<unk>  rigidity is caused by a lesion in the cerebellum. The function of the cerebellum is to coordinate muscular activity. Animals with<unk>  rigidity show opisthotonus with thoracic limb extension, flexion of the pelvic limbs rigidly extended. Mentation of<unk>  animals is generally adequate.
Decerebellate
Locura
Corpuscles of Herbst
Voxelotor
Neurosphere
Medulla 
Medulla
Reticulotegmental nucleus