Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

The Effect of Aging on Tissues

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...

Aging

Aging

Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...

Photoreceptors and Visual Pathways

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...

Perception of Sound Waves

Perception of Sound Waves

The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...

Pharmacodynamics in Geriatric Patients: Effects of Age

Pharmacodynamics in Geriatric Patients: Effects of Age

Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...

Cognitive Development During Adulthood

Cognitive Development During Adulthood

Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...

You might also read

Related Articles

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

Sort by

Same author

Critical role of EEG signals in assessment of sex-specific insights in neurological diagnostics via machine learning approach.

Scientific reports·2025

Same author

Psychophysically measuring the efficiency of rods.

Journal of vision·2025

Same author

Re: Rubin et al: Eccentric Viewing Training for Age-related Macular Disease: Results of a Randomized Controlled Trial (the EFFECT Study).

Ophthalmology science·2025

Same author

Follow-up in low vision rehabilitation for users of assistive technology: a scoping review.

Disability and rehabilitation. Assistive technology·2024

Same author

No transfer of 3D-Multiple Object Tracking training on game performance in soccer: A follow-up study.

Psychology of sport and exercise·2024

Same author

Auditory Noise Facilitates Lower Visual Reaction Times in Humans.

Biology·2024

Search research articles

Related Experiment Video

Updated: May 7, 2026

Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae

Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae

Published on: April 21, 2022

Contrast sensitivity, healthy aging and noise.

Rémy Allard¹, Judith Renaud, Sandra Molinatti

¹Visual Psychophysics and Perception Laboratory, Université de Montréal, Canada; School of Optometry, Université de Montréal, Canada.

Vision Research

|September 28, 2013

Summary

This summary is machine-generated.

Healthy aging causes contrast sensitivity loss, but the reason differs with noise type. Extended noise reveals aging doesn't impact low-spatial-frequency calculation efficiency, contrary to previous findings with local noise.

Keywords:

Aging Calculation efficiency Contrast sensitivity function External noise paradigms Internal noise

More Related Videos

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses

Published on: January 23, 2017

Related Experiment Videos

Last Updated: May 7, 2026

Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae

Immunolabeling and Counting Ribbon Synapses in Young Adult and Aged Gerbil Cochleae

Published on: April 21, 2022

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses

Published on: January 23, 2017

Area of Science:

Vision Science
Human Aging Research
Perceptual Psychology

Background:

External noise paradigms are used to study age-related contrast sensitivity loss.
Previous studies used localized noise, potentially altering processing strategies.
A recent study highlighted strategy changes with localized noise, questioning its validity.

Purpose of the Study:

To reassess age-related contrast sensitivity loss using spatiotemporally extended external noise.
To compare results from localized and extended noise paradigms.
To clarify the impact of aging on visual processing efficiency at different spatial frequencies.

Main Methods:

Measured contrast thresholds in young and older adults.
Utilized three noise conditions: noise-free, local noise, and extended (full-screen dynamic) noise.
Tested at three spatial frequencies (1, 3, and 9 cycles per degree).

Main Results:

At higher spatial frequencies, both noise types showed sensitivity loss due to reduced calculation efficiency.
At the lowest spatial frequency, extended noise attributed loss to internal equivalent noise.
Extended noise indicated that healthy aging does not impair calculation efficiency at low spatial frequencies.

Conclusions:

The type of external noise used significantly impacts the interpretation of age-related visual processing changes.
Spatiotemporally extended noise is recommended to avoid strategy changes and better mimic internal noise.
Contrary to prior research, healthy aging does not affect calculation efficiency at low spatial frequencies.