Subdivisions of the auditory cortex of the cat: The retrograde transport of horseradish peroxidase to the medial geniculate body and posterior thalamic nuclei

1977 ◽  
Vol 176 (3) ◽  
pp. 387-417 ◽  
Author(s):  
Jeffery A. Winer ◽  
I. T. Diamond ◽  
Denis Raczkowski
Keyword(s):  
Horseradish Peroxidase ◽  
Auditory Cortex ◽  
Medial Geniculate Body ◽  
Retrograde Transport ◽  
Thalamic Nuclei ◽  
Medial Geniculate

A neural model of medial geniculate body and auditory cortex detecting target distance independently of target velocity in echolocation

2000 ◽  
Vol 32-33 ◽  
pp. 833-841 ◽  
Author(s):  
Satoru Inoue ◽  
Manabu Kimyou ◽  
Yoshiki Kashimori ◽  
Osamu Hoshino ◽  
Takeshi Kambara
Keyword(s):  
Auditory Cortex ◽  
Medial Geniculate Body ◽  
Neural Model ◽  
Target Distance ◽  
Target Velocity ◽  
Medial Geniculate

Dual compartments of the ventral division of the medial geniculate body projecting to the core region of the auditory cortex in C57BL/6 mice

2013 ◽  
Vol 76 (4) ◽  
pp. 207-212 ◽  
Author(s):  
Masao Horie ◽  
Hiroaki Tsukano ◽  
Ryuichi Hishida ◽  
Hirohide Takebayashi ◽  
Katsuei Shibuki
Keyword(s):  
Auditory Cortex ◽  
Medial Geniculate Body ◽  
Core Region ◽  
The Core ◽  
Medial Geniculate

Cortical and Collicular Inputs to Cells in the Rat Paralaminar Thalamic Nuclei Adjacent to the Medial Geniculate Body

2007 ◽  
Vol 98 (2) ◽  
pp. 681-695 ◽  
Author(s):  
Philip H. Smith ◽  
Edward L. Bartlett ◽  
Anna Kowalkowski
Keyword(s):  
Conditioned Fear ◽  
Medial Geniculate Body ◽  
Cortical Layer ◽  
Axon Collateral ◽  
Thalamic Nuclei ◽  
Paired Pulse ◽  
Cortical Input ◽  
Spike Number ◽  
Medial Geniculate ◽  
Cortical Inputs

The paralaminar nuclei, including the medial division of the medial geniculate nucleus, surround the auditory thalamus medially and ventrally. This multimodal area receives convergent inputs from auditory, visual, and somatosensory structures and sends divergent outputs to cortical layer 1, amygdala, basal ganglia, and elsewhere. Studies implicate this region in the modulation of cortical 40-Hz oscillations, cortical information binding, and the conditioned fear response. We recently showed that the basic anatomy and intrinsic physiology of paralaminar cells are unlike that of neurons elsewhere in sensory thalamus. Here we evaluate the synaptic inputs to paralaminar cells from the inferior and superior colliculi and the cortex. Combined physiological and anatomical evidence indicates that paralaminar cells receive both excitatory and inhibitory inputs from both colliculi and excitatory cortical inputs. Excitatory inputs from all three sources typically generate small summating EPSPs composed of AMPA and NMDA components and terminate primarily on smaller dendrites and occasionally on dendritic spines. The cortical input shows strong paired-pulse facilitation (PPF), whereas both collicular inputs show weak PPF or paired-pulse depression (PPD). EPSPs of cells with no low-threshold calcium conductance do not evoke a burst response when the cell is hyperpolarized. Longer-latency EPSPs were seen and our evidence indicates that these arise from axon collateral inputs of other synaptically activated paralaminar cells. The inhibitory collicular inputs are GABAergic, activate GABAA receptors, and terminate on dendrites. Their activation can greatly alter EPSP-generated spike number and timing.

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