Energetic electrons as an energy transport mechanism in solar flares

A review is conducted of the observations and theory relating to the role of energetic electrons in the solar flare, with particular emphasis on discriminating between 'thermal' and 'nonthermal' origins of these electrons. Diagnostics in hard X-rays, especially those relating to the recent observations of the SMM and Hinotori satellites are discussed. Attention is briefly given to the response of the atmosphere to energy input in the form of high energy electrons, in particular through the diagnostics of both the Fe K-alpha feature and optically thin transition region lines such as OV. Finally, the relative roles of electron and proton heating in gamma-ray flare events are discussed.