Development and Adaptation of the Nervous System

Question 1

Pre-Natal Brain Development

Answer 1

Forebrain envelops midbrain around 6 months - wraps around basic brain structures
Gyri and sulci formed around 7 months
9 months - appearance of adult brain; more neurons hence different cellular structure

Question 2

Neural plate

Answer 2

Forms around day 21
Basis for the nervous system
Ends of neural plate (neural folds) push the ends of the plate up and together to form the neural tube

Question 3

Neural tube

Answer 3

critical to brain and spinal cord development

Ectoderm (skin, neural tissues), mesoderm (muscle, bone), endoderm (cells lining digestive & respiratory tract)