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Motor Neuron Disease: Diseases characterized by a selective degeneration of the motor neurons of the spinal cord, brainstem, or motor cortex. Clinical subtypes are distinguished by the major site of degeneration. In Amyotrophic lateral sclerosis there is involvement of upper, lower, and brainstem motor neurons. In progressive muscular atrophy and related syndromes (see Muscular atrophy, Spinal) the motor neurons in the spinal cord are primarily affected. With progressive bulbar palsy (Bulbar palsy, Progressive), the initial degeneration occurs in the brainstem. In primary lateral sclerosis, the cortical neurons are affected in isolation. (Adams et al., Principles of Neurology, 6th ed, p1089)

The Neuromuscular Junction: Measuring Synapse Size, Fragmentation and Changes in Synaptic Protein Density Using Confocal Fluorescence Microscopy

1Physiology and Bosch Institute, University of Sydney, 2Motor Neuron Disease Research Group, Australian School of Advanced Medicine, Macquarie University, 3Advanced Microscopy Facility, Bosch Institute, University of Sydney

JoVE 52220


 Neuroscience

Conversion of Human Induced Pluripotent Stem Cells (iPSCs) into Functional Spinal and Cranial Motor Neurons Using PiggyBac Vectors

1Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, 2Center for Life Nano Science, Istituto Italiano di Tecnologia, 3Laboratory of Stem Cell biology and Molecular Embryology, The Rockefeller University, 4Department of Physiology and Pharmacology, Sapienza University of Rome

Video Coming Soon

JoVE 59321


 JoVE In-Press

Electrophysiological Motor Unit Number Estimation (MUNE) Measuring Compound Muscle Action Potential (CMAP) in Mouse Hindlimb Muscles

1Department of Neurology, The Ohio State University Wexner Medical Center, 2Department of Physical Medicine and Rehabilitation, The Ohio State University, 3Department of Neuroscience, The Ohio State University Wexner Medical Center, 4Department of Biochemistry and Pharmacology, The Ohio State University Wexner Medical Center

JoVE 52899


 Behavior

Assessment of Calcium Sparks in Intact Skeletal Muscle Fibers

1Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, 2Department of Physiology and Cell Biology, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, 3Department of Molecular Biophysics and Physiology, Rush University Medical Center, 4Department of Internal Medicine, Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center

JoVE 50898


 Biology

Motor Exam I

JoVE 10052

Source:Tracey A. Milligan, MD; Tamara B. Kaplan, MD; Neurology, Brigham and Women's/Massachusetts General Hospital, Boston, Massachusetts, USA


Abnormalities in the motor function are associated with a wide range of diseases, from movement disorders and myopathies to strokes. The motor assessment starts with observation of the patient.…


 Physical Examinations III

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