@cnn: For the first time, researchers have been able to study how a living brain interacts with Alzheimer’s proteins in real time -- and how parts of the brain are lost to the disease. The scientific breakthrough was made possible by tissue samples from living donors. CNN’s Isobel Yeung went inside the operating room to explain why one young man agreed to donate part of his brain. Stream the full story now on the CNN app.

rob_yn :

This is my younger brother ❤️he is amazing and we’re very proud of him. Just starting chemotherapy and radiotherapy yesterday!!!

Olivier :

Brainsurgeon gotta be the top 3 aura job

Bigbannana543 :

God is good yall

𝐋 :

I'm never donating my brain bro

ℭ𝔞𝔪𝔢𝔯𝔬𝔫 :

God is good!

jada :

the respect i have for these surgeons

Alice Boanas :

This is scary

Frictionino :

Dear God! Humanity is forever grateful

Logentoreal :

Peekay :

this is what science should be used for... not wars

HoneyBunBart :

God is amazing

Dari ⊹˚♡ :

Neurosurgery will always be fascinating

rr_562 :

These surgeons deserve the highest salary you can ever get

Ⓜ️Ⓜ️Ⓜ️ :

Neurosurgeons are such incredible people ❤️

David Goggins :

God be with you 🙏

luna :

This is amazing

RihaNa Khaن :

Ya Allah protect all Muslim🤲

Bro :

Be carefull the brain is very fragile

Maja ﾒ𝟶 :

I pray this works!!

Looby :

Speedy recovery Aiden ❤️

kamsi :

doctors are amazing 🥹