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Merkel cell

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175: 29: 211:(also called a Merkel cell-neurite complex). They are associated with slowly adapting (SA1) somatosensory nerve fibers. They react to low vibrations (5–15 Hz) and deep static touch such as shapes and edges. Due to a small receptive field (extremely detailed info) they are densely present in areas like fingertips; they are not covered (shelled) and thus respond to pressures over long periods. 239:
or "touch cells". Until recently this proposed function was controversial and hard to prove, due to the close physical association of Merkel cells with sensory nerve endings. However, recent work in mice and other model organisms demonstrates that Merkel cells intrinsically transform touch into
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approximately 10 μm in diameter. They are oval-shaped mechanoreceptors essential for light touch sensation and found in the skin of vertebrates. They are abundant in highly sensitive skin like that of the fingertips in humans, and make synaptic contacts with
244:, a mechanosensitive ion channel that responds to mechanical forces. Mice in which Piezo2 is knocked-out specifically in skin cells, but not sensory neurons, show decreased behavioral responses to gentle touch. 294: 251:(an older definition, more commonly classified as a part of dispersed neuroendocrine system) because they contain dense core granules, and thus may also have a 415:
Halata Z, Grim M, Bauman KI (March 2003). "Friedrich Sigmund Merkel and his "Merkel cell", morphology, development, and physiology: review and new results".
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Merkel cells are found in the skin and some parts of the mucosa of all vertebrates. In mammalian skin, they are clear cells found in the
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The origin of Merkel cells has been debated for over 20 years. Evidence from skin graft experiments in birds implies that they are
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Halata Z, Baumann KI, Grim M (January 2008). "6.02 - Merkel Cells". In Masland RH, Albright TD, Albright TD, Masland RH (eds.).
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Barbieri JS, Wanat K, Seykora J (January 2014). "Skin: Basic Structure and Function". In McManus LM, Mitchell RN (eds.).
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Fenner J, Clark RA (January 2016). "Anatomy, Physiology, Histology, and Immunohistochemistry of Human Skin".
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Van Keymeulen A, Mascre G, Youseff KK, Harel I, Michaux C, De Geest N, et al. (October 2009).
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Maksimovic S, Nakatani M, Baba Y, Nelson AM, Marshall KL, Wellnitz SA, et al. (May 2014).
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The Anatomical Record Part A: Discoveries in Molecular, Cellular, and Evolutionary Biology
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Rotondo JC, Bononi I, Puozzo A, Govoni M, Foschi V, Lanza G, et al. (July 2017).
2208: 2177: 1954: 1901: 1832: 1673: 1663: 1419: 1409: 1378: 1282: 1184: 1100: 1023: 962: 942: 922: 817: 766: 713: 682: 625: 588:"Epidermal Merkel cells are mechanosensory cells that tune mammalian touch receptors" 568: 519: 461: 432: 395: 370: 337: 333: 240:
electrical signals that are transmitted to the nervous system. Merkel cells express
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Most often, they are associated with sensory nerve endings, when they are known as
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Woo SH, Ranade S, Weyer AD, Dubin AE, Baba Y, Qiu Z, et al. (May 2014).
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derived, but experiments in mammals now demonstrate an epidermal origin.
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Morrison KM, Miesegaes GR, Lumpkin EA, Maricich SM (December 2009).
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The Merkel cell: structure-development-function- cancerogenesis
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Munde PB, Khandekar SP, Dive AM, Sharma A (September 2013).
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List of keratins expressed in the human integumentary system
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List of human cell types derived from the germ layers
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List of distinct cell types in the adult human body
