Head-direction cells in the rat posterior cortex (original) (raw)

Abstract

We examined the behavioral modulation of head-directional information processing in neurons of the rat posterior cortices, including the medial prestriate (area Oc2M) and retrosplenial cortex (areas RSA and RSG). Single neurons were recorded in freely moving rats which were trained to perform a spatial working memory task on a radial-arm maze in a cue-controlled room. A dual-light-emitting diode (dual-LED) recording headstage, mounted on the animals' heads, was used to track head position and orientation. Planar modes of motion, such as turns, straight motion, and nonlocomotive states, were categorized using an objective scheme based upon the differential contributions of movement parameters, including linear and angular velocity of the head. Of 662 neurons recorded from the posterior cortices, 41 head-direction (HD) cells were identified based on the criterion of maintained directional bias in the absence of visual cues or in the dark. HD cells constituted 7 of 257 (2.7%) cells recorded in Oc2M, 26 of 311 (8.4%) cells in RSA, and 8 of 94 (8.5%) cells in RSG. Spatial tuning of HD cell firing was modulated by the animal's behaviors in some neurons. The behavioral modulation occurred either at the preferred direction or at all directions. Moreover, the behavioral selectivity was more robust for turns than straight motions, suggesting that the angular movements may significantly contribute to the head-directional processing. These behaviorally selective HD cells were observed most frequently in Oc2M (4/7, 57%), as only 5 of 26 (19%) of RSA cells and none of the RSG cells showed behavioral modulation. These data, taken together with the anatomical evidence for a cascade of projections from Oc2M to RSA and thence to RSG, suggest that there may be a simple association between movement and head-directionality that serves to transform the egocentric movement representation in the neocortex into an allocentric directional representation in the periallocortex.

Access this article

Log in via an institution

Subscribe and save

Buy Now

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

Download references

Author information

Author notes

  1. Longtang L. Chen
    Present address: Laboratory for Neural Information, RIKEN 2-1, Hirosawa, 351-01, Saitama, Japan

Authors and Affiliations

  1. Behavioral Neuroscience Program, University of Colorado, 80309, Boulder, CO, USA
    Longtang L. Chen, Lie-Huey Lin & Edward J. Green
  2. ARL Division of Neural System, Memory and Aging, University of Arizona, 85724, Tucson, AZ, USA
    Carol A. Barnes & Bruce L. McNaughton

Authors

  1. Longtang L. Chen
  2. Lie-Huey Lin
  3. Edward J. Green
  4. Carol A. Barnes
  5. Bruce L. McNaughton

Additional information

Laboratory of Neurogenetics, NIAAA, 12501 Washington Ave, Rockville, MD 20852; USA

Department of Psychology, University of Miami, Coral Gables, FL 33146, USA

Rights and permissions

About this article

Cite this article

Chen, L.L., Lin, LH., Green, E.J. et al. Head-direction cells in the rat posterior cortex.Exp Brain Res 101, 8–23 (1994). https://doi.org/10.1007/BF00243212

Download citation

Key words