Sumary of Specific insomnia symptoms impact cognition later in life:
- “While there is growing evidence for a link between insomnia and cognitive impairment in older adults, it has been difficult to interpret the nature of these associations given how differently both insomnia and cognitive impairment can present across individuals,”.
- Afsara Zaheed, a clinical science graduate student in the department of psychology at the University of Michigan, said in a press release..
- “By investigating associations between specific insomnia complaints and cognition over time using strong measures of cognitive ability, we hoped to gain additional clarity on whether and how these different sleep problems may lead to poor cognitive outcomes.”.
- Zaheed and colleagues examined which specific insomnia symptoms indicated performance in five cognitive domains 14 years later and whether depressive symptoms and/or vascular diseases mediated these relationships..
- Participants first reported insomnia symptoms in 2002 — which the researchers classified as study baseline — with four self-reported items about how often the patients had difficulty falling asleep, nighttime waking, early waking and feeling rested after waking..
- The researchers evaluated cognition in 2016 as part of the Harmonized Cognitive Assessment Protocol and operationalized with five factor scores on episodic memory, executive function, language, visuoconstruction and processing speed..
- Zaheed and colleagues reported that more frequent difficulty with falling asleep predicted worse episodic memory, executive function, language and processing speed performance, but not visuoconstruction..
- They also found that these relationships were mediated by depressive symptoms and vascular diseases in 2014 for all areas except for episodic memory….