704:. San Diego: Academic Press. pp. 1134–1144. 449: 359:Skin Tissue Engineering and Regenerative Medicine 323: 2297: 443: 414: 258: 1073: 873: 1087: 328:. New York: Academic Press. pp. 33–38. 188:(at the bottom of sweat duct ridges) of the 790:Journal of Oral and Maxillofacial Pathology 356: 1080: 1066: 880: 866: 27: 841:at the U.S. National Library of Medicine 811: 801: 760: 750: 676: 619: 562: 513: 158:cells, though more recent experiments in 173: 389: 2298: 271:—an aggressive and difficult to treat 247:Merkel cells are sometimes considered 1298:Somatosensory system (sense of touch) 1061: 887: 861: 450:Baumann KI, Halata Z, Moll I (2003). 326:The Senses: A Comprehensive Reference 1283:Vestibular system (sense of balance) 16:Receptors in the skin of vertebrates 13: 1278:Auditory system (sense of hearing) 853:Neuroscience Information Framework 710:10.1016/b978-0-12-386456-7.03501-2 367:10.1016/b978-0-12-801654-1.00001-2 147:, and make synaptic contacts with 14: 2322: 1293:Gustatory system (sense of taste) 1288:Olfactory system (sense of smell) 832: 361:. Academic Press. pp. 1–17. 1545:Infrared sensing in vampire bats 786:"Pathophysiology of merkel cell" 334:10.1016/b978-012370880-9.00341-8 267:may become malignant and form a 214: 100:Anatomical terms of neuroanatomy 1273:Visual system (sense of vision) 777: 726: 693: 849:NIF Search - Merckel Disc Cell 636: 579: 530: 481: 408: 383: 350: 317: 1: 1415:Auditory perception (hearing) 752:10.1158/1078-0432.CCR-16-2899 702:Pathobiology of Human Disease 310: 162:have indicated that they are 2061:Olfactory reference syndrome 1838:Alice in Wonderland syndrome 259:Susceptibility to malignancy 235:referred to Merkel cells as 169: 7: 2260:Sensory processing disorder 1430:Gustation (taste or flavor) 1420:Equilibrioception (balance) 543:The Journal of Cell Biology 506:10.1016/j.ydbio.2009.09.032 392:Junqueira's Basic Histology 390:Mescher, Anthony L (2016). 278: 226: 135:sensation and found in the 10: 2327: 2214:Supernumerary phantom limb 1550:Infrared sensing in snakes 1410:Visual perception (vision) 2277: 2222: 2191: 2160: 2112: 2079: 2031: 1993: 1965:Microwave auditory effect 1925: 1823: 1816: 1789: 1766: 1738: 1697: 1639: 1628: 1596: 1573: 1520: 1511: 1464: 1402: 1359: 1306: 1263: 1220: 1211: 1202: 1150: 1132:Transduction (physiology) 1112: 1099: 1034: 994: 976: 953: 895: 394:. McGraw-Hill Education. 263:Although uncommon, these 98: 85: 73: 68: 60: 46: 41: 26: 21: 1970:Music-specific disorders 1326:Vestibulocochlear (VIII) 843:Medical Subject Headings 803:10.4103/0973-029x.125208 739:Clinical Cancer Research 233:Friedrich Sigmund Merkel 125:tactile epithelial cells 1950:Auditory verbal agnosia 1804:Juxtacapillary receptor 1014:Intrafusal muscle fiber 1945:Auditory hallucination 1555:Surface wave detection 1160:Multimodal integration 179: 2204:Phantom limb syndrome 2152:Tactile hallucination 1341:Glossopharyngeal (IX) 1142:Active sensory system 555:10.1083/jcb.200907080 494:Developmental Biology 456:. Springer. pp.  290:Merkel cell carcinoma 269:Merkel cell carcinoma 231:The German anatomist 198:afferent nerve fibers 177: 152:afferent nerve fibers 64:Light touch sensation 2306:Nervous tissue cells 2013:Labyrinthine fistula 1980:Spatial hearing loss 1679:Campaniform sensilla 1394:Somatosensory cortex 209:Merkel nerve endings 131:essential for light 121:Merkel–Ranvier cells 1799:Nociceptin receptor 1669:Merkel nerve ending 1654:Mechanotransduction 1019:Nuclear chain fiber 933:Merkel nerve ending 669:10.1038/nature13251 661:2014Natur.509..622W 612:10.1038/nature13250 604:2014Natur.509..617M 285:Merkel nerve ending 2161:Nociception (pain) 1753:Olfactory receptor 1705:Photoreceptor cell 1659:Lamellar corpuscle 1583:Photomorphogenesis 1445:nociception (pain) 1137:Sensory processing 913:Lamellar corpuscle 429:10.1002/ar.a.10029 180: 127:, are oval-shaped 2293: 2292: 2278:Biases and errors 2273: 2272: 2209:Somatoparaphrenia 2178:Pain dissociation 2023:Ménière's disease 1955:Cortical deafness 1833:Visual impairment 1812: 1811: 1674:Bulbous corpuscle 1664:Tactile corpuscle 1632:sensory receptors 1624: 1623: 1507: 1506: 1460: 1459: 1425:Olfaction (smell) 1379:Vestibular cortex 1361:Cerebral cortices 1198: 1197: 1185:Motion perception 1055: 1054: 1024:Nuclear bag fiber 963:Free nerve ending 943:Bulbous corpuscle 923:Tactile corpuscle 889:Sensory receptors 745:(14): 3929–3934. 719:978-0-12-386457-4 655:(7502): 622–626. 598:(7502): 617–621. 467:978-3-540-00374-8 401:978-0-07-184270-9 376:978-0-12-801654-1 343:978-0-12-370880-9 114: 113: 109: 2318: 1940:Auditory agnosia 1872:Optic neuropathy 1821: 1820: 1689:Stretch receptor 1637: 1636: 1535:Magnetoreception 1530:Electroreception 1518: 1517: 1440:mechanoreception 1389:Gustatory cortex 1384:Olfactory cortex 1218: 1217: 1209: 1208: 1127:Sensory receptor 1110: 1109: 1082: 1075: 1068: 1059: 1058: 882: 875: 868: 859: 858: 826: 825: 815: 805: 781: 775: 774: 764: 754: 730: 724: 723: 697: 691: 690: 680: 640: 634: 633: 623: 583: 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anatomy 2183:Phantom pain 2168:Hyperalgesia 2142:Hypoesthesia 1960:Hearing loss 1781:TRP channels 1758:Osmoreceptor 1725:Photopigment 1649:Baroreceptor 1588:Gravitropism 1560:Frog hearing 1540:Echolocation 1336:Facial (VII) 1047:Baroreceptor 919:Light touch 839:Merkel Cells 793: 789: 779: 742: 738: 728: 701: 695: 652: 648: 638: 595: 591: 581: 546: 542: 532: 500:(1): 76–83. 497: 493: 483: 471:. 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Index


Skin
vertebrates
MeSH
D018862
NeuroLex
nifext_87
Anatomical terms of neuroanatomy
edit on Wikidata
mechanoreceptors
touch
skin
vertebrates
humans
somatosensory
afferent nerve fibers
neural crest
mammals
epithelial

stratum basale
epidermis
somatosensory
afferent nerve fibers
rete ridges
Merkel nerve endings
neural crest
Friedrich Sigmund Merkel
PIEZO2
APUD cells

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