technologies.
  • Presentation of quantitative imaging data collection methods.
  • Exploration of functional imaging approaches for olfactory function.

Conclusions:

  • Radiological imaging plays a key role in evaluating olfactory tract disorders.
  • Advanced MR and CT technologies offer improved diagnostic capabilities for the olfactory system.
  • Quantitative and functional imaging provide valuable insights into olfactory function and pathology.