Mapping Neural Connections and Their Development II

on YouTube ↗01h 12m

" summary

Claimed ability to map every wire in a volume using an automatic tape‑collecting ultramicrotome plus a 61‑beam multisem SEM that generates ~11 TB/day. Pipeline slices 30 nm sections, stains membranes, images, aligns and segments; a cubic millimeter becomes ~2 PB of data (cubic millimeter = ~2 PB, ~40,000 neurons, ~1 billion synapses). Early results: axons often make multiple synapses onto the same dendrite, axon cohorts “hop” between nearby dendrites, astrocytes/ microglia show unexpected contacts, and one apical dendrite even contains a capillary.

AI-written summary · about

" chapters (12)

1. 0:00Brain development and wiring
2. 2:20Biological models of wiring
3. 6:38Connectomics pipeline
4. 10:28Imaging challenges
5. 14:24Multi-beam electron microscopy
6. 20:59Large-scale data visualization
7. 25:58Cortex structure and scale
8. 33:24Selectivity in connectivity
9. 37:31Limits of understanding
10. 41:45Microglia and observations
11. 43:12Thalamus circuit analysis
12. 56:00Complexity and the future