Unit quiz: Cortical organisation, development and neuromodulation

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5 questions · 80% to pass · no timer. This quiz checks the lessons in this unit. These authored questions assess recognition and application of the taught distinctions, not professional qualification. You may review the lessons and retry. Repeat attempts reuse the question bank; a remembered answer is not proof of transfer to a new situation.

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Question 1

A laboratory reports that the cortical territory devoted to the hand is much larger than that devoted to the back, and concludes that the cortex therefore contains a map of the body surface. Which further result is required before the word map is doing any work?Evidence that neighbouring body sites project to neighbouring cortical sites, with the sampling resolution and threshold stated.Evidence that the hand representation contains more neurons than the back representation, since map size is a count of cells.

Question 2

An intervention is given at age 5 and at age 14. The younger group improves more, and the authors conclude that the intervention works only before age 6. What would make the stronger wording defensible?Nothing further, since a difference in effect size between two ages establishes that the window has closed.Matched dose, matched measurement and demonstrated absence of an effect later, which is what separates a critical period from a gradual sensitive period decline.

Question 3

When dopamine transmission is interfered with, animals press less for a preferred food but still consume it readily when it is freely available. Which reading fits this pattern?A role in the behavioural activation and effort required to obtain an outcome, not in the value of the outcome itself.A role in hedonic pleasure, since the reduction in pressing shows that the food stopped being enjoyable.

Question 4

Students tested during examination week show higher cortisol and worse memory test performance than during a control week. What is the minimum additional information needed before calling this an effect of stress hormones on memory?Nothing, provided the cortisol difference is statistically significant and the sample is large.Whether testing coincided with retrieval or consolidation, the duration and amplitude profile of the cortisol elevation, and whether sleep or practice changed in parallel.

Question 5

A sleep protocol records only the last four hours of an eight-hour night and reports that slow-wave measures do not track overnight learning. What is the main design problem?Slow-wave activity is concentrated in the first part of the night, so the sampled window substantially misses the measure the hypothesis concerns.Slow-wave activity is confined to the first hour, so no recording after the first hour can detect it at all.

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