This video tells us about the pathophysiology of spinal muscular atrophy and covers the occurrence rate, effects, mechanism of action of SMA, genetic mutation and types of SMA together with the functional proteins that are important. Spinal muscular atrophy (SMA) is a group of hereditary diseases that progressively destroys motor neurons. TIMELINE: 0:02 Introduction 0:13 Population ratio 0:25 Affects on physical functions 0:39 SMA mechanism of action. 0:55 Atrophy of muscle and neuron 1:05 Genetic mutation 1:19 Types of SMA 1:40 Functional important proteins 1:54 End