spinal cord

Question 1

development of neural tube

Answer 1

ectoderm thickens up and folds upon itself along dorsal midline forming neural plate

neural plate forms groove in middle and will fold upon itself hollow tube called neural tube

neurulation = neural tube closure

hinge points: dorsal portion spinal cord, brain, posterior neuropore

Question 2

neural tube layers

Answer 2

ventricular layer: inner lauer, undifferentiated proliferating cells

mantle layer: middle, differentiating neurons that will form grey matter

marginal layer: outer layer, nerve fibres that will form white matter

Question 3

sensory vs motor spatial restriction

Answer 3

alar plate (dorsal) - future sensory area

basal plate (ventral) - future motor area