How Stress Affects Your Memory

The relationship between stress and memory is complex. A little bit of stress can enhance your ability to encode, store, and retrieve factual information. Too much stress, however, can shut the system down. You may have had this experience studying for a test. A moderate amount of anxiety is motivating and will help you perform better. Too much on the other hand, especially while taking the actual test, can prevent you from recalling what you know. The experience of trauma and chronic stress over time can actually change the brain structures involved in memory. To understand how this happens, we need to consider one of the ways memories are formed and recalled. When we have a sensory experience, the amygdala (associated with processing emotion) influences the hippocampus (associated with processing memory) to encode and store the information. Emotionally charged events (both positive and negative) form stronger memories. Later, when it comes time to retrieve a memory, the prefrontal cortex gives the command. All three of these brain structures are also involved in traumatic stress. Chronic Stress and Memory When we experience a threat, the amygdala sets off an alarm which puts the nervous system and body into fight or flight mode. This system exposes the brain and body to high levels of circulating stress hormones. Research has shown that high levels of stress hormones over time can damage the hippocampus (it actually shrinks). This reduces its ability to encode and form ...
Source: World of Psychology - Category: Psychiatry & Psychology Authors: Tags: Anxiety and Panic Memory and Perception Stress Trauma Source Type: blogs