Wikipedia

Goose bumps

(Redirected from Pilomotor reflex)
For the book series, see Goosebumps. For other uses, see Goosebumps (disambiguation).

Goose bumps, goosebumps or goose-pimples[1] (also called chill bumps[citation needed]) are the bumps on a person's skin at the base of body hairs which may involuntarily develop when a person is tickled, cold or experiencing strong emotions such as fear, euphoria or sexual arousal.[2][3]

Goosebumps
Other namesGoose-pimples, goose-skin, goose-flesh, cutis anserina, horripilation, horripilatio
Goose-bumps on a human arm
SpecialtyDermatology

The formation of goose bumps in humans under stress is considered by some to be a vestigial reflex,[4] though visible piloerection is associated with changes in skin temperature in humans.[5] The reflex of producing goose bumps is known as piloerection or the pilomotor reflex, or, more traditionally,[6] horripilation. It occurs in many mammals; a prominent example is porcupines,[7] which raise their quills when threatened, or sea otters when they encounter sharks or other predators.

Anatomy and biology

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Goose bumps are created when tiny muscles at the base of each hair, known as arrector pili muscles, contract and pull the hair straight up. The reflex is started by the sympathetic nervous system, which is responsible for many fight-or-flight responses. The muscle cells connected to the hair follicle have been visualized by actin immunofluorescence.[8]

Arrector pili muscle

Arrector pili muscles (APM) are smooth muscles which connect the basement membrane to the hair follicle. When these muscles contract, they increase the trapping of air on the surface of the skin and in turn, causes thermoregulation to the body. It used to be believed that each APM was connected to an individual hair follicle. More recent studies have disproved this and now explain that there can be multiple hair follicles connected to a single APM. In between the hair follicle and the APM there are lobules which form an angular shape. These lobules are sebaceous gland lobules which are supported by the APM.[9]

 
1) Epidermis 2) Arrector pili muscle 3) Hair follicle 4) Dermis The diagram shows that the arrector pili muscle is connected to the hair follicle and the epidermis resulting in the erection of the hair during muscle contraction causing goose bumps.

Hair follicle

Hair follicles have four parts. There is the bulb, supra bulbar area, isthmus and infundibulum. The bulb is to be known as the part that is responsible for the growth of the rest of the hair follicle.[10]

As a response to cold

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In animals covered with fur or hair, the erect hairs trap air to create a layer of insulation. Goose bumps can also be a response to anger or fear: the erect hairs make the animal appear larger, in order to intimidate enemies. This can be observed in the intimidation displays of chimpanzees,[11] some New World monkeys like the cotton-top tamarin,[12] in stressed mice[13] and rats, and in frightened cats.

In humans

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In humans, goose bumps can even extend to piloerection as a reaction to hearing nails scratch on a chalkboard, or feeling or remembering strong and positive emotions (e.g., after winning a sports event), or while watching a horror film.[14]

 
Goose bumps in a kitten, due to a fear of heights.

Some people can deliberately evoke goose bumps in themselves without any external trigger. This is called "voluntarily generated piloerection." Further research is needed to discover more on such people.

Goose bumps are accompanied by a specific physiological response pattern that is thought to indicate the emotional state of being moved.[15]

In humans, goose bumps occur everywhere on the body, including the legs, neck, and other areas of the skin that have hair. In some people, they even occur in the face or on the head. In humans, goose bumps tends to occur across the whole body, especially when elicited by thermal or emotional stimuli, and only locally when elicited via tactile stimuli.[16]

Piloerection is also a classic symptom of some diseases, such as temporal lobe epilepsy, some brain tumors, and autonomic hyperreflexia. Goose bumps can also be caused by withdrawal from opiates such as heroin. A skin condition that mimics goose bumps in appearance is keratosis pilaris.

Causes

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Extreme temperatures

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Goose bumps can be experienced in the presence of flash-cold temperatures, for example being in a cold environment, and the skin being able to re-balance its surface temperature quickly. The stimulus of cold surroundings causes the tiny muscles (arrector pili muscle) attached to each hair follicle to contract. This contraction causes the hair strands to stand straight, the purpose of which is to aid in quicker drying via evaporation of water clinging to the hair which is moved upward and away from the skin.[citation needed]

Intense emotion

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The emotional correlates of piloerection in humans are not well understood.[2] People often say they feel their "hair standing on end" when they are frightened or in awe.

Music

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Most research using musical stimuli has focused on self-reported "chills" which is a subjective experience, unlike piloerection which is an objectively quantifiable physiological reaction. However, research has shown that self-reported piloerection does not correspond to observed piloerection. Thus, research on the chills should not be considered to extend to the physiological phenomena of piloerection.

