However, studies assessing the effect of facial mimicry on the recognition of emotion are still controversial. The present study used the pathological model of PD to examine the role of facial mimicry on emotion recognition by investigating EMG responses in PD patients during a facial emotion recognition task anger, joy, neutral. Our results evidenced a significant decrease in facial mimicry for joy in PD, essentially linked to the absence of reaction of the zygomaticus major and the orbicularis oculi muscles in response to happy avatars, whereas facial mimicry for expressions of anger was relatively preserved. We also confirmed that PD patients were less accurate in recognizing positive and neutral facial expressions and highlighted a beneficial effect of facial mimicry on the recognition of emotion.
Symptoms - Mask-like Expression
Does Facial Amimia Impact the Recognition of Facial Emotions? An EMG Study in Parkinson’s Disease
Claret , Barcelona, Spain. Apathy is a frequent feature of Parkinson's disease PD , usually related with executive dysfunction. However, in a subgroup of PD patients apathy may represent the only or predominant neuropsychiatric feature. To understand the mechanisms underlying apathy in PD, we investigated emotional processing in PD patients with and without apathy and in healthy controls HC , assessed by a facial emotion recognition task FERT. We excluded PD patients with cognitive impairment, depression, other affective disturbances and previous surgery for PD. PD patients with apathy scored significantly worse in the FERT, performing worse in fear, anger, and sadness recognition. No differences, however, were found between nonapathetic PD patients and HC.
Facial Expression Processing Is Not Affected by Parkinson’s Disease, but by Age-Related Factors
This setup allows us to address both effects of PD and age-related differences. We employed a rating task for all groups in which 12 rating dimensions were used to assess evaluative processing of 27 expression videos from six different actors. Most importantly, we found that the PD group did not differ in any rating dimension from the older healthy control group HCG , indicating highly similar evaluation processing. Both older groups, however, did show significant differences for several rating scales in comparison with the younger adults HCG.
By Editorial Team. Not all people with PD experience the same symptoms , or to the same severity. When people with PD have a mask-like expression, their face has less facial movements and appears less animated. The scientific term for this is hypomimia, which means a reduction in the expressiveness of the face that is marked by diminished animation and movement of the facial muscles.