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| Name | Motor system -Screening exam -Pattern of muscle weakness |
| Video Uploader | Video From OpenMedSchool |
| Upload Date | This Video Uploaded At 11-06-2023 16:22:21 |
| Video Discription | The motor neurons whose axons terminate at neuromuscular junctions and activate voluntary skeletal muscles are the lower motor neurons. These are located in the anterior horns of the spinal cord grey matter and the motor cranial nerve nuclei. The upper motor neurons are situated in the cerebral cortex, and their axons leave the cortex to control the lower motor neurons. These are distributed in the primary motor cortex, supplementary motor area, and premotor cortex. The effect of lower motor neuron lesion is the weakness (ultimately paralysis) of affected muscles with marked wasting,hypotoniaand hyporeflexia. The effects of upper motor neuron lesions are more variable, depending on the pathways affected. There can be a loss of dexterity, weakness, spasticity, hyper reflex,Babinski sign and absent superficial reflexes.. |
| Category | Education |
| Tags | motor system | LMN | UMN | Pyramidal pattern |
