Five people were needed to subdue Aaron Heather after he attacked Sergeant Rachael Robins at Wyong Police Station, on the NSW Central Coast, in March, the state's Supreme Court was told on Tuesday.

The 48-year-old, who'd been arrested in relation to numerous offences including public exposure and burglary, was reportedly calm and compliant before he grabbed Sgt Robins' ponytail and kneed her four times in the head, a crown prosecutor said.

Other officers who came to her aid were also allegedly assaulted, including Sergeant Lisa Bennett whose lung was punctured.

Justice Robertson Wright said Heather had no previous record of violence or failure to comply with bail conditions.

But the judge said it was "extremely worrying" Heather's mental health hadn't been assessed since he'd entered custody, given his alleged offending began in the month before the police station incident.

"Without such an assessment, the court cannot be satisfied there will not be a similar episode in the future," he said.

"If there is a psychiatric problem and it recurs, then there is a very substantial risk of (Heather) endangering the safety of the victims and the community."

Heather had offered to live in the northern NSW town of Inverell and stay in the company of his brother "24/7", the court heard.

His case is due to come before Wyong Local Court on August 20.

Australian Associated Press