What Is Cognitive Performance?
Cognitive performance is a concept encompassing multiple domains or aspects of mental functioning, such as memory, attention and executive functions. Imagine these domains as a pyramid: at the base are the simplest ones, sensory tasks requiring minimal mental processing, while the top contains domains requiring multiple sensory and perceptual functions.
From the bottom of the pyramid to the top:
- Sensation and perception: everything related to vision, touch, hearing, taste and smell.
- Motor skills and construction: motor skills refer to aspects such as motor speed and manual dexterity, while construction is the ability to copy common objects.
- Attention and concentration: the ability to sustain attention for a given time and distinguish what to attend to and what to ignore.
- Memory: this encompasses many subdivisions, as it is one of the most complex cognitive processes.
- Executive functioning: reasoning and problem-solving.
- Processing speed: assessments of cognitive processing that require the rapid performance of tasks ranging from very simple to complex.
- Language skills
The Relationship Between Diet and Cognitive Performance
Diet has a major influence on cognitive development and performance. Nutrients such as omega 3 fatty acids, various antioxidants, B vitamins and minerals such as zinc and magnesium play an important role in the brain’s structural integrity and proper functioning.
Diet is also one of the key pillars in managing oxidative stress and cardiovascular health, both of which greatly influence brain function.
Nutrition’s role extends beyond enhancing cognitive performance: it also has a major influence on the prevention of cognitive decline.
How Does Poor Nutrition Affect Cognitive Development?
Eating ultra-processed foods is associated with poorer cognitive development during the growing years and greater decline in later life.
Pay attention to your intake of saturated and trans fats, which compromise cardiovascular health. Reduced blood flow to the brain caused by atherosclerosis compromises the delivery of oxygen and nutrients, affecting brain performance.
Dietary patterns associated with insulin resistance also increase the presence of reactive oxygen species in the body and, consequently, oxidative stress. This may contribute to the deterioration of complex functions such as executive functioning and memory.
In addition, a deficiency in nutrients key to cognitive health, such as those mentioned above (omega 3, zinc, magnesium, B6, B12, etc.), contributes to alterations in neuronal myelination, a process critical to cognitive development.
Which Foods Support Good Cognitive Performance?
Foods to prioritise for good performance and cognitive health include:
- Oily fish, for its omega 3 content.
- Nuts and seeds, rich in antioxidants and plant-based omega 3.
- Fruit and vegetables, for their high vitamin, mineral and antioxidant content.
- Green tea and coffee, as caffeine in moderate doses supports focus.
Tips for Enhancing Cognitive Performance Through Diet
To enhance cognitive performance through nutrition, start with the basics: a balanced diet containing the nutrients mentioned above, and good hydration. Dehydration can greatly affect cognitive performance.
Building on this foundation, some compounds can offer an extra boost. These are nootropics: substances that improve cognitive functions such as memory, executive functioning and attention.
Within this group, a few substances have scientific evidence supporting their use:
- Caffeine in moderate/low doses: high doses can have the opposite effect through overstimulation.
- Theanine: this can attenuate the stimulation caused by caffeine.
- Citicoline: a precursor to acetylcholine.
- Bacopa monnieri: for its bacoside content, its active compound.
