Spinal Cord: Stretch Reflex

This comprehensive video offers in-depth explanation of the stretch reflex pathway. It not only discusses the anatomy of extrafusal and intrafusal fibers at cellular level, but also explains the changes occurring in them during stretch. Timeline: 00:14 introduction 00:34 anatomy of skeletal muscle 03:46 function of extrafusal fibers and intrafusal fibers 06:23 nuclear bag fibers nuclear chain fibers 13:10 stretched nuclear bag fibers at cellular level 18:18 overall stretch reflex pathway 26:38 gamma motor neuron lesion 28:31 Stretched muscle fiber VS contracted muscle fiber