Journal of Morphology

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Quantitative assay of electromyograms during mastication in domestic cats (Felis catus)
Journal of Morphology - Tập 163 Số 3 - Trang 253-281 - 1980
Gerard C. Gorniak, Carl Gans
AbstractMastication has been studied by cinematography with synchronized electromyography (computer quantified and analyzed), while unanesthetized, freely feeding cats (Felis catus) were reducing equivalent‐sized chunks of raw and cooked beef and cooked chicken. Cats reduce food on one side at a time, and their chewing cycles show both ho...... hiện toàn bộ
A cineradiographic and electromyographic study of mastication in Tenrec ecaudatus
Journal of Morphology - Tập 185 Số 2 - Trang 155-182 - 1985
Uri Oron, A. W. Crompton
AbstractRegular chewing was studied in the specialized Malagasy insectivore Tenrec ecaudatus with the aid of precisely correlated electromyography of the main adductors, digastrics, and two hyoid muscles and cineradiography for which metallic markers were placed in the mandibles, tongue, and hyoid bone. During the power stroke the body of...... hiện toàn bộ
Electromyography and mechanics of mastication in the albino rat
Journal of Morphology - Tập 146 Số 1 - Trang 1-33 - 1975
W.A. Weijs, R. Dantuma
AbstractThe masticatory apparatus in the albino rat was studied by means of electromyography and subsequent estimation of muscular forces.The activity patterns of the trigeminal and suprahyoid musculature and the mandibular movements were recorded simultaneously during feeding. The relative forces of the individual muscles in the different stages o...... hiện toàn bộ
Physiology of feeding in miniature pigs
Journal of Morphology - Tập 141 Số 4 - Trang 427-460 - 1973
Susan W. Herring, Robert P. Scapino
AbstractThe anatomy and physiology of feeding in miniature swine were studied, using gross dissection, electromyography, cinematography, and cineradiography.Small particles are preferred for ingestion, and large items are usually broken down outside of the oral cavity. The particles are initially picked up with the lower lip and then retrieved by t...... hiện toàn bộ
A cytological study of the ovary of Rhodnius prolixus. I. The ontogeny of the follicular epithelium
Journal of Morphology - Tập 136 Số 4 - Trang 459-493 - 1972
Erwin Huebner, Everett Anderson
AbstractThe relatively undifferentiated cells comprising the prefollicular epithelium of the fourth and fifth instar of the reduvid bug Rhodninus prolixus are flattened and contain the regularly occurring organelles, lipid droplets, and aggregates of glycogen‐like particles. These cells transform into the adult prefollicular tissue.... hiện toàn bộ
Spermatogenesis in bombyx mori. I. The canal system joining sister spermatocytes
Journal of Morphology - Tập 134 Số 1 - Trang 47-55 - 1971
Robert C. King, Hiromu Akai
AbstractAn electron microscopic investigation was made of the origin and morphology of the canal system that connects sister spermatocytes of larval Bombyx mori. Canal formation results from incomplete cleavages during the mitoses which immediately precede meiosis. We suggest the lip which surrounds each canal is derived from the contract...... hiện toàn bộ
The division and differentiation of Drosophila cystocytes
Journal of Morphology - Tập 121 Số 1 - Trang 55-70 - 1967
Elizabeth A. Koch, Patricia Smith, Robert C. King
AbstractLight and electron microscopical studies allow a descriptive account to be given of he morphogenesis of the egg chamber of Drosophila melanogaster. The study demonstrates that the mitotic products of a single cystoblast generate a branching chain of 16 inter‐connected cystocytes. Two specific cystocytes enter meiotic prophase, whi...... hiện toàn bộ
Ultrastructural observations on oogenesis in Drosophila
Journal of Morphology - Tập 137 Số 1 - Trang 29-48 - 1972
Anthony P. Mahowald
AbstractThe ultrastructure of the follicle cells and oocyte periplasm is described during the stages of oogenesis immediately prior to, during, and immediately subsequent to, vitellogenesis. A number of features have not been described previously in Drosophila. Some yolk appears prior to pinocytosis of blood proteins. However, most of the...... hiện toàn bộ
Postcranial morphology and the locomotor habits of living and extinct carnivorans
Journal of Morphology - Tập 274 Số 2 - Trang 121-146 - 2013
Joshua X. Samuels, Julie Meachen, Stacey Akemi Sakai
AbstractMembers of the order Carnivora display a broad range of locomotor habits, including cursorial, scansorial, arboreal, semiaquatic, aquatic, and semifossorial species from multiple families. Ecomorphological analyses from osteological measurements have been used successfully in prior studies of carnivorans and rodents to accurately infer the locomotor habits ...... hiện toàn bộ
Skeletal indicators of locomotor adaptations in living and extinct rodents
Journal of Morphology - Tập 269 Số 11 - Trang 1387-1411 - 2008
Joshua X. Samuels, Blaire Van Valkenburgh
AbstractLiving rodents show great diversity in their locomotor habits, including semiaquatic, arboreal, fossorial, ricochetal, and gliding species from multiple families. To assess the association between limb morphology and locomotor habits, the appendicular skeletons of 65 rodent genera from 16 families were measured. Ecomorphological analyses of various locomoto...... hiện toàn bộ
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