Less Empathic and More Reactive: The Different Impact of Childhood Maltreatment on Facial Mimicry and Vagal Regulation.
Facial mimicry and vagal regulation represent two crucial physiological responses to others' facial expressions of emotions. Facial mimicry, defined as the automatic, rapid and congruent electromyographic activation to others' facial expressions, is implicated in empathy, emotional reciprocity and emotions recognition. Vagal regulation, quantified by the computation of Respiratory Sinus Arrhythmia (RSA), exemplifies the autonomic adaptation to contingent social cues. Although it has been demonstrated that childhood maltreatment induces alterations in the processing of the facial expression of emotions, both at an explicit and implicit level, the effects of maltreatment on children's facial mimicry and vagal regulation in response to facial expressions of emotions remain unknown. The purpose of the present study was to fill this gap, involving 24 street-children (maltreated group) and 20 age-matched controls (control group). We recorded their spontaneous facial electromyographic activations of corrugator and zygomaticus muscles and RSA responses during the visualization of the facial expressions of anger, fear, joy and sadness. Results demonstrated a different impact of childhood maltreatment on facial mimicry and vagal regulation. Maltreated children did not show the typical positive-negative modulation of corrugator mimicry. Furthermore, when only negative facial expressions were considered, maltreated children demonstrated lower corrugator mimicry than controls. With respect to vagal regulation, whereas maltreated children manifested the expected and functional inverse correlation between RSA value at rest and RSA response to angry facial expressions, controls did not. These results describe an early and divergent functional adaptation to hostile environment of the two investigated physiological mechanisms. On the one side, maltreatment leads to the suppression of the spontaneous facial mimicry normally concurring to empathic understanding of others' emotions. On the other side, maltreatment forces the precocious development of the functional synchronization between vagal regulation and threatening social cues facilitating the recruitment of fight-or-flight defensive behavioral strategies.
Department of Neuroscience, University of Parma, Parma, Italy.|Ravera Children Rehabilitation Centre (RCRC), Lakka, Freetown, Sierra Leone.
Martina
M
Ardizzi
Department of Pharmacy, University of Parma, Parma, Italy.
Maria Alessandra
MA
Umiltà
Ravera Children Rehabilitation Centre (RCRC), Lakka, Freetown, Sierra Leone.
Valentina
V
Evangelista
Ravera Children Rehabilitation Centre (RCRC), Lakka, Freetown, Sierra Leone.|Department of Health Psychology, Hospital of Sanremo, Sanremo, Italy.
Alessandra
A
Di Liscia
Ravera Children Rehabilitation Centre (RCRC), Lakka, Freetown, Sierra Leone.|Department of Health Psychology, Hospital of Sanremo, Sanremo, Italy.
Roberto
R
Ravera
Department of Neuroscience, University of Parma, Parma, Italy.|Institute of Philosophy, School of Advanced Study, University of London, London, United Kingdom.
Vittorio
V
Gallese
Psychophysiology. 1982 Nov;19(6):643-7
7178381
Novartis Found Symp. 2007;278:3-12; discussion 12-9, 89-96, 216-21
17214307
PLoS One. 2014 Oct 22;9(10):e110763
25337916
Psychophysiology. 1986 Sep;23(5):567-89
3809364
Emotion. 2009 Oct;9(5):640-8
19803586
Int J Psychophysiol. 2012 Aug;85(2):195-9
22634269
J Exp Child Psychol. 1995 Apr;59(2):299-316
7722437
Curr Opin Neurobiol. 2002 Apr;12(2):169-77
12015233
Psychophysiology. 1997 Nov;34(6):623-48
9401419
Biol Psychol. 2007 Feb;74(2):243-62
17070982
Psychophysiology. 2001 Jan;38(1):22-34
11321618
Cognition. 2009 Feb;110(2):242-7
19059585
J Trauma Stress. 2009 Oct;22(5):399-408
19795402
Science. 2007 May 18;316(5827):1002-5
17510358
PLoS One. 2015 Oct 28;10(10):e0141732
26509890
Front Psychol. 2013 Sep 03;4:523
24027541
Eur J Psychotraumatol. 2013 May 15;4:null
23687563
J Trauma Stress. 2011 Dec;24(6):615-27
22147449
PLoS One. 2013;8(3):e57889
23536774
Infant Behav Dev. 2012 Jun;35(3):335-47
22721734
Lancet. 2009 Jan 3;373(9657):68-81
19056114
Biol Psychol. 2007 Feb;74(2):116-43
17049418
Soc Neurosci. 2007;2(3-4):167-78
18633815
Psychophysiology. 2009 Sep;46(5):996-1004
19549069
Int J Psychophysiol. 2001 Oct;42(2):123-46
11587772
Physiol Behav. 2003 Aug;79(3):503-13
12954445
Dev Psychol. 2002 Sep;38(5):784-91
12220055
Dev Sci. 2009 Jul;12(4):510-20
19635079
Scand J Psychol. 1998 Mar;39(1):39-45
9619131
Dev Psychobiol. 2013 Mar;55(2):101-12
22212893
Ann N Y Acad Sci. 2003 Dec;1008:31-47
14998870
Dev Psychobiol. 2014 Jul;56(5):964-78
24142832
Dev Psychopathol. 2010 Winter;22(1):109-18
20102650
Proc Natl Acad Sci U S A. 2002 Jun 25;99(13):9072-6
12072570
J Trauma Dissociation. 2009;10(3):276-96
19585337
J Abnorm Psychol. 2004 Feb;113(1):44-55
14992656
J Psychiatr Res. 2006 Mar;40(2):112-21
16176819
Dev Psychopathol. 2014 Nov;26(4 Pt 1):1021-33
24914736
PLoS One. 2013 Apr 10;8(4):e61004
23593374