Reader Comments
Post a new comment on this article
Post Your Discussion Comment
Please follow our guidelines for comments and review our competing interests policy. Comments that do not conform to our guidelines will be promptly removed and the user account disabled. The following must be avoided:
- Remarks that could be interpreted as allegations of misconduct
- Unsupported assertions or statements
- Inflammatory or insulting language
Thank You!
Thank you for taking the time to flag this posting; we review flagged postings on a regular basis.
closea model for latency tuning curves
Posted by tmasquelier on 19 Jun 2012 at 16:53 GMT
Congrats! This is solid evidence for latency-based coding of orientations in V1, which was scarce so far (mainly [32]).
I especially like the scheme in which the stimulus orientation is given by the preferred orientation of the first cell (or group of cells) to fire one (or n) spike(s) (Fig 7).
Contrast invariance comes for free: changing the contrast will shift the latencies (as observed experimentally in [26] but also in Albrecht, 2002 http://jn.physiology.org/...), but the relative latencies (or ranks) will be largely unaffected.
You maybe interested in the model I presented in http://dx.doi.org/10.1007...
Essentially I showed that:
1) Latency tuning curves (as in your Fig 3C) emerge naturally in a Hubel&Wiesel-like feedforward model whose connectivity is shaped by STDP.
2) Relative latencies are more reliable than absolute ones, especially when contrast is varied, or when you consider saccades (as opposed to simulus onsets).
Your data is fully consistent with this model :-)
Best,
Timothée Masquelier