Are groups of skeletal muscle connected to each other through intercalated discs?

No, groups of skeletal muscle are not connected to each other through intercalated discs. Intercalated discs are specialized structures found exclusively in cardiac muscle, allowing for synchronized contraction. Skeletal muscle fibers, on the other hand, are multi-nucleated and do not have intercalated discs; they are connected by connective tissue and work together through motor neuron stimulation.