نتایج جستجو برای: midbrain

تعداد نتایج: 13345  

Journal: :Journal of Neurosciences in Rural Practice 2012

Journal: :Scholarpedia 2011

2004
Ron Dabby Nathan Watemberg Yair Lampl Anda Eilam Abraham Rapaport Menachem Sadeh

Pathological laughter is an uncommon symptom usually caused by bilateral, diffuse cerebral lesions. It has rarely been reported in association with isolated cerebral lesions. Midbrain involvement causing pathological laughter is extremely unusual. We describe three patients who developed pathological laughter after midbrain and pontine-midbrain infarction. In two patients a small infarction in ...

2013
Robert L. Barry Mariam Coaster Baxter P. Rogers Allen T. Newton Jay Moore Adam W. Anderson David H. Zald John C. Gore

Functional Magnetic Resonance Imaging (fMRI) in the midbrain at 7 Tesla suffers from unexpectedly low temporal signal to noise ratio (TSNR) compared to other brain regions. Various methodologies were used in this study to quantitatively identify causes of the noise and signal differences in midbrain fMRI data. The influence of physiological noise sources was examined using RETROICOR, phase regr...

Journal: :NeuroImage 2021

Navigating the physical world requires learning probabilistic associations between sensory events and their change in time (volatility). Bayesian accounts of this process rest on hierarchical prediction errors (PEs) that are weighted by estimates uncertainty (or its inverse, precision). In a previous fMRI study we found low-level precision-weighted PEs about visual outcomes (that update beliefs...

2011
Aiko Osawa Shinichiro Maeshima Masanori Suzuki Shinya Kohyama Fumitaka Yamane Shoichiro Ishihara

We report a patient with unilateral midbrain hemorrhage which caused ipsilateral complete oculomotor nerve palsy with pupillary involvement, contralateral upgaze paresis, contralateral limb ataxia and Parinaud’s syndrome. CT scan and MRI brain demonstrated a hemorrhage in the left paramedian midbrain probably involving the oculomotor fascicles; extension of the hemorrhage to the most rostral mi...

Journal: :Brain disorders 2021

• Midbrain dopaminergic neuron transcription factors modulate the long-term survival and maintenance of these neurons. Understanding developmental pathways might lead to a better insight into their degeneration in Parkinson's disease. Phylogenetic profiling was used identify molecular interactions correlated with factors. Two distinct evolutionary pathways, pertaining early late novel links wer...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2002
Timothy A Sanders Andrew Lumsden Clifton W Ragsdale

In spinal cord and hindbrain development, neurons are generated as longitudinal cell columns aligned with the ventral and dorsal midlines. For rostral brain, however, the fundamental structure of early neuronal patterning remains poorly understood. We report here that, in the chick embryo, the ventral midbrain is remarkably regular in its cellular and molecular organization; it is arranged as a...

Journal: :Journal of visualized experiments : JoVE 2015
Doris Tomas Augustinus H Prijanto Emma L Burrows Anthony J Hannan Malcolm K Horne Tim D Aumann

Long-lasting changes in the brain or 'brain plasticity' underlie adaptive behavior and brain repair following disease or injury. Furthermore, interactions with our environment can induce brain plasticity. Increasingly, research is trying to identify which environments stimulate brain plasticity beneficial for treating brain and behavioral disorders. Two environmental manipulations are described...

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