نتایج جستجو برای: motor neurons

تعداد نتایج: 307059  

Journal: :The Journal of experimental biology 2008
Ulrike B S Hedrich Wolfgang Stein

The regulation of motor patterns by higher-order neuronal centers ensures appropriate motor function and behavior, but only a few studies have characterized this regulation at the cellular level. Here, we address motor pattern regulation in the stomatogastric nervous system (STNS) of the crab Cancer pagurus. This easily accessible model system is an extension of the central nervous system and c...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1998
A G Estévez N Spear S M Manuel R Radi C E Henderson L Barbeito J S Beckman

Primary cultures of rat embryonic motor neurons deprived of brain-derived neurotrophic factor (BDNF) induce neuronal nitric oxide synthase (NOS) within 18 hr. Subsequently, >60% of the neurons undergo apoptosis between 18 and 24 hr after plating. Nitro-L-arginine and nitro-L-arginine methyl ester (L-NAME) prevented motor neuron death induced by trophic factor deprivation. Exogenous generation o...

2003
Douglas A. Keen Andrew J. Fuglevand

Short-term synchronization of active motor units has been attributed in part to lastorder divergent projections that provide common synaptic input across motor neurons. The extent of synchrony thus allows insight as to how the inputs to motor neurons are distributed. Our particular interest relates to the organization of extrinsic finger muscles that give rise distally to multiple tendons, whic...

Journal: :Cell 1998
Kamal Sharma Hui Z Sheng Karen Lettieri Hung Li Alexander Karavanov Steven Potter Heiner Westphal Samuel L Pfaff

The circuits that control movement are comprised of discrete subtypes of motor neurons. How motor neuron subclasses develop and extend axons to their correct targets is still poorly understood. We show that LIM homeodomain factors Lhx3 and Lhx4 are expressed transiently in motor neurons whose axons emerge ventrally from the neural tube (v-MN). Motor neurons develop in embryos deficient in both ...

2013
Ana C. Calvo Pilar Zaragoza Rosario Osta

In particular, ALS belongs to the group of motor neuron diseases, involving the loss of cortex, brainstem, and spinal cord motor neurons that result in muscle paralysis [1]. Motor neurons, which are localized in the brain, brainstem and spinal cord, behave as a crucial links between the nervous system and the voluntary muscles of the body, as they let synaptic signals travel from upper motor ne...

Journal: :Journal of neurophysiology 2004
Douglas A Keen Andrew J Fuglevand

Short-term synchronization of active motor units has been attributed in part to last-order divergent projections that provide common synaptic input across motor neurons. The extent of synchrony thus allows insight as to how the inputs to motor neurons are distributed. Our particular interest relates to the organization of extrinsic finger muscles that give rise distally to multiple tendons, whi...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2002
Matthew C Tresch Ole Kiehn

We describe here the robust synchronization of motor neurons at a millisecond time scale during locomotor activity in the neonatal rat. Action potential activity of motor neuron pairs was recorded extracellularly using tetrodes during locomotor activity in the in vitro neonatal rat spinal cord. Approximately 40% of motor neuron pairs recorded in the same spinal segment showed significant synchr...

Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease characterized by death of motor neurons leading to devastating muscle weakness and wasting and weight loss. It causes mixed picture of lower motor neuron (LMN) and upper motor neuron (UMN) dysfunction. The wide spectrums of atypical presentations can frequently lead to expensive work-up and undue delay in diagnosis o...

Journal: :Neurobiology of Disease 2018
Teresia M. Osborn Jonathan Beagan Ole Isacson

The selective vulnerability of motor neurons in amyotrophic lateral sclerosis (ALS) is evident by sparing of a few subpopulations during this fast progressing and debilitating degenerative disease. By studying the gene expression profile of resilient vs. vulnerable motor neuron populations we can gain insight in what biomolecules and pathways may contribute to the resilience and vulnerability. ...

Journal: :Neuron 2012
Martyn Goulding

Animals use a form of sensory feedback termed proprioception to monitor their body position and modify the motor programs that control movement. In this issue of Neuron, Wen et al. (2012) provide evidence that a subset of motor neurons function as proprioceptors in C. elegans, where B-type motor neurons sense body curvature to control the bending movements that drive forward locomotion.

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید