Analysing neuronal correlates of the comparison of two sequentially presented sensory stimuli

Carlos D. Brody, Adrián Hernández, Antonio Zainos, Luis Lemus, Ranulfo Romo

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


In a typical sequential sensory discrimination task, subjects are required to make a decision based on comparing a sensory stimulus against the memory trace left by a previous stimulus. What is the neuronal substrate for such comparisons and the resulting decisions? This question was studied by recording neuronal responses in a variety of cortical areas of awake monkeys (Macaca mulatta), trained to carry out a vibrotactile sequential discrimination task. We describe methods to analyse responses obtained during the comparison and decision phases of the task, and describe the resulting findings from recordings in secondary somatosensory cortical area (S2). A subset of neurons in S2 become highly correlated with the monkey's decision in the task.

Original languageEnglish (US)
Pages (from-to)1843-1850
Number of pages8
JournalPhilosophical Transactions of the Royal Society B: Biological Sciences
Issue number1428
StatePublished - Dec 29 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Biochemistry, Genetics and Molecular Biology
  • General Agricultural and Biological Sciences


  • Decisions
  • Sequential discrimination
  • Somatosensory cortex


Dive into the research topics of 'Analysing neuronal correlates of the comparison of two sequentially presented sensory stimuli'. Together they form a unique fingerprint.

Cite this