[kat-uh-toh-nee-uh, -tohn-yuh] 
| a syndrome seen most frequently in schizophrenia, characterized by muscular rigidity and mental stupor, sometimes alternating with great excitement and confusion. |
catatonia cat·a·to·ni·a (kāt'ə-tō'nē-ə)
n.
An abnormal condition often associated with schizophrenia and variously characterized by stupor, stereotypy, mania, and either rigidity or extreme flexibility of the limbs.
əˈtoʊ