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Cognitive disengagement syndrome (CDS) is a syndrome characterized by developmentally inappropriate, impairing, and persistent levels of decoupled attentional processing from the ongoing external context and resultant hypoactivity.
This includes speed of counting, reaching for things, repeating words, and other developing vocal and motor skills that develop quickly in growing children. [96] Once reaching early maturity, there is then a long period of stability until speed of processing begins declining from middle age to senility (Salthouse, 2000). [97]
Bradyphrenia is the slowness of thought common to many disorders of the brain. [1] Disorders characterized by bradyphrenia include Parkinson's disease and forms of schizophrenia consequently causing a delayed response and fatigue. [2]
One is the processing speed theory of cognitive aging by Tim Salthouse. [67] Drawing on the finding that cognitive processes generally slow as people grow older, Salthouse argues that slower processing leaves more time for working memory content to decay, thus reducing effective capacity.
Slow processing may manifest in behavior as signaling a lack of motivation on behalf of the learner. However, slow processing is reflective of an impairment of the ability to coordinate and integrate multiple skills and information sources. [91] The main concern with individuals with autism regarding learning is in the imitation of skills. [61]
In 2010, experiments that have tested for the significance of under-performance of memory for an older adult group as compared to a young adult group, hypothesized that the deficit in associate memory due to age can be linked with a physical deficit. This deficit can be explained by the inefficient processing in the medial-temporal regions.
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Nerve impulses are extremely slow compared to the speed of electricity, where the electric field can propagate with a speed on the order of 50–99% of the speed of light; however, it is very fast compared to the speed of blood flow, with some myelinated neurons conducting at speeds up to 120 m/s (432 km/h or 275 mph) [citation needed].