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  2. Neurobiological effects of physical exercise - Wikipedia

    en.wikipedia.org/wiki/Neurobiological_effects_of...

    Neuroplasticity is the process by which neurons adapt to a disturbance over time, and most often occurs in response to repeated exposure to stimuli. [27] Aerobic exercise increases the production of neurotrophic factors [note 1] (e.g., BDNF, IGF-1, VEGF) which mediate improvements in cognitive functions and various forms of memory by promoting blood vessel formation in the brain, adult ...

  3. Visual system - Wikipedia

    en.wikipedia.org/wiki/Visual_system

    The visual system is the physiological basis of visual perception (the ability to detect and process light).The system detects, transduces and interprets information concerning light within the visible range to construct an image and build a mental model of the surrounding environment.

  4. Role of serotonin in visual orientation processing - Wikipedia

    en.wikipedia.org/wiki/Role_of_serotonin_in...

    MDMA is part of the amphetamine family and elicits its positive effects by altering brain serotonin, dopamine and norepinephrine neurotransmitter levels. [2] [6] [13] [14] As the drug begins to take effect, the brain becomes flooded with serotonin which can then become depleted within 3–6 hours following consumption. [14]

  5. Sense of balance - Wikipedia

    en.wikipedia.org/wiki/Sense_of_balance

    It can also be temporarily disturbed by quick or prolonged acceleration, for example, riding on a merry-go-round. Blows can also affect equilibrioreception, especially those to the side of the head or directly to the ear. Most astronauts find that their sense of balance is impaired when in orbit because they are in a constant state of ...

  6. Visual processing - Wikipedia

    en.wikipedia.org/wiki/Visual_processing

    The visual system is organized hierarchically, with anatomical areas that have specialized functions in visual processing. Low-level visual processing is concerned with determining different types of contrast among images projected onto the retina whereas high-level visual processing refers to the cognitive processes that integrate information from a variety of sources into the visual ...

  7. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    Any pathological process in the visual system, even in older humans beyond the critical period, will often cause decreases in visual acuity. Thus measuring visual acuity is a simple test in accessing the health of the eyes, the visual brain, or pathway to the brain. Any relatively sudden decrease in visual acuity is always a cause for concern.

  8. Eye - Wikipedia

    en.wikipedia.org/wiki/Eye

    Apposition eyes work by gathering a number of images, one from each eye, and combining them in the brain, with each eye typically contributing a single point of information. The typical apposition eye has a lens focusing light from one direction on the rhabdom, while light from other directions is absorbed by the dark wall of the ommatidium .

  9. Optics and vision - Wikipedia

    en.wikipedia.org/wiki/Optics_and_vision

    The human eye is an organ which reacts to light for several purposes. As a conscious sense organ, the eye allows vision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth. The human eye can distinguish about 10 million colors. [3]