PHGY 314 Lecture 18: PHGY314 Chacron 4 Sensory Control over place fields
8 Dec 2016
School
Department
Course
Professor
Document Summary
Oct 17, lec 2: control of place fields. Sensory control over hippocampal spatial maps and place fields (ca1) External cues, novel objects for place fields. External and internal cues affect pf and ability of rat to self-navigate. Experiment: rat is rotated in a small single-cue environment: rotate rat in a bucket slowly enough that the rat can"t sense or perceive its rotation. Input is subvestibular: when the bucket is removed, rat believes it has not moved, but the environment has, because the cue is no longer where it expected it to be, there are other ways of doing this too. Like, hide rat in a box, move the cue manually, etc. So long as the environment changes without the rat knowing. Results: place field remapped to perceived external landmark. External cue wins out over internal cues. If you rotate the rat fast enough that it can tell that it"s being rotated, the place field will not remap.
