The third and final U.S. presidential debate between Republican candidate Donald Trump and Democrat Hillary Clinton wrapped up at the University of Nevada in Las Vegas on Wednesday night. The bitter rivals went head to head on everything from the economy to abortion to immigration.

The two candidates stood on opposite ends of the stage at their individual podiums and responded to questions on a variety of topics from the moderator, Fox News anchor Chris Wallace, sitting before them. Trump and Clinton each had a camera fixated on them during the entire exchange, allowing prospective voters to witness their subtle gestures, sideways glances and forced expressions.

So what did it all mean? CTVNews.ca breaks down what the presidential nominees communicated to the audience beyond their words.

The missing handshake:

Perhaps one of the most glaring moments from the debate happened during the candidates鈥� entrances. Typically, party nominees shake hands with each other at the beginning of the event as a display of respect. Trump and Clinton shook hands at the opening of their first debate and at the end of the second one, but there was no handshake before or after the final debate. Bart Rossi, a political psychologist, told 麻豆影视 Channel on Wednesday from Naples, Fla. that the absent handshake demonstrates how relations between the two parties have deteriorated over the course of the campaign.

鈥淏oth campaigns really despise each other,鈥� Rossi said.

Rossi thinks the Clinton camp believes that Trump鈥檚 side has manufactured one lie after another about her and they鈥檙e angry about it. On the other hand, it appears that Trump鈥檚 team is frustrated because he鈥檚 not winning in the polls, according to Rossi.

Trump鈥檚 agitation:

Trump point

As the debate progressed and the candidates took more personal shots at one another, Rossi said that some of Trump鈥檚 mannerisms betrayed him and showed how agitated he had become. The psychologist suggested the Republican candidate appeared to become increasingly unsettled by the end of the night when Clinton fired back at him on topics such as his tax returns or lack thereof.

鈥淗e started squinting his eyes,鈥� Rossi said. 鈥淚 don鈥檛 think he looked comfortable in his own skin like Hillary Clinton did.鈥�

Rossi thought Trump鈥檚 鈥渁ngry bully-like tone鈥� in his voice, his frequent pointing at his opponent and his angry facial expressions revealed how uncomfortable he had become.

鈥淚 thought he looked and acted in a convoluted, unstable manner towards the end of this debate,鈥� Rossi said.

Clinton鈥檚 smile:

Clinton smile

Clinton鈥檚 persistent smiling throughout the debate incited a firestorm of comments on Twitter about how 鈥渃reepy鈥� or 鈥渆vil鈥� it made her seem. Many users also suggested that her plastered smile made her appear untrustworthy.

Rossi disagreed with the negative remarks on social media and said he thought Clinton came across as presidential during the debate. He said she looked agitated at times but for the most part, held herself in a composed way.

鈥淪he moved her hands and she gestured with her body and her facial expressions in a way where she looked comfortable being herself,鈥� Rossi said.