Some Sort Of Neurodevlopmental Lecture 08.02.23

Question 1

How many neurons do we loose a day?

Answer 1

9000 neurons a day

Question 2

What are the two types of synapses?

Answer 2

Excitatory and inhibitory

Question 3

What is contained in white matter?

Answer 3

Insulated by Scwann cells and Oligodendrocytes
Allows electrical signals to travel faster

Question 4

How do neurons arise when you are a foetus?

Answer 4

• neurons arise in the germinal matrix
• they then migrate to the cortical sub plate and wait
• while we are a foetus some of these neurons will be myelinating

Question 5

How heavy is our brain and how much blood does it use?

Answer 5

1.3 kg (2.3% of body mass)
Uses 20% blood supply and oxygen
Generates 23 watts

Question 6

What are 3 reflexes that indicates normal development for a baby?

Answer 6

1. Rooting reflex (turn head and mouth in direction of stroking cheek)
2. Sucking reflex (babies will suck an object that touches the lips)
3. Grasping/palmar reflex (babies grasp objects pressed against palms)

Question 7

How does vision and hearing develop as a new born?

Answer 7

• see objects best 7-9 inches from eyes
• lack peripheral vision
• can track movement
• by three months can see most visible colours

Question 8

How does smell and taste develop as a new born?

Answer 8

• smell is well developed by birth
• facial expressions to different odours
• taste is sensitive at birth
• prefer sweet

Question 9

What does the left hemisphere of the brain control?

Answer 9

Verbal: speaking, reading, thinking, reasoning

Question 10

What does the right hemisphere of the brain control?

Answer 10

Nonverbal: spatial relationships, patterns/drawing, music, emotional expression

Question 11

Why is folic acid important for a mother when pregnant?

Answer 11

Reduces the risk of Spina Bifida

Question 12

What are three red flags for a baby Neuro development?

Answer 12

• being right or left handed before 3 years old
• no speech by 18 months
  -can’t sit unsupported by 12 months