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Progressive retinal atrophy (PRA) is a group of genetic diseases seen in certain breeds of dogs and, more rarely, cats. Similar to retinitis pigmentosa in humans, [1] it is characterized by the bilateral degeneration of the retina, causing progressive vision loss culminating in blindness.
Despite similar symptoms and blood test results to Cushing's disease, evaluation of dogs with SARDS did not reveal any tumors in the pituitary or adrenal glands, [9] and recent work has indicated significant differences in the clinical and laboratory test parameters between the two diseases. [10]
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.
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 ...
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.
Profound SSD is often confused with sensory discrimination disorder (SDD), a type of sensory processing disorder, and can lead to incorrect processing of sensory information or auditory input during interpersonal communications. Profound unilateral hearing loss is known to cause: Irritability; Sound aversion: any presence of noise, no matter ...
It is often due to diffuse axonal injury and demyelination. There may be peripheral and central symptoms, such as reduced auditory understanding in a complex listening environment, central auditory processing disorder and auditory hallucination. [23] Hyperacusis, that is the hypersensitivity to environmental noise can also develop. [24]
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.