Spoken English Tips
Body is the most reliable source of messages and meanings. Feelings of satisfaction, happiness, affection, modesty, sympathy, empathy, reassurance, surprise can be best and naturally expressed through bodily gestures. Gestures should obviously match with emphasis in sound.In the context of presenting a paper, the speaker may use his eyes, hands, head, chest, arms, fingers, palm to express feelings or emotions. A good presenter talks eye to eye. Speaking is not simply vocal; it is also a physical action.
Again by using hands and facial expressions, the speaker proves his appearance human, lively and natural.