caa a22 4500 386348480 CHVBK 20180307111820.0 cr unu---uuuuu 161130e198905 xx s 000 0 eng 10.1017/S0022215100156634 doi S0022215100156634 pii (NATIONALLICENCE)cambridge-10.1017/S0022215100156634 Normal growth pattern of the middle ear cleft in the human fetus [Elektronische Daten] The normal growth pattern of the middle ear cleft was studied on macro- and histological sections of the human fetus. When compared with adult temporal bones, the inclination of the tympanic ring remains unaltered throughout fetal development. Expansion of the middle ear cleft is caused by intrinsic growth and by lateral displacement of its constituent elements: tympanic ring, otic capsule and squamous bone. Not only are the two mutually different modes of growth movement quite dissimilar in magnitude and direction, but so is their resultant vector for each constituent; this dissimilarity in growth movement leads to a characteristic change in shape of the middle ear cleft and to the curvature of the tympanic membrane. The intrinsic growth of these elements is simultaneously accompanied by remodelling of their shape; lateral displacement of the squamous bone and tympanic ring is caused by the pressure of the enlarging brain. The consequences of developmental disturbances on the normal growth pattern are discussed. Copyright © JLO (1984) Limited 1989 Declau F. (Antwerp, Belgium) Moeneclaey L. (Antwerp, Belgium) Marquet J. (Antwerp, Belgium) The Journal of Laryngology & Otology Cambridge University Press 103/5(1989-05), 461-465 0022-2151 103:5<461 1989 103 JLO https://doi.org/10.1017/S0022215100156634 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022215100156634 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Declau F. (Antwerp, Belgium) NATIONALLICENCE 700 1- Moeneclaey L. (Antwerp, Belgium) NATIONALLICENCE 700 1- Marquet J. (Antwerp, Belgium) NATIONALLICENCE 773 0- The Journal of Laryngology & Otology Cambridge University Press 103/5(1989-05), 461-465 0022-2151 103:5<461 1989 103 JLO CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge