If one considers the distributed coding hypothesis and the local coding hypothesis of brain function, which of these statements is correct?

Question

BlackTom AI · Accepted Answer

The question asks us to evaluate how colour and motion are coded in the brain under the distributed coding hypothesis and the local coding hypothesis.
Option 1: 'The evidence suggests that motion detection is coded through a distributed network whereas colour detection is coded through a local network.' This claim assigns a distributed code to motion and a local code to colour. In neuroscience, motion perception involves populations of neurons (e.g., direction-selective cells in early visual areas and beyond) that work collectively to determine motion direction, which aligns with distributed coding. Colour perception, while it relies on specialised channels (e.g., opponent-colour channels), is also represented across many cells across the retina and cortex, not confined to a single neuron; thus this option oversimplifies colour coding as local.
Option 2: 'The evidence suggests that colour detection is coded through a distributed network whereas motion detection is coded through a local network.' This flips the traditional view, implying colour is distributed while motion is local. While colour is represented by multiple channels and distributed activity, motion is less plausibly localized to a single neuron; population coding is well-supported for motion perception. Therefore this option is also misleading.
Option 3: 'Both colour and motion in an image are detected through a local network.' This asserts a strictly local coding scheme for both features. In reality, both colour and motion rely on population activity across groups of neurons; highly localized coding is inadequate to capture the richness of these percepts, making this option incorrect.
Option 4: 'Both colour and motion in an image are detected through a distributed network.' This aligns with the widely accepted view that both properties are represented by patterns of activity across many neurons rather than by single, isolated cells. For colour, multiple colour-opponent channels contribute to a distributed representation across retina and cortex. For motion, population codes across direction-selective neurons in MT and related areas collectively signal movement. The distributed-coding perspective thus fits current understanding of how these features are processed.
In summary, the most consistent choice across the distributed vs local coding debate is that both colour and motion rely on distributed networks rather than being encoded by single, isolated neural units, making Option 4 the correct one among the given alternatives.

If one considers the distributed coding hypothesis and the local coding hypothesis of brain function, which of these statements is correct?Single choice

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