Brudzinski sign

noun

Brud·​zin·​ski sign brü-ˈjin-skē-  brüd-ˈzin- 

variants or Brudzinski's sign

-skē(z)- 

: any of several symptoms of meningeal irritation occurring especially in meningitis

especially : involuntary bending of the knees and hips of a supine patient caused by lifting the head of the patient so that the chin moves towards the chest