The organization of afferents to the lateral posterior nucleus in the golden hamster after different combinations of neonatal lesions

1980 ◽  
Vol 193 (2) ◽  
pp. 403-412 ◽  
Author(s):  
Barbara J. Crain ◽  
William C. Hall
Keyword(s):  
Golden Hamster ◽  
Lateral Posterior ◽  
Lateral Posterior Nucleus ◽  
Neonatal Lesions

scholarly journals Pushing behavior and hemiparesis: which is critical for functional recovery in pusher patients ? Case report

2007 ◽  
Vol 65 (2b) ◽  
pp. 536-539 ◽  
Author(s):  
Taiza E.G. Santos-Pontelli ◽  
Octávio M. Pontes-Neto ◽  
José Fernando Colafêmina ◽  
Dráulio B. de Araújo ◽  
Antônio Carlos Santos ◽  
...  
Keyword(s):  
Case Report ◽  
Barthel Index ◽  
Functional Improvement ◽  
Chronic Hypertension ◽  
Acute Hemorrhage ◽  
Lateral Posterior ◽  
History Of ◽  
Lateral Posterior Nucleus ◽  
Neuroimaging Study ◽  
The Right

We report a sequential neuroimaging study in a 48-years-old man with a history of chronic hypertension and lacunar strokes involving the ventral lateral posterior nucleus of the thalamus. The patient developed mild hemiparesis and severe contraversive pushing behavior after an acute hemorrhage affecting the right thalamus. Following standard motor physiotherapy, the pusher behavior completely resolved 3 months after the onset and, at that time, he had a Barthel Index of 85, although mild left hemiparesis was still present. This case report illustrates that pushing behavior itself may be severely incapacitating, may occur with only mild hemiparesis and affected patients may have dramatic functional improvement (Barthel Index 0 to 85) after resolution pushing behavior without recovery of hemiparesis.

Organization of projections from the superior colliculus to the thalamic lateral posterior nucleus in the rat

1983 ◽  
Vol 288 (1-2) ◽  
pp. 315-319 ◽  
Author(s):  
James F. Donnelly ◽  
Scott M. Thompson ◽  
Richard T. Robertson
Keyword(s):  
Superior Colliculus ◽  
Lateral Posterior ◽  
Lateral Posterior Nucleus

Glutamate containing neurons in the cat superior colliculus revealed by immunocytochemistry

1997 ◽  
Vol 14 (2) ◽  
pp. 387-393 ◽  
Author(s):  
Chang-Jin Jeon ◽  
Michael R. Gurski ◽  
R. Ranney Mize
Keyword(s):  
Electron Microscope ◽  
Superior Colliculus ◽  
Projection Neurons ◽  
Electron Microscope Level ◽  
Cortical Afferents ◽  
Lateral Posterior ◽  
Laminar Pattern ◽  
Lateral Posterior Nucleus ◽  
Dense Band ◽  
Cat Superior Colliculus

AbstractGlutamate is the probable neurotransmitter of both retinal and cortical afferents to the cat superior colliculus (SC). The present study shows that glutamate is also contained in many postsynaptic neurons in SC. The distribution, morphology, and ultrastructure of neurons in SC were examined using glutamate antibody immunocytochemistry. Labeled cells were widely distributed throughout, but a specific laminar pattern was evident. Relatively few cells were found in the zonal and upper superficial gray layers (SGL). A dense band of intensely labeled neurons was found within the deep superficial gray and upper optic layers. Many cells were also labeled in the deeper layers. Labeled cells had varied sizes and morphologies. Soma diameters ranged from 9–67 μm, with a mean of 22 μm. Cells with stellate, vertical fusiform, and multipolar morphologies were labeled. Cells in the deep subdivision all had morphologies and sizes typical of projection neurons. To determine if labeled cells in the dense band were also projection neurons, WGA-HRP was injected into the lateral posterior nucleus and these sections were double-labeled with the glutamate antibody. Over one-half of cells in the dense band that were labeled by HRP were also obviously labeled by antibody. At the electron-microscope level, both medium- and large-sized neurons were also labeled by glutamate antibodies. These cells had different but characteristic morphologies.

scholarly journals Processing of visually evoked innate fear by a non-canonical thalamic pathway

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Pengfei Wei ◽  
Nan Liu ◽  
Zhijian Zhang ◽  
Xuemei Liu ◽  
Yongqiang Tang ◽  
...  
Keyword(s):  
Animal Species ◽  
Full Range ◽  
Visual Stimuli ◽  
Defensive Responses ◽  
Life Threatening ◽  
Lateral Posterior ◽  
Lateral Posterior Nucleus ◽  
Defensive Behaviours ◽  
Innate Fear

Abstract The ability of animals to respond to life-threatening stimuli is essential for survival. Although vision provides one of the major sensory inputs for detecting threats across animal species, the circuitry underlying defensive responses to visual stimuli remains poorly defined. Here, we investigate the circuitry underlying innate defensive behaviours elicited by predator-like visual stimuli in mice. Our results demonstrate that neurons in the superior colliculus (SC) are essential for a variety of acute and persistent defensive responses to overhead looming stimuli. Optogenetic mapping revealed that SC projections to the lateral posterior nucleus (LP) of the thalamus, a non-canonical polymodal sensory relay, are sufficient to mimic visually evoked fear responses. In vivo electrophysiology experiments identified a di-synaptic circuit from SC through LP to the lateral amygdale (Amg), and lesions of the Amg blocked the full range of visually evoked defensive responses. Our results reveal a novel collicular–thalamic–Amg circuit important for innate defensive responses to visual threats.

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