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Related Concept Videos

Learning Disabilities01:25

Learning Disabilities

Learning disabilities are cognitive disorders caused by neurological impairments that affect cognitive functions like language and reading, without indicating overall intellectual or developmental challenges. These disabilities differ from global intellectual or developmental disabilities as they are limited to distinct cognitive functions. Common learning disabilities include dysgraphia, dyslexia, and dyscalculia, each of which impacts unique aspects of learning.
Dyslexia
Dyslexia is a...
Hearing01:31

Hearing

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.
Unrenewable Cells00:50

Unrenewable Cells

In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of their outer...
Intellectual Disability01:29

Intellectual Disability

Intellectual disability (ID) is a neurodevelopmental condition characterized by deficits in intellectual and adaptive functioning that manifest during the developmental period. This condition encompasses challenges in reasoning, memory, problem-solving, and learning, accompanied by impairments in everyday life skills, such as communication, self-care, and social interactions. Intellectual disability affects approximately 1% of the population in the United States, impacting an estimated 5...
Auditory Pathway01:15

Auditory Pathway

Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
Neuroplasticity01:01

Neuroplasticity

Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.

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Related Experiment Video

Updated: Jun 19, 2026

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
11:39

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique

Published on: September 7, 2022

Deafness--the neglected and hidden disability.

I Mackenzie1, A Smith

  • 1World Health Organization Collaborating Centre for Prevention of Deafness, Child and Reproductive Health, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK. macken34@liv.ac.uk

Annals of Tropical Medicine and Parasitology
|October 15, 2009
PubMed
Summary
This summary is machine-generated.

Hearing loss, including age-related presbyacusis, is a growing global issue impacting speech, learning, and social interaction. This lifelong disability disproportionately affects developing nations with limited resources.

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Last Updated: Jun 19, 2026

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
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Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
09:44

Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss

Published on: January 25, 2016

Area of Science:

  • Audiology
  • Public Health
  • Gerontology

Background:

  • Global increase in deafness and hearing loss, particularly age-related presbyacusis.
  • Hearing loss is a chronic disability impacting speech, language, cognitive skills, education, and employment.
  • Social consequences include communication difficulties, isolation, and stigmatization, especially in developing countries.

Purpose of the Study:

  • To highlight the increasing global burden of hearing loss.
  • To underscore the multifaceted impacts of hearing impairment across age groups and socioeconomic contexts.
  • To emphasize the challenges faced in developing nations regarding hearing loss management and awareness.

Main Methods:

  • Literature review and synthesis of existing data on hearing loss prevalence and impact.
  • Analysis of the consequences of hearing loss on child development and adult life.
  • Examination of the specific challenges and resource limitations in developing countries.

Main Results:

  • Presbyacusis is rising globally due to aging populations.
  • Hearing loss significantly hinders speech, language, cognitive development, and educational/occupational attainment.
  • Social isolation and stigmatization are common, exacerbated by limited support services in developing regions.

Conclusions:

  • Hearing loss presents a substantial and growing global health challenge with profound individual and societal consequences.
  • The impact of hearing loss is magnified in developing countries due to inadequate resources and awareness.
  • Further research is needed to quantify the economic effects of hearing impairment in these regions.