Theta rhythmic clock-like activity of single units in the mouse hippocampus

Lu Zhang, Xiaoyu Ma, Guifen Chen, Edi Barkai, Longnian Lin

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Theta rhythmic clock-like activity was observed in a small group of hippocampal CA1 neurons in freely behaving mice. These neurons were only persistently activated during theta states of waking exploration and rapid eye movement sleep, but were almost silent during the non-theta state of slow-wave sleep. Interestingly, these cells displayed a theta clock-like simple-spike firing pattern, and were capable of firing one spike per theta cycle during theta states. This is the first report of a unique class of hippocampal neurons with a clock-like firing pattern at the theta rhythm.Wespeculate that these cellsmayact as a temporal reference to participate in the theta-related temporal coding in the hippocampus. Significance Statement Theta oscillations, as the predominant rhythms in the hippocampus during waking exploration and rapid eye movement sleep, may be critical for temporal coding/decoding of neuronal information, and theta-phase precession in hippocampal place cells is one of the best demonstrations of such temporal coding. Here,weshow that a unique small class of hippocampalCA1neurons fired with a theta rhythmic clock-like firing pattern during theta states. These firing characteristics support the notion that these neurons may play a critical role in theta-related temporal coding in the hippocampus.

Original languageEnglish
Pages (from-to)4415-4420
Number of pages6
JournalJournal of Neuroscience
Volume36
Issue number16
DOIs
StatePublished - 20 Apr 2016
Externally publishedYes

Keywords

  • Clock-spiking
  • Hippocampus
  • Phase precession
  • Theta oscillations

ASJC Scopus subject areas

  • Medicine (all)

Fingerprint

Dive into the research topics of 'Theta rhythmic clock-like activity of single units in the mouse hippocampus'. Together they form a unique fingerprint.

Cite this