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Temporal Frequency of Whisker Movement. II. Laminar Organization of Cortical Representations
 

Summary: Temporal Frequency of Whisker Movement. II. Laminar
Organization of Cortical Representations
EHUD AHISSAR, RONEN SOSNIK, KNARIK BAGDASARIAN, AND SEBASTIAN HAIDARLIU
Department of Neurobiology, The Weizmann Institute of Science, Rehovot 76100, Israel
Received 13 October 2000; accepted in final form 9 February 2001
Ahissar, Ehud, Ronen Sosnik, Knarik Bagdasarian, and Sebastian
Haidarliu. Temporal frequency of whisker movement. II. Laminar
organization of cortical representations. J Neurophysiol 86: 354367,
2001. Part of the information obtained by rodent whiskers is carried
by the frequency of their movement. In the thalamus of anesthetized
rats, the whisker frequency is represented by two different coding
schemes: by amplitude and spike count (i.e., response amplitudes and
spike counts decrease as a function of frequency) in the lemniscal
thalamus and by latency and spike count (latencies increase and spike
counts decrease as a function of frequency) in the paralemniscal
thalamus (see accompanying paper). Here we investigated neuronal
representations of the whisker frequency in the primary somatosen-
sory ("barrel") cortex of the anesthetized rat, which receives its input
from both the lemniscal and paralemniscal thalamic nuclei. Single and
multi-units were recorded from layers 2/3, 4 (barrels only), 5a, and 5b

  

Source: Ahissar, Ehud - Department of Neurobiology, Weizmann Institute of Science

 

Collections: Biology and Medicine