Ingestion

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Medications and herbal supplements that affect body temperature and blood flow may cause piloerection. For example, one of the common reported side effects of the intake of yohimbine is piloerection.[17][18]

Opiate withdrawal

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Piloerection is one of the signs of opioid withdrawal.[19][20] The term "cold turkey" meaning abrupt withdrawal from a drug, may derive from the goose bumps that occur during abrupt withdrawal from opioids; this resembles the skin of a refrigerated plucked turkey.[21][22]

Voluntary control

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An unknown proportion of people may consciously initiate the sensation and physiological signs of piloerection.[23] The phenomenon is discovered spontaneously, appearing to be innate, and is not known to be possible to learn or acquire. Those with the ability frequently are unaware that it is not possible for everyone. The ability appears to correlate with personality traits associated with openness to experience.[24]

Etymology

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Moderate goose bumps

The term "goose bumps" derives from the phenomenon's association with goose skin. Goose feathers grow from pores in the epidermis that resemble human hair follicles. When a goose's feathers are plucked, its skin has protrusions where the feathers were, and these bumps are what the human phenomenon resembles.[25]

It is not clear why the particular fowl, goose, was chosen in English (and German, Greek, Icelandic, Italian, Swedish, Danish, Norwegian, Polish and Czech)[26] as most other birds share this same anatomical feature. Other languages may use a different species. For example, the hen or chicken is used in Vietnamese, Korean, Japanese, Cantonese, Finnish, Dutch, Luxembourgish, French, Spanish, Portuguese, Romanian, and Galician; Irish uses both;[citation needed] Hebrew, the duck; the ants (referred to as "murashki", alluding to the feeling of ants crawling on one's skin) in Ukrainian and Russian;[26] and a variety of synonyms in Mandarin.[27]

Some authors have applied "goose bumps" to the symptoms of sexually transmitted diseases.[28] "Bitten by a Winchester goose" was a common euphemism for having contracted syphilis[29] in the 16th century.[30] "Winchester geese" was the nickname for the prostitutes of Southern London,[31] licensed by the Bishop of Winchester in the area around his London palace.

