Stress hormones at the time of learning new memory formation; the presence of stress hormones at the time of recall retrieval of older memories.

Stress hormones at the time of learning often improve new memory formation; the presence of stress hormones at the time of recall often impair retrieval of older memories.

Around the time of learning, stress marked by the increased presence of cortisol can improve the formation of new memory. Research has proven this true.

However, when it is time to recall the information, stress will hinder the effective remembrance of pieces of information.

So, if the cortisol hormone is high at the point when some information is to be recollected, there would be difficulties in the retrieval of memories.

Learn more about Stress and memory here:

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Stress hormones at the time of learning __interferes___ new memory formation; the presence of stress hormones at the time of recall _impairs retrieval of older memories.

Explanation:

When stressed, the human body produces some stress hormone. Some of these hormones can affect certain parts of the brain, interfering with the encoding of new memory,  and inhibiting the recall of long term or older memories. An example of a stress hormone responsible for negatively affecting long-term, delayed recall memory is the cortisol, and the effect is usually felt at the hippocampus, prefrontal cortex and the amygdala.

could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )