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Related Concept Videos

Direct Motor Pathways01:11

Direct Motor Pathways

The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and the...
ortho–para-Directing Deactivators: Halogens01:24

ortho–para-Directing Deactivators: Halogens

Halogens are ortho–para directors. They are more electronegative than carbon. Therefore, as ring substituents, they can withdraw electrons through the inductive effect and deactivate the aromatic ring towards electrophilic substitution. Halogens also have an electron-donating resonance effect on the ring, which influences the orientation of the incoming electrophile. If an electrophile attacks at the ortho or the para position, the halogen donates electrons and stabilizes the intermediate...
Impedances and Admittance01:23

Impedances and Admittance

In the realm of AC circuits, passive circuit elements like resistors, inductors, and capacitors take on a different character when characterized by phasor voltage and current. Their behavior is expressed through impedance, a vital concept in AC circuit analysis.
Impedance is a measure of resistance to sinusoidal current flow in an AC circuit. Unlike their behavior in DC circuits, where inductors appear as short circuits and capacitors as open circuits, the behavior of these components in AC...
Non-gated Ion Channels01:24

Non-gated Ion Channels

Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Diode: Forward bias01:20

Diode: Forward bias

In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
The behavior of a diode in forward bias...
Diode: Reverse bias01:14

Diode: Reverse bias

A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...

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Robotic Cochlear Implantation for Direct Cochlear Access
08:06

Robotic Cochlear Implantation for Direct Cochlear Access

Published on: June 16, 2022

We need a balanced debate on direct access.

D Bridges1, A Gallie, S Howe

  • 1Dental Hygienist, Gloucester, UK. dbrdh@me.com

British Dental Journal
|July 14, 2012
PubMed
Summary
This summary is machine-generated.

Dental hygienists (DHs) advocate for direct access (DA) to improve patient care. This commentary critiques an editorial, arguing it failed to provide a balanced discussion on the importance of DA for DHs.

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Area of Science:

  • Dental Hygiene
  • Healthcare Policy

Background:

  • Dental hygienists (DHs) are campaigning for direct access (DA) legislation.
  • A recent British Dental Journal (BDJ) editorial addressed DA but was perceived as unbalanced.

Purpose of the Study:

  • To critique the BDJ editorial regarding direct access for dental hygienists.
  • To express disappointment in the lack of a balanced debate on DA.

Main Methods:

  • Analysis of the BDJ editorial "Direct line lack of assurance".

Main Results:

  • The editorial was found to be a one-sided argument, not a balanced debate.
  • The authors' interest in the editorial diminished due to its perceived bias.

Conclusions:

  • The established group of dental professionals believes the BDJ editorial failed to adequately address the merits of direct access for dental hygienists.
  • Further balanced discussion is needed to explore the benefits of direct access in dental hygiene practice.