An Executive Function of the Hippocampus Pathway Selection for Thalamic Neuronal Significance Code

Gabriel, Michael; Sparenborg, Steven; Stolar, Neal

doi:10.1007/978-1-4615-8024-9_1

Cited by 37 publications

(34 citation statements)

References 50 publications

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“…=: 80 CA1 6 60 results are consistent with the result ofa previous study (Sakurai, 1990a) that showed CA 1 and CA3 involvement in comparisons for WM, and are supported by several other studies (Gabriel et al, 1986;Gray and Rawlins, 1986;Eichenbaum et al, 1987;Foster et al, 1987;Otto and Eichenbaum, 1992).…”

Section: Iqsupporting

confidence: 88%

“…The hippocampal units with the same motor correlates in both of the memory tasks might therefore reflect simple motor functions independent of memory tasks. However, hippocampal involvement not in simple but in higher and mnemonic motor functions has been shown previously (i.e., Gabriel et al, 1986;Foster et al, 1989). It is consequently difficult to consider these hippocampal regions as simply a part of a primary motor system.…”

Section: Unique Functions Of the Hippocampal Regionsmentioning

confidence: 93%

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Involvement of auditory cortical and hippocampal neurons in auditory working memory and reference memory in the rat

Sakurai

1994

J. Neurosci.

122

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The goal of the present study was to see whether one neuron is involved exclusively in one type of memory or in different types of memory. Single-unit activity was recorded from rat hippocampal CAl, CA3, dentate gyrus, and auditory cortex (AC) during performances of auditory working memory (WM) and reference memory (RM) tasks. Both the memory tasks employed identical apparatus and stimuli and differed only in the type of memory required for correct performance.Around 10% and 43% of the units from the four brain regions showed sensory correlates (differences in activity due to the type of sensory stimulus) only in the WM or RM task, respectively.Only the AC had units showing different kinds of sensory correlates between the WM and RM tasks. About 30% of the units from the four regions had sensoryretention correlates (sustained differential activity during the delay) only in the RM task, whereas the AC had units with sensory-retention correlates only in the WM task or in both the WM and RM tasks. Approximately 35% of the units from the hippocampal regions showed motor correlates (increments of activity immediately prior to responses) only in the WM task. Another 30% of the hippocampal units showed such correlates both in the WM and RM tasks. About 22% of the hippocampal CA1 and CA3 units showed comparisonmotor correlates (increases of activity prior to correct responses) only in the WM task.These results indicate that some neurons are involved solely in WM or RM, whereas other neurons are involved in both WM and RM. The results also suggest that more neurons are involved in sensory and retention processing for RM than for WM, and that the AC alone has flexible neurons involved in the processes for both types of memory. More hippocampal neurons are involved in the motor and comparison processes for WM than for RM.

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Section: Iqsupporting

confidence: 88%

Section: Unique Functions Of the Hippocampal Regionsmentioning

confidence: 93%

Involvement of auditory cortical and hippocampal neurons in auditory working memory and reference memory in the rat

Sakurai

1994

J. Neurosci.

122

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“…Experimental damage to subicular and cingulate cortical neurons that project to limbic thalamus did not attenuate but rather enhanced the limbic thalamic training-induced activity (Gabriel et al, 1986(Gabriel et al, , 1987. Lesions of the limbic thalamic nuclei abolished training-induced activity and virtually all tone-elicited activity in cingulate cortex (Gabriel et al, 1989).…”

mentioning

confidence: 86%

Mamillothalamic tract transection blocks anterior thalamic training- induced neuronal plasticity and impairs discriminative offidance behavior in rabbits

et al. 1995

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Rabbits with bilateral transecting lesions of the mamillothalamic tract, control (tract-sparing and sham) lesions, or no lesions, and chronic, fixed-position anterior ventral (AV) and medial dorsal (MD) thalamic and posterodorsal subicular complex unit recording electrodes were trained to step in an activity wheel in response to a 0.5 sec tone (CS+) in order to avoid a brief foot shock. The rabbits also learned to ignore a different tone (CS-) not predictive of shock. Behavioral acquisition was significantly retarded in rabbits with mamillothalamic tract transection compared to controls. When trained, transected rabbits failed to avoid the shock more often than controls. Mamillothalamic tract transection abolished and control lesions attenuated AV thalamic discriminative training-induced activity (i.e., development with training of greater discharges in response to the CS+ than to the CS-). Transection and control lesions attenuated AV thalamic excitatory training-induced activity (greater elicited activity during training than during unpaired tone-shock presentations before training) as well as AV thalamic “spontaneous” baseline unit activity. CS-elicited discharge magnitude was reduced by control lesions and it was further reduced by tract transecting lesions. Significant lesion-related changes were not found in the subicular or MD thalamic neuronal receptor. Mamillothalamic tract afferent information flow is thus essential for AV thalamic discriminative training-induced activity, excitatory training-induced activity, tone- elicited discharges and maintenance of conditioned avoidance responses. The effects of the control lesions suggested that afferents which course in parallel with and near the mamillothalamic tract may contribute to AV thalamic spontaneous activity and excitatory training- induced activity.

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“…The second type is often referred to as ''frontal midline theta'' (Fm theta) because of its typical scalp topography. Fm theta has been observed during a large variety of tasks (for overviews, see Inanaga, 1998;Schacter, 1977) such as mental calculation (e.g., Asada, Fukuda, Tsunoda, Yamaguchi, & Tonoike, 1999;Sasaki, Tsujimoto, Nambu, Matsuzaki, & Kyuhou, 1994), working memory and learning (e.g., Gabriel, Sparenborg, & Stolar, 1986;Gevins, Smith, McEvoy, & Yu, 1997;Jensen & Tesche, 2002;Klimesch, Schack, & Sauseng, 2005;McEvoy, Pellouchoud, Smith, & Gevins, 2001;Onton, Delorme, & Makeig, 2005), error processing (Luu & Tucker, 2001;Luu, Tucker, Derryberry, Reed, & Poulsen, 2003;Luu, Tucker, & Makeig, 2004), and meditation (e.g., Aftanas & Golocheikine, 2001;Kubota et al, 2001). Therefore, Fm theta has been most often interpreted as a correlate of heightened mental effort and sustained attention required during a multitude of operations.…”

Section: Theta (4-8 Hz)mentioning

confidence: 99%

Music and emotion: Electrophysiological correlates of the processing of pleasant and unpleasant music

et al. 2007

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Human emotion and its electrophysiological correlates are still poorly understood. The present study examined whether the valence of perceived emotions would differentially influence EEG power spectra and heart rate (HR). Pleasant and unpleasant emotions were induced by consonant and dissonant music. Unpleasant (compared to pleasant) music evoked a significant decrease of HR, replicating the pattern of HR responses previously described for the processing of emotional pictures, sounds, and films. In the EEG, pleasant (contrasted to unpleasant) music was associated with an increase of frontal midline (Fm) theta power. This effect is taken to reflect emotional processing in close interaction with attentional functions. These findings show that Fm theta is modulated by emotion more strongly than previously believed.

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An Executive Function of the Hippocampus Pathway Selection for Thalamic Neuronal Significance Code

Cited by 37 publications

References 50 publications

Involvement of auditory cortical and hippocampal neurons in auditory working memory and reference memory in the rat

Involvement of auditory cortical and hippocampal neurons in auditory working memory and reference memory in the rat

Mamillothalamic tract transection blocks anterior thalamic training- induced neuronal plasticity and impairs discriminative offidance behavior in rabbits

Music and emotion: Electrophysiological correlates of the processing of pleasant and unpleasant music

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