New study by scientists: We realized how little we know

A new study has been conducted by the Jonas Group at the Institute of Science and Technology Austria (ISTA) in collaboration with neurosurgeons from the Medical University of Vienna. The research presents significant new findings on how human memory is stored and retrieved. The study focuses specifically on understanding the unique characteristics of the human hippocampus.

The hippocampus, the center of memory and learning, plays a critical role in information processing and pattern completion processes. However, the human brain is not simply a scaled-up version of a mouse brain.

Jonas and his team revealed these differences using tissues obtained from patients who underwent surgery to remove a portion of the hippocampus for epilepsy treatment.

During such surgeries, obtaining healthy hippocampal tissue is a rare opportunity. By applying advanced experimental techniques to 17 healthy tissue samples taken from epilepsy patients, the team discovered that the connections in the human CA3 region are sparser, but its synapses are more reliable and precise.

Animal models are of great importance in brain research. However, this research on the human hippocampus highlights differences unique to the human brain.

Jake Watson from ISTA says, "When working with mice, I thought everything about the hippocampus was already known. But when I examined the first human samples, we realized how little we knew about the physics, cellular organization, and connections of the human hippocampus."

By modeling the computational capacity of the human CA3 network, the researchers showed how these unique connections are more efficient in the storage and retrieval of memory.

"With this model, we proved that the human neural network offers a higher memory capacity," says Jonas, drawing attention to the superiority of the human brain in information encoding.

The rarity of obtaining living human tissue creates logistical challenges. The research team may have to suddenly stop their other projects to work on tissues arriving from surgeries.

Jake Watson from ISTA says, "It was quite an extraordinary experience to examine the tissue of a patient who was operated on one morning, while knowing that the patient was recovering in the hospital at the same time."

This study shows that scientists and healthcare professionals need to re-evaluate the human brain.

Jonas emphasizes the importance of collaboration in this field, stating, "Every study to be conducted on the human brain will help us better understand this complex organ."

The research is seen as a groundbreaking step in understanding the connections and functions unique to the human brain, moving beyond studies based on animal models.