Rhythmic spontaneous bursting activity, which occurs in many developing neural circuits, has been considered to be important for the refinement of neural projections but not for early pathfinding decisions. However, the precise frequency of bursting activity differentially affects the two major pathfinding decisions made by chick lumbosacral motoneurons. Moderate slowing of burst frequency was ...

The initiation, execution, and completion of complex locomotor behaviors are depending on precisely integrated neural circuitries consisting of motor pathways that activate muscles in the extremities and sensory afferents that deliver feedback to motoneurons. These projections form in tight temporal and spatial vicinities during development, yet the molecular mechanisms and cues coordinating th...

OBJECTIVE To determine the effects of dexmedetomidine on the incidence of fasciculation and myalgia, and to evaluate changes in creatine kinase levels due to succinylcholine administration. METHODS Sixty patients undergoing direct laryngoscopy were enrolled in this study carried out in the Department of Anesthesiology and Reanimation, Hacettepe University, Ankara, Turkey between January and M...

M otor neuron disease (MND) is a neurodegenerative disorder characterized by muscle atrophy, brisk reflexes, spasticity, fasciculation, and atrophy. The onset of the disease is generally insidious. The pathological process may involve the motor cortex, the spinal cord, and the brainstem. 1 Only upper or only lower motor neurons may be affected. The disease may or may not be seen with neoplasms,...

This report describes the influence of neurite fasciculation on two aspects of nerve growth from chick spinal ganglia in vitro: the inhibition of outgrowth by high concentrations of nerve growth factor (NGF) and the preferential growth of neurites toward a capillary tube containing NGF. These studies involved a comparison of cultures of single cells, cell aggregates, and intact ganglia and the ...