The developing brain

Question 1

Different neuronal cells distinguished by:

Answer 1

• Action potentials’ signalling properties
• NTs they use
• Receptor molecules incorporated at post-synaptic site
• Morphology of axons and dendrites

Question 2

When does neuralation occur?

Answer 2

By 20th day

Question 3

What develops first, the parietotemporal regions, sensorimotor cortex or PFC?

Answer 3

Sensorimotor regions

Question 4

When is the neural tube formed?`

Answer 4

3-4 weeks

Question 5

Morris Water Maze experiment

Answer 5

Rats in an enriched environment did better on a task to find a hidden platform. PMs revealed higher synapse density in areas associated with spatial awareness eg: hpc.

Question 6

Hippocampus not fully developed under how many years?

Answer 6

> 5 years

Question 7

fMRI studies show that brain activity becomes (more/less) diffuse with age

Answer 7

less diffuse and more localised

Question 8

At what age can infants detect contours in Kanizsa squares by?

Answer 8

7 months.

Question 9

At age 3 what would you expect children to be able to do?

a) sort objects according to one rule (eg: colour)
b) sort objects according to two rules (eg: shape and colour)
c) switch between two different rules when sorting (eg: shape then colour)

Answer 9

b) sort objects according to two rules. At 5 they can switch between rules. Young children persevere with the first rule.

Question 10

9 month old infants need a ratio of what to determine difference in numbers (either visually or verbally)?

a) 1:4 ratio
b) 1:2 ratio
c) 3:4 ratio
d) 2:3 ratio

Answer 10

d) 2:3 ratio.

6 month olds need a ratio of 1:2