scholarly journals A marking of the cricothyroid membrane with extended neck returns to correct position after neck manipulation and repositioning

2020 ◽  
Vol 64 (10) ◽  
pp. 1422-1425 ◽  
Author(s):  
James Bowness ◽  
Wendy H. Teoh ◽  
Michael S. Kristensen ◽  
Andrew Dalton ◽  
Alexander L. Saint‐Grant ◽  
...  
Keyword(s):  
Cricothyroid Membrane ◽  
Correct Position ◽  
Neck Manipulation

An ultrasound study of the height of the cricothyroid membrane in a surgical population

2021 ◽  
Author(s):  
Umair Ansari ◽  
Catriona Frankling ◽  
Viola Mendonca ◽  
Clementine Stubbs ◽  
Cyprian Mendonca
Keyword(s):  
Cricothyroid Membrane ◽  
Ultrasound Study

scholarly journals Centrosome movement in the early divisions of Caenorhabditis elegans: a cortical site determining centrosome position.

1989 ◽  
Vol 109 (3) ◽  
pp. 1185-1193 ◽  
Author(s):  
A A Hyman
Keyword(s):  
Caenorhabditis Elegans ◽  
Cell Lineage ◽  
Correct Position ◽  
Rotational Movement ◽  
Cell Biol ◽  
Proposed Model

In Caenorhabditis elegans embryos, early blastomeres of the P cell lineage divide successively on the same axis. This axis is a consequence of the specific rotational movement of the pair of centrosomes and nucleus (Hyman, A. A., and J. G. White. 1987. J. Cell Biol. 105:2123-2135). A laser has been used to perturb the centrosome movements that determine the pattern of early embryonic divisions. The results support a previously proposed model in which a centrosome rotates towards its correct position by shortening of connections, possibly microtubules, between a centrosome and a defined site on the cortex of the embryo.

scholarly journals Sudden onset vomiting and vertigo following chiropractic neck manipulation.

1998 ◽  
Vol 74 (875) ◽  
pp. 567-568 ◽  
Author(s):  
C. E. Hillier ◽  
M. L. Gross
Keyword(s):  
Sudden Onset ◽  
Neck Manipulation

Review lecture: Apposition eyes of large diurnal insects as organs adapted to seeing

1980 ◽  
Vol 207 (1168) ◽  
pp. 287-309 ◽  
Keyword(s):  
Nodal Point ◽  
Visual Fields ◽  
Photoreceptor Cells ◽  
Resolving Power ◽  
Field Size ◽  
Correct Position ◽  
Anatomical Arrangement ◽  
Angular Coordinates ◽  
And Function ◽  
Facet Size

(1) The fields of view of the photoreceptor cells are determined by the dimensions and anatomical arrangement of the optical part of the ommatidium. The dimensions, and therefore the fields of view of the ommatidia are also related across the eye. In the relation between structure and function there are many points that invite discussion, but the intention is to order our knowledge so that the gaps become obvious. (2) The first step has been to make maps of the eyes showing the maximum theoretical resolving power of the facets and also the interommatidial angle, the reciprocal of which is the maximum spatial resolution of combinations of facets. The ratio of these two resolutions at each point shows the minimum overlap of the visual fields. These maps can be made from the outside of the eye; they show the main types of eye. (3) The next step is to work out the optics of individual ommatidia so that the focal lengths and receptor widths can be measured. The field width can then be predicted from the facet size and the subtense of the receptor at the posterior nodal point. The final step is to measure the field widths of individual ommatidia experimentally as a test of the optical theory, and to make maps of the actual fields in their correct position on the eye in angular coordinates. (4) Three examples of maps of actual fields are given, and their anato­mical and diffraction components are separated. The maps are an essential step towards the electrophysiological analysis of the ganglia behind the eye. A theory of the origin of the fields in terms of anatomy and optics also opens the way to an analysis of mechanisms that change the field size upon adaptation to light. A comparative study of the fields in different eye regions and in different species can also be related to visual habits and behaviour.

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