www.astralcodexten.com/p/next-token-predictor-is-an-ais-job
1 correction found
the entorhinal cells in the hippocampus
Entorhinal cells are not in the hippocampus; they are in the entorhinal cortex, a neighboring region that connects with the hippocampus.
Full reasoning
This phrase gets the anatomy wrong. Entorhinal cells are cells of the entorhinal cortex (EC), which is adjacent to and strongly connected with the hippocampus, but is not itself part of the hippocampus.
A Society for Neuroscience/BrainFacts overview says: "The entorhinal cortex sits between the hippocampus and the neocortex" and sends information to the hippocampus. A peer-reviewed eLife review similarly describes the entorhinal cortex as "the primary site of interactions between the neocortex and hippocampus" and "the gateway to the hippocampus." Those descriptions are inconsistent with locating entorhinal cells in the hippocampus.
The specific toroidal-manifold result this sentence is alluding to was reported for grid cells in the medial entorhinal cortex, not for cells inside the hippocampus. The 2022 Nature paper on toroidal topology begins: "The medial entorhinal cortex is part of a neural system for mapping the position of an individual within a physical environment." So the article is pointing to the right research area, but the anatomical location in this phrase is incorrect.
3 sources
- Navigating Through the Entorhinal Cortex
The entorhinal cortex sits between the hippocampus and the neocortex, where it sends information ... to the hippocampus.
- Functional subregions of the human entorhinal cortex
The entorhinal cortex (EC) is the primary site of interactions between the neocortex and hippocampus... Known as the gateway to the hippocampus, the entorhinal cortex relays sensory information ... to the hippocampus.
- Toroidal topology of population activity in grid cells
The medial entorhinal cortex is part of a neural system for mapping the position of an individual within a physical environment.