Your Stone Age Brain in the Screen Age

Vocabulary flashcards covering Dr. Richard Cytowic's lecture on evolutionary neuroscience, screen distractions, sleep hygiene, and attention management.

Tyranny of attention

A state of sensory and cognitive overwhelm caused by demands on attention coming from multiple directions, exceeding human mental bandwidth.

Evolution by accretion

The evolutionary process where the brain retains an existing, workable solution and layers new features on top of it, analogous to a New England add-on house.

Working memory

The brain's limited mental scratchpad used to temporarily hold whatever information is being actively focused on at a given moment.

ATP (Adenine triphosphate)

The biochemical fuel and bedrock of energy transformation that powers every cell in the body, including neural activity.

Change detector

A functional description of the brain and peripheral nervous system, which evolved to automatically detect and respond to novelty in the surrounding environment.

Forced viewing

Involuntary exposure to public screens (such as in airport lounges or waiting rooms) that forces visual attention and consumes mental energy to ignore.

Wanting and reward system

A widely diffused brain pleasure circuit that is very easy to trigger and impossible to satiate, forming the neurological basis of the hedonistic treadmill.

Hedonistic treadmill

The cycle in which achieving a desired reward immediately prompts the desire for something else due to the short-lived nature of pleasure.

Opioid system (Pleasure and liking)

A localized pleasure circuit in the brain that is harder to trigger than the wanting system, capable of satiation, and linked to addiction pathways.

Positive, intermittent reinforcement

A conditioning mechanism where rewards are delivered on an unpredictable, infrequent schedule, exploited by slot machines and social media scrolling to foster addictive behaviors.

Nomophobia

The irrational fear or anxiety of being separated from or without one's mobile phone.

Blue-yellow tritanopia filter

An accessibility color display setting on devices such as the iPhone recommended to reduce the bombardment of light photons reaching the retina.

Blue light

Short-wavelength light that carries high photon energy, penetrates deep to the back of the eye, and historically regulated circadian rhythms of waking and sleeping.

Slow-wave sleep (Stage 4 sleep)

The deepest phase of non-REM sleep where critical physiological repair, memory consolidation, and metabolic waste clearance occur.

Oxytocin

A neurochemical binding hormone released during meaningful in-person human interactions that does not get triggered through screen-based interactions.

Zoom fatigue

Mental exhaustion stemming from video calls due to unnatural camera placement, hyper-awareness of personal appearance, and fragmented audio/video streams disrupting speech timing.

Niksen

A Dutch concept meaning 'the art of doing nothing,' involving deliberate pauses (such as looking out a window or observing nature) to halt mental busyness and reset attention.

Silence (as an essential nutrient)

Periods of auditory downtime free from stimulation that the brain requires to recover and restore itself, reflecting humanity's quiet ancestral evolutionary conditions.