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Related Concept Videos

Inertia Tensor01:24

Inertia Tensor

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The concept of the inertia tensor is employed to depict the mass distribution and rotational inertia of a solid or rigid object. This tensor is expressed through a three-by-three matrix. Each component within this matrix corresponds to varying moments of inertia about specific axes.
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Diffusion01:12

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Diffusion01:21

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Diffusion is a type of passive transport. In passive transport, a substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. For example, take the diffusion of substances through the air. When someone opens a perfume bottle in a room filled with people, the perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the...
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Difference from Background: Limit of Detection01:05

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The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
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Electric Potential and Potential Difference01:16

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Suppose a positive test charge moves away from a positive static charge, then the Coulomb force does positive work, and its electric potential energy decreases. The potential energy per unit charge is defined as the electric potential. The electric potential is independent of the test charge.
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Adrenergic Receptors: ɑ Subtype01:31

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Updated: Jan 22, 2026

Diffusion Tensor Magnetic Resonance Imaging in Chronic Spinal Cord Compression
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Diffusion tensor imaging reveals microstructural differences between subtypes of trigeminal neuralgia.

Matthew S Willsey1, Kelly L Collins1,2, Erin C Conrad1,3

  • 11Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan.

Journal of Neurosurgery
|July 20, 2019
PubMed
Summary
This summary is machine-generated.

Diffusion tensor imaging (DTI) reveals distinct microstructural differences in trigeminal neuralgia type 1 (TN1) versus type 2 (TN2). TN1 shows increased radial diffusivity and apparent diffusion coefficient in the pons, aiding subtype diagnosis.

Keywords:
diffusion tensor imagingfacial paintrigeminal neuralgia

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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
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Area of Science:

  • Neuroimaging
  • Neurology
  • Medical Physics

Background:

  • Trigeminal neuralgia (TN) is a facial pain syndrome with two main subtypes: TN1 (episodic) and TN2 (constant).
  • Diffusion tensor imaging (DTI) has shown microstructural changes in the trigeminal nerve in unilateral TN.
  • Understanding DTI differences between TN subtypes is crucial for diagnosis and treatment.

Purpose of the Study:

  • To investigate differences in DTI parameters between TN1 and TN2 subtypes.
  • To compare DTI findings in the pontine segment of the trigeminal tract between TN subtypes and controls.

Main Methods:

  • Enrolled 8 patients with TN1, 7 with TN2, and 23 controls.
  • Performed DTI with parameter measurements in the pontine trigeminal tract region of interest.
  • Compared DTI parameters (radial diffusivity, apparent diffusion coefficient, fractional anisotropy) between groups.

Main Results:

  • TN1 patients exhibited increased radial diffusivity and apparent diffusion coefficient in the pons compared to TN2 patients and controls.
  • No significant DTI differences were found between TN2 patients and controls.
  • In TN1, symptomatic sides showed increased radial diffusivity and decreased fractional anisotropy compared to asymptomatic sides.

Conclusions:

  • Noninvasive DTI can help differentiate TN1 and TN2 subtypes.
  • DTI may improve patient selection for surgical interventions.
  • DTI insights could inform prognosis, as TN1 generally has better surgical outcomes than TN2.