The Gunners are sitting at the top of the Premier League, leading Manchester City by two points and Arteta has made a series of little tweaks to bolster morale.
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One has been to allow players to bring in their own preferred items into the away dressing room and one extreme example has been a replica clock atop the Clock End at the Emirates.
In Arsenal's latest win in the Premier League, a 3-0 victory over Fulham at Craven Cottage, the players posed with the clock in the dressing room.
Writing in his Daily Mail column, Souness was baffled by Arteta's policy, even calling it 'nonsense'.
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He wrote: "I read the story about Arsenal taking their home comforts into opposition dressing rooms and had to read it again to make sure it wasn't a joke.
"Really? Is this what the modern game has become?
"So Arsenal players arrive at Fulham to find their own clock is on the wall along with their own pictures and stickers?
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"It's extremely strange and only a winning manager can get away with that.
"The Arsenal boss Mikel Arteta is doing a fine job but he has form for such nonsense."
Arteta did explain his actions after Arsenal beat Fulham,
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"It was something I related to a few days before on where we were as a team and club and what we have to stand for," the Spaniard told ESPN.
"It was something private in the dressing room just before the game and something that's in the history of our club.
"We have to be really conscious of that and when we have that history and we use it in the right way, that's a really powerful thing to have.
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"The reality is that every game is so important, the margins are so small and we are now going to have to do something incredible until the end of the season to earn the right to be there."
Arsenal face managerless Crystal Palace next in the Premier League on Sunday afternoon just days after crashing out of the Europa League on penalties to Sporting.
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