Social vocalizations can release oxytocin in humans.
Vocalizations are important components of social behaviour in many vertebrate species, including our own. Less well-understood are the hormonal mechanisms involved in response to vocal cues, and how these systems may influence the course of behavioural evolution. The neurohormone oxytocin (OT) partly governs a number of biological and social processes critical to fitness, such as attachment between mothers and their young, and suppression of the stress response after contact with trusted conspecfics. Rodent studies suggest that OT's release is contingent upon direct tactile contact with such individuals, but we hypothesized that vocalizations might be capable of producing the same effect. To test our hypothesis, we chose human mother-daughter dyads and applied a social stressor to the children, following which we randomly assigned participants into complete contact, speech-only or no-contact conditions. Children receiving a full complement of comfort including physical, vocal and non-verbal contact showed the highest levels of OT and the swiftest return to baseline of a biological marker of stress (salivary cortisol), but a strikingly similar hormonal profile emerged in children comforted solely by their mother's voice. Our results suggest that vocalizations may be as important as touch to the neuroendocrine regulation of social bonding in our species.
Seltzer
Leslie J
LJ
Departmentsof Psychology, University of Wisconsin-Madison, Madison, WI 53705, USA. lseltzer@wisc.edu
Ziegler
Toni E
TE
Pollak
Seth D
SD
D000328:Adult; D002648:Child; D003463:Cues; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000032:analysis; D009035:Mothers; D010121:Oxytocin / Q000652:urine*; D012463:Saliva / Q000737:chemistry; D012919:Social Behavior; D013315:Stress, Psychological; D014705:Verbal Behavior
D010121:Oxytocin; D006854:Hydrocortisone
Psychoneuroendocrinology. 1998 Nov;23(8):819-35
9924739
Neurosci Lett. 2008 Dec 19;448(1):67-70
18926879
Biochem Soc Trans. 2007 Nov;35(Pt 5):1252-7
17956324
Science. 2008 Jul 18;321(5887):417-21
18635807
Acta Neurobiol Exp (Wars). 1996;56(3):779-85
8917906
Ann N Y Acad Sci. 1997 Jan 15;807:146-63
9071348
Neuropsychobiology. 1993;28(1-2):76-81
8255414
Biol Psychol. 2008 Jan;77(1):1-10
17931766
Horm Behav. 2001 Feb;39(1):48-58
11161883
J Clin Endocrinol Metab. 1987 Jan;64(1):27-31
3782434
J Clin Endocrinol Metab. 1990 Dec;71(6):1531-5
2229310
Proc Natl Acad Sci U S A. 2005 Nov 22;102(47):17237-40
16303870
Dev Psychopathol. 2009 Winter;21(1):69-85
19144223
Psychoneuroendocrinology. 2009 Nov;34(10):1542-53
19553027
Psychoneuroendocrinology. 1998 Nov;23(8):779-818
9924738
Proc Natl Acad Sci U S A. 2005 Nov 1;102(44):16096-101
16249339
Biol Psychiatry. 1998 Feb 15;43(4):270-7
9513736
Horm Behav. 2007 Aug;52(2):274-9
17553502
Ann N Y Acad Sci. 1992 Jun 12;652:204-11
1626829
Horm Behav. 2000 Feb;37(1):49-56
10712858
Horm Behav. 1995 Sep;29(3):407-24
7490013
Horm Behav. 2007 Mar;51(3):436-42
17292369
Horm Behav. 2006 Nov;50(4):506-17
16890230
Front Neuroendocrinol. 2004 Sep-Dec;25(3-4):150-76
15589267
Science. 2008 Nov 7;322(5903):900-4
18988842
Biochem Biophys Res Commun. 1985 Feb 28;127(1):277-82
3977923
J Comp Neurol. 2009 Oct 1;516(4):321-33
19637308
Science. 2009 Jan 23;323(5913):454-7
19164722
Physiol Behav. 2003 Sep;79(4-5):775-82
12954422
Nature. 1984 Apr 5-11;308(5959):541-3
6709060
Psychol Rev. 2000 Jul;107(3):411-29
10941275
Adv Exp Med Biol. 1998;449:215-24
10026808
Am J Psychiatry. 1997 Jun;154(6):726-35
9167498
Psychosom Med. 2005 Jul-Aug;67(4):531-8
16046364
Trends Endocrinol Metab. 1996 May-Jun;7(4):126-31
18406738
Neuroreport. 2002 Dec 3;13(17):2193-7
12488795
Science. 2007 Sep 7;317(5843):1347-51
17823344
J Comp Neurol. 2003 Jul 14;462(1):1-14
12761820
J Neuroendocrinol. 1999 Nov;11(11):867-72
10520137
Science. 2000 Jul 28;289(5479):586-90
10915614