See also

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References

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  1. ^ "Goosebumps noun – Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com".
  2. ^ a b McPhetres, Jonathon; Zickfeld, Janis H. (2022-09-01). "The physiological study of emotional piloerection: A systematic review and guide for future research" (PDF). International Journal of Psychophysiology. 179: 6–20. doi:10.1016/j.ijpsycho.2022.06.010. ISSN 0167-8760. PMID 35764195. S2CID 250058771.
  3. ^ McPhetres, Jonathon (2024-08-15). "Diverse stimuli induce piloerection and yield varied autonomic responses in humans". Biology Open. 13 (8). doi:10.1242/bio.060205. ISSN 2046-6390. PMC 11391818. PMID 38989667.
  4. ^ Darwin, Charles (1872). "The Expression of the Emotions in Man and Animals". London: John Murray. pp. 101–103.
  5. ^ McPhetres, Jonathon (2024-08-15). "Diverse stimuli induce piloerection and yield varied autonomic responses in humans". Biology Open. 13 (8). doi:10.1242/bio.060205. ISSN 2046-6390. PMC 11391818. PMID 38989667.
  6. ^ OUP. "horripilation". Oxford English Dictionary.
  7. ^ Chapman, David M.; Roze, Uldis (1997-01-01). "Functional histology of quill erection in the porcupine, Erethizon dorsatum". Canadian Journal of Zoology. 75 (1): 1–10. doi:10.1139/z97-001. ISSN 0008-4301.
  8. ^ Hanukoglu I, Boggula VR, Vaknine H, Sharma S, Kleyman T, Hanukoglu A (January 2017). "Expression of epithelial sodium channel (ENaC) and CFTR in the human epidermis and epidermal appendages". Histochemistry and Cell Biology. 147 (6): 733–748. doi:10.1007/s00418-016-1535-3. PMID 28130590. S2CID 8504408.
  9. ^ Torkamani, N., Rufaut, N., Jones, L., & Sinclair, R. (2014). Beyond goosebumps: Does the arrector pili muscle have a role in hair loss? International Journal of Trichology, 6(3), 88–94. doi:10.4103/0974-7753.139077
  10. ^ Torkamani, N., Rufaut, N., Jones, L., & Sinclair, R. (2014). Beyond goosebumps: Does the arrector pili muscle have a role in hair loss? International Journal of Trichology, 6(3), 88–94. doi:10.4103/0974-7753.139077
  11. ^ Martin Muller and John Mitan. Conflict and Cooperation in Wild Chimpanzees. Archived 2006-09-08 at the Wayback Machine Advances in the Study of Behavior, vol. 35
  12. ^ French and Snowdon. Sexual dimorphism in responses to unfamiliar intruders in the tamarin, Saguinus oedipus. Animal Behaviour (1981) vol. 29 (3) pp. 822–829
  13. ^ Masuda; et al. (Jul 1999). "Developmental and pharmacological features of mouse emotional piloerection". Experimental Animals. 48 (3): 209–211. doi:10.1538/expanim.48.209. PMID 10480027.
  14. ^ George A. Bubenik (September 1, 2003), "Why do humans get goosebumps when they are cold, or under other circumstances?", Scientific American
  15. ^ Benedek, Kaernbach (2011). "Physiological correlates and emotional specificity of human piloerection". Biological Psychology. 86 (3): 320–329. doi:10.1016/j.biopsycho.2010.12.012. PMC 3061318. PMID 21276827.
  16. ^ McPhetres, Jonathon (2024-08-15). "Diverse stimuli induce piloerection and yield varied autonomic responses in humans". Biology Open. 13 (8). doi:10.1242/bio.060205. ISSN 2046-6390. PMC 11391818. PMID 38989667.
  17. ^ Smet, Peter A. G. M.; et al. (1997). Adverse Effects of Herbal Drugs, Volume 3. Germany: Springer-Verlag Berlin Heidelberg. ISBN 978-3-540-60181-4. Retrieved 19 September 2015.
  18. ^ Goldberg, M R (1983). "Influence of yohimbine on blood pressure, autonomic reflexes, and plasma catecholamines in Humans". Hypertension. 5 (5): 776–777. doi:10.1161/01.HYP.5.5.772. PMID 6352483. Retrieved 19 September 2015.
  19. ^ "Withdrawal Syndromes Clinical Presentation: History, Physical Examination". medscape.com. Retrieved 15 April 2017.
  20. ^ Parkar, S.R.; Seethalakshmi, R; Adarkar, S; Kharawala, S (1 January 2006). "Is this 'complicated' opioid withdrawal?". Indian J Psychiatry. 48 (2): 121–122. doi:10.4103/0019-5545.31604. PMC 2913562. PMID 20703400.
  21. ^ Hales, Robert E.; Yudofsky, Stuart C.; Roberts, Laura Weiss (2014). The American Psychiatric Publishing Textbook of Psychiatry, Sixth Edition. American Psychiatric Publishing. p. 779. ISBN 9781585624447.
  22. ^ Ghodse, Hamid (2010). Ghodse's Drugs and Addictive Behaviour: A Guide to Treatment. Cambridge University Press. p. 77. ISBN 9781139485678.
  23. ^ Katahira, Kenji; Kawakami, Ai; Tomita, Akitoshi; Nagata, Noriko (2020-06-05). "Volitional Control of Piloerection: Objective Evidence and Its Potential Utility in Neuroscience Research". Frontiers in Neuroscience. 14: 590. doi:10.3389/fnins.2020.00590. ISSN 1662-453X. PMC 7290233. PMID 32581701.
  24. ^ Heathers, James A.J.; Fayn, Kirill; Silvia, Paul J.; Tiliopoulos, Niko; Goodwin, Matthew S. (July 30, 2018). "The voluntary control of piloerection". PeerJ. 6: e5292. doi:10.7717/peerj.5292. ISSN 2167-8359. PMC 6071615. PMID 30083447.
  25. ^ Online Etymology Dictionary – "Goose-bumps"
  26. ^ a b Translations for goose-bumps in English wiktionary
  27. ^ Dialectal map for goose-bumps in Mandarin
  28. ^ Roberts, Chris (2004), Heavy words lightly thrown: the reason behind the rhyme, Granta, p. 24, ISBN 978-1-86207-765-2
  29. ^ Buret, Frédéric (1895), Syphilis to-day and among the ancients v. 2–3, F.A. Davis, p. 48
  30. ^ Buret, Frédéric (1895), Syphilis to-day and among the ancients v. 1, F.A. Davis, p. 62 dates the aforementioned manuscript to the 16th century
  31. ^ Wabuda, Susan (2002), Preaching during the English Reformation, Cambridge studies in early modern British history, Cambridge University Press, p. 127, ISBN 978-0-521-45395-0
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