Study of posed emotion in facial EMG asymmetry

37 subjects' facial electromyographic activity at the corrugator and zygomatic muscle regions were recorded while they were posing with happy and sad facial expressions. Analysis showed that the mean value of EMG activity at the left zygomatic muscle region was the highest, followed by the right zygomatic, left corrugator, and right corrugator muscle regions, while a happy facial expression was posed. The mean value of EMG activity at the left corrugator muscle region was the highest, followed by those for the right corrugator, left zygomatic, and right zygomatic muscle regions while a sad facial expression was posed. Further analysis indicated that the power of facial EMG activity on the left side of the face was stronger than on the right side of the face while posing both happy and sad expressions.     

On the ethics of facial transplantation research

Transplantation continues to push the frontiers of medicine into domains that summon forth troublesome ethical questions. Looming on the frontier today is human facial transplantation. We develop criteria that, we maintain, must be satisfied in order to ethically undertake this as-yet-untried transplant procedure. We draw on the criteria advanced by Dr. Francis Moore in the late 1980s for introducing innovative procedures in transplant surgery. In addition to these we also insist that human face transplantation must meet all the ethical requirements usually applied to health care research. We summarize the achievements of transplant surgery to date, focusing in particular on the safety and efficacy of immunosuppressive medications. We also emphasize the importance of risk/benefit assessments that take into account the physical, aesthetic, psychological, and social dimensions of facial disfiguration, reconstruction, and transplantation. Finally, we maintain that the time has come to move facial transplantation research into the clinical phase.     

Hemispheric asymmetry in the processing of high and low spatial frequencies: a facial recognition task

The research investigated the relationship between spatial frequency and visual field in a facial recognition task. Faces of neutral affect (Ekman, 1979) were tachistoscopically presented to the right or left visual field. The faces were presented alone, or masked with square wave gratings of 1, 24, or 48 cycles/degree, for a duration of 10 msec. Accuracy in recognizing each target face from a group of five served as the dependent measure. Subjects were 15 males and 15 females. ANOVA results included a frequency x visual field interaction effect (p less than .001). As was hypothesized, LVF errors were highest in the absence of low spatial frequencies, while RVF errors were highest when a higher range of spatial frequencies was removed. These results confirm that the hemispheres show a differential efficiency in processing high and low spatial frequency information in faces. They also offer empirical evidence to support the clinical findings that both hemispheres contribute to facial recognition.     

Neuropsychological aspects of facial asymmetry during emotional expression: A review of the normal adult literature

This review focuses on facial asymmetries during emotional expression. Facial asymmetry is defined as the expression intensity or muscular involvement on one side of the face (“hemiface”) relative to the other side and has been used as a behavioral index of hemispheric specialization for facial emotional expression. This paper presents a history of the neuropsychological study of facial asymmetry, originating with Darwin. Both quantitative and qualitative aspects of asymmetry are addressed. Next, neuroanatomical bases for facial expression are elucidated, separately for posed/voluntary and spontaneous/involuntary elicitation conditions. This is followed by a comprehensive review of 49 experiments of facial asymmetry in the adult literature, oriented around emotional valence (pleasantness/unpleasantness), elicitation condition, facial part, social display rules, and demographic factors. Results of this review indicate that the left hemiface is more involved than the right hemiface in the expression of facial emotion. From a neuropsychological perspective, these findings implicate the right cerebral hemisphere as dominant for the facial expression of emotion. In spite of the compelling evidence for right-hemispheric specialization, some data point to the possibility of differential hemispheric involvement as a function of emotional valence. An earlier version of this paper by the first author was presented at the XV Annual Symposium of the Society of Craniofacial Genetics, July 12, 1992, Stanford University, Palo Alto, CA.     

The procreative asymmetry and the impossibility of elusive permission

Philosophical Studies - This paper develops a form of moral actualism that can explain the procreative asymmetry. Along the way, it defends and explains the attractive asymmetry: the claim...     

Hemiregional facial asymmetry in expression of emotion: a concept needs to be verified.

