sham rage

n. Extreme and unfocused anger in response to any prominent stimulus regardless of its desirability which is characteristic of animals whose cerebrum, septum pellucidum, or ventromedial thalamus has been severely damaged or removed or in which the connection between the hypothalamus and pituitary gland has been severed. It has also been observed in humans with massive brain damage from carbon monoxide poisoning and from severe hypoglycemic shock.