the face. The asymmetrical representation of the autonomic peripheral nervous system leads to the asymmetrical representation in the brain. The left hemisphere is activated predominantly by homeostatic afferents associated with parasympathetic functions and the right hemisphere is activated predominantly by homeostatic afferents associated with sympathetic functions. The lateralization is extremely apparent in the anterior cingulate cortex (ACC) and anterior insular cortex (AI) associated with higher emotions such as romantic love and motivation correlated with homeostatic functions. The left AI and ACC are more active during feelings of romantic love and maternal attachment. The AI and ACC were activated on both the right and left sides while watching pain being inflicted on a loved one while only the right AI and ACC that is elicited during subjective feelings of pain; this supports the association of right AI in aroused ('sympathetic') feelings and left AI in affiliative ('parasympathetic') feelings. Particularly, cardiovascular function appears to be lateralized and tied to emotional stress. Intense emotional stimuli that cause stress can lead to alterations in cardiovascular function. The right insular cortex probably plays the most significant role in these phenomena. Similar lateralization is probably involved in cardiovascular malfunction in patients with head injury, stroke, multiple sclerosis, brain tumors, meningitis and encephalitis, migraine, cluster headache and neurosurgical procedures. Lateralization due to lateralization of other functions "It is unlikely that the brain evolved an asymmetrical control of emotional behavior. Rather, it seems more likely that although there may be some asymmetry in the neural control of emotion, the observed asymmetries are largely a product of the asymmetrical control of other functions such as the control of movement, language, or the processing of complex sensory information," Lateralization may have been evolutionarily adaptive. Lateralization may allow for a greater variety of emotions. The left temporal cortex is involved in language processing while the right temporal cortex is involved in processing faces. This lateralization is also apparent when processing emotions. Lateralization and sex differences There may be a difference in cortical activation between men and women. Activity in the right hemisphere was greater in women when exposed to unpleasant images than men, though men showed more activation bilaterally while viewing pleasant pictures. Another study found that women but not men, with women had greater activation of their right hemisphere while viewing unpleasant faces and left hemisphere activation while viewing pleasant faces. Yet, another study found contrasting sex difference while recording