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Auditory processing disorder (APD) is a neurodevelopmental disorder affecting the way the brain processes sounds. [2] Individuals with APD usually have normal structure and function of the ear, but cannot process the information they hear in the same way as others do, which leads to difficulties in recognizing and interpreting sounds, especially the sounds composing speech.
They believed that the external environment influences the auditory hallucinations, showing worsening of symptoms in quieter environments than in noisier ones. [ 8 ] [ 17 ] [ 18 ] Oliver Sacks' patient, Mrs. O'C, reported being in an "ocean of sound" despite being in a quiet room due to a small thrombosis or infarction in her right temporal lobe.
Cortical deafness is a rare form of sensorineural hearing loss caused by damage to the primary auditory cortex.Cortical deafness is an auditory disorder where the patient is unable to hear sounds but has no apparent damage to the structures of the ear (see auditory system).
Spatial hearing loss can be diagnosed using the Listening in Spatialized Noise – Sentences test (LiSN-S), [25] which was designed to assess the ability of children with central auditory processing disorder (CAPD) to understand speech in background noise.
In most cases the disorder is transient and the symptoms mitigate into auditory agnosia (although chronic cases were reported [25]). Similarly, a monkey study [26] that ablated both auditory cortices of monkeys reported of deafness that lasted 1 week in all cases, and that was gradually mitigated into auditory agnosia in a period of 3–7 weeks.
Auditory processing disorder – Developmental or acquired neurological disorders; Catatonia – Psychiatric behavioural syndrome; Hyperacusis – Increased sensitivity to sound and decreased tolerance of noise; Hyperesthesia – Abnormal increase in sensitivity to sensory stimuli; Misophonia – Disorder of decreased tolerance to specific sounds
Musical ear syndrome (MES) is a condition seen in people who have hearing loss and subsequently develop auditory hallucinations. "MES" has also been associated with musical hallucinations, which is a complex form of auditory hallucinations where an individual may experience music or sounds that are heard without an external source. [1]
Amblyaudia can be conceptualized as the auditory analog of the better known central visual disorder amblyopia. The term “lazy ear” has been used to describe amblyaudia although it is currently not known whether it stems from deficits in the auditory periphery (middle ear or cochlea) or from other parts of the auditory system in the brain ...