Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Hearing01:31

Hearing

57.2K
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
57.2K
Vascular Spasm01:16

Vascular Spasm

3.6K
The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
3.6K
Line Loss01:10

Line Loss

541
The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss.
Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...
541
Reducing Line Loss01:18

Reducing Line Loss

389
In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
389
Energy Losses in Transformers01:21

Energy Losses in Transformers

1.3K
In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality,  the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be  the high resistance of the...
1.3K
Major Losses in Pipes01:28

Major Losses in Pipes

2.0K
When a fluid flows through a pipe, it experiences energy losses due to frictional resistance along the pipe walls, known as major losses. These energy losses result in a pressure drop, which varies based on the flow conditions — whether laminar or turbulent — and the specific physical properties of the fluid and pipe.
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to viscous...
2.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Association of Early Supplemental Parenteral Nutrition with Clinical Outcomes in Patients with Traumatic Brain Injury.

Journal of Korean Neurosurgical Society·2026
Same author

Scalp salvage with acellular dermal matrix assistance for recurrent exposure of deep brain stimulation hardware: a case report.

Archives of craniofacial surgery·2026
Same author

Effect of Thermal Imidization Conditions on Polyimide Webs Derived from Poly(amic acid)/Lignin Nanofiber.

ACS omega·2026
Same author

Application of a conversational AI system for voice-interactive history taking in neurosurgical patients.

Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia·2026
Same author

Structural predictors of mechanical instability after posterolateral elbow dislocation: a magnetic resonance imaging-based threshold model.

Journal of shoulder and elbow surgery·2026
Same author

The Safety and Effectiveness of B/F/TAF for HIV-1 in a Prospective Multicenter Observational Study in the Republic of Korea.

Advances in therapy·2026

Related Experiment Video

Updated: Jan 31, 2026

Measurement of Myocardial Lactate Production for Diagnosis of Coronary Microvascular Spasm
06:18

Measurement of Myocardial Lactate Production for Diagnosis of Coronary Microvascular Spasm

Published on: September 17, 2021

1.9K

Delayed hearing loss after microvascular decompression for hemifacial spasm.

Min Ho Lee1, Seunghoon Lee1, Sang-Ku Park2

  • 1Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea.

Acta Neurochirurgica
|December 21, 2018
PubMed
Summary

Delayed hearing loss can occur after microvascular decompression for hemifacial spasm. Brainstem auditory evoked potential changes during surgery may indicate a risk, warranting further investigation.

Keywords:
Brain stem auditory evoked potentialsHearing lossHemifacial spasmMicrovascular decompression

More Related Videos

Microvascular Decompression: Salient Surgical Principles and Technical Nuances
10:35

Microvascular Decompression: Salient Surgical Principles and Technical Nuances

Published on: July 5, 2011

47.3K
Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation
03:49

Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation

Published on: October 11, 2024

1.2K

Related Experiment Videos

Last Updated: Jan 31, 2026

Measurement of Myocardial Lactate Production for Diagnosis of Coronary Microvascular Spasm
06:18

Measurement of Myocardial Lactate Production for Diagnosis of Coronary Microvascular Spasm

Published on: September 17, 2021

1.9K
Microvascular Decompression: Salient Surgical Principles and Technical Nuances
10:35

Microvascular Decompression: Salient Surgical Principles and Technical Nuances

Published on: July 5, 2011

47.3K
Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation
03:49

Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation

Published on: October 11, 2024

1.2K

Area of Science:

  • Neurosurgery
  • Audiology
  • Neurology

Background:

  • Microvascular decompression (MVD) is a common treatment for hemifacial spasm (HFS).
  • Postoperative hearing loss is a known complication, but delayed onset is less understood.

Purpose of the Study:

  • To analyze cases of delayed hearing loss following MVD for HFS.
  • To identify characteristic features and potential predictors of delayed hearing loss.

Main Methods:

  • Retrospective review of 3462 patients undergoing MVD for HFS.
  • Analysis of cases with delayed sensorineural hearing loss post-surgery.

Main Results:

  • Five cases of delayed hearing loss were identified, occurring 10-45 days post-MVD.
  • Sensorineural hearing loss was confirmed and treated with corticosteroids, with hearing recovery in several months.
  • Prolonged inter-peak latency of brainstem auditory evoked potential (BAEP) waves I-III during surgery was observed.

Conclusions:

  • Delayed hearing loss is a potential complication of MVD for HFS.
  • BAEP changes during surgery may be associated with delayed hearing loss.
  • Further research is needed to confirm BAEP's predictive utility and the exact cause of delayed hearing loss.