Related Experiment Videos
Alzheimer's disease-related synapse loss in the cingulate cortex
Stephen W. Scheff1, Douglas A. Price
1Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA.
Journal of Alzheimer'S Disease : JAD
|September 6, 2002
Summary
Alzheimer's disease (AD) causes synapse loss in the cingulate cortex. Both anterior and posterior cingulate areas show lamina III synaptic loss, but only the posterior region loses synapses in lamina V.
Area of Science:
- Neuroscience
- Neuropathology
- Alzheimer's Disease Research
Background:
- Synapse loss is a key neuropathology in Alzheimer's disease (AD), affecting neocortical connectivity.
- The cingulate cortex, particularly the posterior and anterior regions, is implicated in early AD, but synaptic changes are not fully understood.
Purpose of the Study:
- To investigate synaptic numbers in the anterior and posterior cingulate cortex using ultrastructural techniques.
- To compare synaptic changes in different laminae (layers) of these two distinct association cortex regions in AD.
Main Methods:
- Ultrastructural analysis was used to quantify synaptic numbers.
- The study focused on lamina III and lamina V of the anterior and posterior cingulate cortex.
Main Results:
- Both anterior and posterior cingulate cortices showed significant synapse loss in lamina III in Alzheimer's disease (AD).
- Only the posterior cingulate cortex exhibited a significant loss of synapses in lamina V.
- The anterior cingulate cortex did not show significant synaptic loss in lamina V.
Conclusions:
- Synaptic loss in the cingulate cortex is heterogeneous in Alzheimer's disease (AD).
- Differential synaptic changes in lamina V of the anterior cingulate may relate to its motor system connectivity.
- These findings highlight regional variations in neuropathology and corticocortical connectivity changes in AD.