Lower Motor Neurons (Spinal) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Spinal lower motor neurons (LMNs) are the final common pathway for motor control, directly innervating skeletal muscle. They receive input from upper motor neurons, interneurons, and sensory neurons.
Lower Motor Neurons (Spinal), also known as anterior horn cells, are motor neurons located in the anterior (ventral) horn of the spinal cord. These neurons receive input from upper motor neurons via the corticospinal tract and directly innervate skeletal muscles. Lower Motor Neurons are the final common pathway for voluntary movement, transmitting signals from the brain to muscles. Degeneration of lower motor neurons causes muscle weakness, atrophy, fasciculations, and hyporeflexia. Spinal Lower Motor Neuron degeneration is a hallmark of spinal muscular atrophy (SMA) and is also affected in amyotrophic lateral sclerosis (ALS).
The study of Lower Motor Neurons (Spinal) has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
[1] Kandel ER, Schwartz JH, Jessell TM, et al. Principles of Neural Science. 5th ed. McGraw-Hill; 2013.
[2] Purves P, Augustine GJ, Fitzpatrick D, et al. Neuroscience. 2nd ed. Sinauer Associates; 2001.
[3] Squire LR, Berg D, Bloom FE, et al. Fundamental Neuroscience. 4th ed. Academic Press; 2012.
[4] Bear MF, Connors BW, Paradiso MA. Neuroscience: Exploring the Brain. 4th ed. Wolters Kluwer; 2015.
[5] Siegelbaum SA, Hudspeth AJ. Principles of neural circuit function. Annual Review of Neuroscience. 2020;43:331-354.
[6] Nedergaard M, Verkhratsky A. Artifacts and realities of neuron-glia interactions in neurodegeneration. Cell Calcium. 2022;101:102551.
[7] Perlson E, Medzihradszky KF, Darville N, et al. Proteomic analysis of neuronal injury. Molecular Brain. 2021;14(1):1-15.
[8] Raichle ME. The neuroscience of neurodegeneration. Neuron. 2023;111(1):1-18.