Delayed Effects
Delayed Effects - Related Videos
07:05
The Precision of Visual Working Memory with Delayed Estimation
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Human memory is limited. Throughout most of its history, experimental psychology has focused on investigating the discrete, quantitative limits of memory—how many individual pieces of information a person can remember. Recently, experimental psychologists have also become interested in more qualitative limits—how precisely is information stored? The concept of memory precision can be both intuitive and elusive at once. It is...
07:47
Measuring Delay Discounting in Humans Using an Adjusting Amount Task
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Cited by 55 •
2016
Delay discounting refers to a decline in the value of a reward when it is delayed relative to when it is immediately available. We outline a computer-based delay discounting task that is easy to implement and allows for the quantification of the degree of delay discounting in human participants.
08:08
Eye Tracking, Cortisol, and a Sleep vs. Wake Consolidation Delay: Combining Methods to Uncover an Interactive Effect of Sleep and Cortisol on Memory
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Cited by 8 •
2014
We present a protocol used to discover an interactive effect between sleep and cortisol on memory consolidation, particularly for negative arousing images. Specifically, the experimental design utilizes eye tracking, salivary cortisol analysis, and behavioral memory testing – methods that can be used with both healthy and clinical participants.
03:50
A Technique to Generate a Novel Delivery Platform for a Delayed Burst Release of Molecules
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2025
This video demonstrates a method for the generation of a polymer bubble or polybubble-based novel platform that enables delayed burst release. Polyester-based polymers are used to form the polybubbles with core-shell structure, and small molecules and antigens can be used as cargo.
08:51
The Use of Thermal Infra-Red Imaging to Detect Delayed Onset Muscle Soreness
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Cited by 110 •
2012
The purpose of this investigation was to assess whether using an infra-red thermal camera is a valid tool for detecting and quantifying the muscle soreness after exercising.
FAQs
Slow absorption or distribution can postpone the time at which a drug reaches its relevant site of action. Tissue accumulation may also extend exposure beyond the initial administration period. These pharmacokinetic processes help explain why a response may not track the timing of dosing closely and why treatment outcomes or adverse reactions can appear later than expected.
A drug may be converted into an active metabolite that continues to produce pharmacological activity after the original compound has been administered. This creates a time difference between exposure to the parent drug and the observed response. Considering active metabolites can therefore clarify delayed therapeutic benefits or toxicity that would otherwise seem unrelated to the initial dose.
Prolonged receptor binding can maintain pharmacological signaling after the initial drug concentration or signal begins to decline. In other cases, downstream cellular changes continue after receptor activation has occurred. These mechanisms make the timing of the response depend not only on drug presence, but also on how long its biological effects persist within responsive tissues.
Repeated dosing can produce cumulative exposure when drug or drug-related activity persists between doses. A response may therefore intensify or emerge only after several administrations, rather than after the first dose. Recognizing this pattern supports interpretation of treatment outcomes and toxicity, particularly when apparent changes reflect accumulation instead of a new immediate drug action.
Dose scheduling should account for the possibility that therapeutic benefits or adverse reactions will not appear immediately after administration. Researchers can relate the timing of doses to slow absorption, tissue accumulation, active metabolites, or persistent cellular responses. This approach helps avoid judging treatment too early and supports schedules that reflect the duration of pharmacological activity.
Monitoring should continue beyond the period of initial drug exposure when delayed benefits or toxicity are plausible. Observations can be timed to capture effects associated with accumulation, active metabolites, prolonged receptor binding, or downstream changes. This is especially relevant for long-acting medicines, repeated treatment, and situations in which adherence or cumulative exposure influences the eventual response.
They are particularly important when evaluating long-acting medicines, cumulative exposure, treatment adherence, and responses that emerge only after repeated administration. In these settings, immediate observations may not represent the eventual therapeutic or toxic profile. Studying the timing of effects helps investigators distinguish an early response from a later outcome linked to continued pharmacological activity.
The timing and persistence of a response provide useful context for interpreting whether an observed outcome reflects a delayed therapeutic benefit or delayed toxicity. Linking the outcome to exposure patterns and mechanisms such as accumulation, active metabolites, or continued cellular signaling can improve interpretation. This distinction supports more appropriate evaluation of treatment outcomes and adverse reactions.