Colour centre
Encyclopedia
The colour centre is a region in the brain
responsible for processing the light signals received by the eye into what humans and animals perceive as colour vision. It consists of two subdivisions, an anterior one, called V4α and a posterior one, called V4. The structural organization of the colour centre on the surface of the human brain can be analysed using an MRI
scanner.
to the visual cortex
for the brain to interpret. The electrical activity produced is shown as an area of the brain undergoing stimulation fron the signals produced by the eye. These areas monitored by the MRI scanner can the be digitally recorded and further examined using sophisticated computers to aid scientists with their research.
Brain
The brain is the center of the nervous system in all vertebrate and most invertebrate animals—only a few primitive invertebrates such as sponges, jellyfish, sea squirts and starfishes do not have one. It is located in the head, usually close to primary sensory apparatus such as vision, hearing,...
responsible for processing the light signals received by the eye into what humans and animals perceive as colour vision. It consists of two subdivisions, an anterior one, called V4α and a posterior one, called V4. The structural organization of the colour centre on the surface of the human brain can be analysed using an MRI
Functional magnetic resonance imaging
Functional magnetic resonance imaging or functional MRI is a type of specialized MRI scan used to measure the hemodynamic response related to neural activity in the brain or spinal cord of humans or other animals. It is one of the most recently developed forms of neuroimaging...
scanner.
Procedure
When exposing a human subject to colour images manipulated by various lighting arrangements the subjects eye responds to the variations in light frequency and intensity. It produces electrical impulses which are conducted by the optical nerveNerve
A peripheral nerve, or simply nerve, is an enclosed, cable-like bundle of peripheral axons . A nerve provides a common pathway for the electrochemical nerve impulses that are transmitted along each of the axons. Nerves are found only in the peripheral nervous system...
to the visual cortex
Visual cortex
The visual cortex of the brain is the part of the cerebral cortex responsible for processing visual information. It is located in the occipital lobe, in the back of the brain....
for the brain to interpret. The electrical activity produced is shown as an area of the brain undergoing stimulation fron the signals produced by the eye. These areas monitored by the MRI scanner can the be digitally recorded and further examined using sophisticated computers to aid scientists with their research.