Tyrone Smith, BBC Sport Scotland
Substitute Michael Nottingham had to be stretchered off deep into injury-time in the 1-0 loss to Dundee after suffering a suspected concussion.
The towering centre-half was in the mix as Livi pushed for an equaliser, but it ended in distressing scenes.
Manager David Martindale said post-match he wasn't quite sure what his player had done, but that he "wasn't great".
"He felt a wee bit dizzy post-match and he's jarred his neck as well," Martindale told BBC Scotland.
"I spoke to Jordan McGhee and he said Michael headered the back of his head, so I think there is a wee touch of concussion there.
"There is a spasm in his neck from the impact, so we had to get him off with a concussion [substitution].
"I don't think it is a bad one, it's more the neck. I hope the big man is going to be okay because we're just getting him back."