Projections from orbitofrontal cortex to mediodorsal thalamic nucleus in the dog

1977 ◽  
Vol 131 (2) ◽  
pp. 356-361 ◽  
Author(s):  
Duke Tanaka
Keyword(s):  
Orbitofrontal Cortex ◽  
Thalamic Nucleus ◽  
Mediodorsal Thalamic Nucleus

The role of the mediodorsal thalamic nucleus in human olfaction

Neurocase ◽  
2011 ◽  
Vol 17 (2) ◽  
pp. 148-159 ◽  
Author(s):  
Wendy W. P. Tham ◽  
Richard J. Stevenson ◽  
Laurie A. Miller
Keyword(s):  
Thalamic Nucleus ◽  
Mediodorsal Thalamic Nucleus ◽  
Human Olfaction

Electrical responses to limbic and thalamic stimulation in the unrestrained hooded rat

1962 ◽  
Vol 203 (5) ◽  
pp. 796-798
Author(s):  
Lucy Birzis
Keyword(s):  
Limbic System ◽  
Thalamic Nucleus ◽  
Low Voltage ◽  
Electrical Response ◽  
Active Growth ◽  
Thalamic Stimulation ◽  
Fast Activity ◽  
Mediodorsal Thalamic Nucleus ◽  
Slow Activity ◽  
Stimulation Of

A procedure for implanting cortical and subcortical brain electrodes in young hooded rats is described. In unrestrained rats, cortical activity showed patterns of high voltage slow activity or low voltage fast activity correlated with quiet or alert states, respectively. Typical recruiting responses were elicited by stimulation of the mediodorsal thalamic nucleus. Low intensity stimulation of the limbic system produced an electrical response similar to thalamocortical recruiting, and higher intensity stimulation induced a seizure discharge in the limbic circuit with accompanying behavioral signs of excitement and hypermotility. Neither ongoing electrical activity, nor thresholds or amplitudes of response to stimulation of thalamus or limbic system were observably different after a period of 8 weeks of active growth of the rats.

Effect of mediodorsal thalamic nucleus lesion on contextual fear conditioning in rats

2004 ◽  
Vol 1008 (2) ◽  
pp. 261-272 ◽  
Author(s):  
Xiao Bai Li ◽  
Takeshi Inoue ◽  
Shin Nakagawa ◽  
Tsukasa Koyama
Keyword(s):  
Fear Conditioning ◽  
Thalamic Nucleus ◽  
Contextual Fear Conditioning ◽  
Contextual Fear ◽  
Mediodorsal Thalamic Nucleus

Comparison of Oculomotor Neuronal Activity in Paralaminar and Mediodorsal Thalamus in the Rhesus Monkey

2005 ◽  
Vol 93 (1) ◽  
pp. 614-619 ◽  
Author(s):  
Ikuo Tanibuchi ◽  
Patricia S. Goldman-Rakic
Keyword(s):  
Thalamic Nucleus ◽  
Delayed Response ◽  
Thalamic Nuclei ◽  
Related Activity ◽  
Dorsal Thalamus ◽  
Mediodorsal Thalamic Nucleus ◽  
Picture Stimuli ◽  
Fixation Task ◽  
Response Task ◽  
Lateral Nucleus

We previously reported that neurons in the mediodorsal thalamic nucleus (MD) are topographically organized and express spatial and nonspatial coding properties similar to those of the prefrontal areas with which they are connected. In the course of mapping the dorsal thalamus, we also studied neurons in a subset of thalamic nuclei (the caudal part of the ventral lateral nucleus (VLc), the oral part of the ventral posterior lateral nucleus (VPLo), the parvocellular part of the ventral anterior nucleus (VApc)) lateral to the MD and just across the internal medullary lamina. We compared these “paralaminar” neurons to MD neurons by having monkeys perform the same spatial and nonspatial cognitive tasks as those used to investigate the MD; these included two saccadic tasks—one requiring delayed and the other immediate responses—and one picture fixation task. Of the paralaminar thalamic neurons modulated by the saccadic tasks, a majority had saccade-related activity, and this was nearly always spatially tuned. Also, for about half of these neurons, the saccade-related activity occurred exclusively during the delayed-response task. No neurons with event-related activity in the saccadic tasks were preferentially modulated by specific picture stimuli, although other neurons were. All of these results were similar to what we had found for MD neurons. However, in contrast to the high proportion of presaccadic responses observed in the MD, the majority of saccade-related neurons in paralaminar thalamus exhibited mid- or postsaccadic activity, i.e., that started during or after the saccade. Our findings suggest that neurons in the paralaminar thalamus may be possible conduits of oculomotor feedback signals, especially during memory-guided saccades.

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