The global impression of recovery of delirium in days was reported in 197/1,118 studies (17.6%) but such impressions are highly subjective and much inferior to regression of cognitive scores to a plateau.
In adolescence, cognitive function may reach a plateau that persists in adulthood.
Further, at least in AD, brain amyloid deposition seems to be a very early phenomenon and rather rapidly reaches a "plateau" at the time cognitive deficits become detectable [ 123], thus mirroring A β 1 42 levels in cerebrospinal fluid [ 124].
Dramatic medial and superior temporal drebrin loss plateaus early with mild cognitive impairment by MMSE 26 [ 12], so loss has already occurred in trial subjects.
Elderly people with regular concurrent cognitive stimulation, on the other hand, seemed to plateau in their level of performance and did not show any significant change.
Symptoms, cognitive function, and counterregulatory hormones were measured at each glucose plateau (5.0, 3.4, 3.4, 2.8, and 2.4 mmol/L), with each step lasting 40 min with subjects kept blinded to their actual glucose value throughout clamp studies.
Follow-up studies (N = 5) demonstrated long-term improvements in cognitive and psychological outcomes (N = 3), and the intervention groups showed a plateau effect of cognitive functioning compared with the cognitive decline experienced by control groups (N = 2).
Hypoglycaemic symptom score (HSS), hypoglycaemic awareness, cognitive function, counter-regulatory hormones and vital signs were assessed during each glucose plateau.
Many cognitive functions, which have been slowly improving up to this point, start to plateau, and then decline (Schaie et al. 2004).
The observational associations suggested a plateau effect, where any alcohol consumption per week was associated with higher cognitive scores compared with individuals consuming 0 units per week, with no apparent gradient among drinkers.
Reportedly, individuals with AS plateau at a developmental level of between 24 and 30 months, 12 and cognitive performance is usually in the range of severe functional impairment.