In most of the neuropsychological studies the left-right hemifacial asymmetry during expression of emotion has been reported, although the present author proposed a concept of hemiregional asymmetry and reported that greater left hemifacial involvement was specific to the lower region of the face and greater right hemifacial was specific to the upper region of the face. It is speculated that this differential hemifacial involvement is a function of the right hemisphere, and it is explained in terms of neural innervation to facial muscles. This speculation needs to be verified further to arrive at a general conclusion.     

Meditating selflessly at the dawn of a new millennium

Increasingly open to question are the efficacies and timing of some traditional, conventional and current meditative techniques. Recent brain research emphasizes that it is important to distinguish between the Self-centred (egocentric) and other-centred (allocentric) streams of processing. It also proves useful to view as complementary the assets of the concentrative and receptive styles of meditation, especially when one's practices cultivate an appropriate balance between their top-down and bottom-up systems of attentive processing. From this neural perspective, Part I ventures a small sample of empirical suggestions. Some of these could help practitioners engage in more open, effortless, choiceless, varieties of receptive meditation–indoors and outdoors. Part II discusses recent research that illuminates issues arising at the interface between Self and other. The evidence suggests how a balanced attentiveness might enable long-term meditators to enhance mindfulness of the present moment, while simultaneously becoming much less fearful and, ultimately, freer to openly express their most objective, innate instincts of selfless compassion.

The art of Progress is to preserve order amid change and to preserve change amid order. (Alfred North Whitehead 1861–1947)     

The power of faces: A review of John T. Lanzetta's research on facial expression and emotion

Provides a comprehensive review of John T. Lanzetta's research program on facial expression and emotion. After reviewing the study that initiated this research program (Lanzetta & Kleck, 1970), the program is described as developing along four distinct lines of research: (1) the role of facial expression in the modulation and self-regulation of emotion, (2) the evocative power of the face as an emotional stimulus, (3) the role of facial expression in empathy and counterempathy, and (4) the role of facial displays in human politics. Beyond reviewing the major studies and key findings to emerge from each of these lines, the progression of thought underlying the development of this research program as a whole and the interrelations among the individual research lines are also emphasized.     

The Venus effect: people's understanding of mirror reflections in paintings

We propose the term 'Venus effect' for a common phenomenon in picture perception. It occurs when a picture shows an actor and a mirror that are not placed along the observer's line of sight, for instance a Venus admiring herself in a small mirror, and when the actor's reflection in the mirror is visible to the observer. In this situation, observers tend to report, incorrectly, that Venus is also seeing herself in the mirror in the same location as the observer. We discuss this using famous paintings as examples.     

The effects of facial control and facial mimicry on subjective reactions to comedy routines

The impact of facial control on subjective reactions to dubbed (created with inserts of smiling people) and undubbed comedy routines was examined. The presence of dubs increased EMG activity over thezygomaticus major andorbicularis oculi muscle regions for spontaneous-condition subjects, but not for inhibit-condition subjects. Analyses also showed that spontaneous-condition subjects exhibited increased smiling at dub points, a finding that is consistent with the notion that subjects mimicked the inserted facial displays. Self-report findings revealed that spontaneous-condition subjects reported significantly greater amusement to the dubbed compared with the undubbed routines, whereas inhibit-condition subjects' self-reports of amusement did not differentiate dub conditions. Furthermore, spontaneous-condition subjects reported significantly more amusement to the dubbed routines than did inhibit-condition subjects. Despite strong facial control effects on facial EMG activity, no main effect of facial condition on self-reported amusement was found, and therefore, the data provide no support for a general version of facial feedback theory. The data are consistent with the view that mimetic responses enhanced subjective reactions, and they are compatible with the Leventhal and Tomkins versions of facial feedback theory.The research was supported by NSF Grant No. BNS-8507600 and the Lincoln Filene Endowment to Dartmouth College. The authors wish to acknowledge helpful comments provided by Ursula Hess, Timothy L. Hubbard, Arvid Kappas, and two anonymous reviewers.