About the Book
This book consists of articles from Wikia or other free sources online. Pages: 61. Chapters: CNS neurons, Efferent neurons, Neural receptors, Parts of a Neuron, Alpha motor neuron, Basket cell, Betz cell, Chandelier cells, Gamma motor neuron, Golgi cell, Granular cell, Granule cells, Mirror neurons, Multipolar neuron, Purkinje cells, Pyramidal cell, Renshaw cell, Spindle neuron, Stellate cell, Alpha motor neuron, Gamma motor neuron, Lower motor neuron, Motoneuron, Motor neurons, Upper motor neuron, Mechanoreceptors, Nociceptor, Photoreceptors, Proprioceptors, Amacrine cells, Auditory neuropathy, Axolemma, Axons, Axon hillock, Axoplasm, Basal dendrite, Basket cell, Betz cell, Biological neuron models, Bipolar cell of the retina, Brain cell, Catecholamine neurons, Climbing fiber, Dendrites, Dendritic spine, Ganglion cells, Grid cells, Internal arcuate fibers, Interneuron, Lateral giant neuron, Medium spiny neuron, Motor neurons, Myelin sheath, Neurite, Neurolemma, Neuron doctrine, Neuroprotection, Nodes of Ranvier, Place cells, Purkinje cells, Pyramidal cell, Reinnervation, Reinnervatrion, Rods, Squid giant axon, Axons, Dendrites, Myelin sheath, Neurons, Schwann cells. Excerpt: Alpha motor neurons (α-MNs) are large lower motor neurons of the brainstem and spinal cord. They innervate extrafusal muscle fibers of skeletal muscle and are directly responsible for initiating their contraction. Alpha motor neurons are distinct from gamma motor neurons, which innervate intrafusal muscle fibers of muscle spindles. While their cell bodies are found in the central nervous system (CNS), alpha motor neurons are also considered part of the somatic nervous system-a branch of the peripheral nervous system (PNS)-because their axons extend into the periphery to innervate skeletal muscles. An alpha motor neuron and the muscle fibers it innervates is a motor unit. A motor neuron pool contains all the alpha motor neurons involved in contracting a single muscle. Alpha motor...
