CNS: Developmental experience and brain function

Question 1

Why do different brain areas control different types of functioning?

Answer 1

This is at least in part due to the type of input that part of the brain receives from the neurons connected to it.

Question 2

If part of animal brain is removed before neurons connect with the cortex….

Answer 2

All usual functional areas still are represented and “squeezed” into the remaining cortex

Question 3

Experience also affects how brain functioning develops, as evidenced by:

Answer 3

• amputation – cortex eventually processes input from adjacent body areas
• musicians – larger cortical area processes sensory input from L hand
• blind people who read Braille – larger area of brain activated when touching something with fingers
• language development in children