Human Growth and Development / Unit 15 HGD 2116 short lesson, about 20 seconds
Brain Volume and White Matter
Captions available
The idea
After forty, brain volume falls about five percent per decade, probably from shrinking neurons and fewer synapses rather than cell death.
In practice
White matter, the myelinated connections between regions, deteriorating after forty and accounting for late-life slowing.
Where people slip
Hippocampal changes accompany age-related memory decline, and neuroplasticity generally declines with age.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
Something wrong in this lesson? Flag it · Sources for Human Growth and Development