Plagiocephaly involves early fusion of either the right or left side of the coronal suture, the suture that extends from each ear over the top of the head to the fontanelle.
Frequencies of the types of craniosynostosis based on suture classification include: sagittal (50-58%); coronal (20-29%); metopic (4-10%); and lambdoid (2-4%).
Coronal suture-Skull suture that lies behind the forehead area, across the head from left side to the right side.
Additional paired antennae may occur within the coronal surface, which is the seat of the sensory styles, of less complex structure, which occur in many genera.
Thus at Cape Thorsden (7) in 1882-1883 the mean of a considerable number of observations made the angle between the two directions only 1° 7', the magnetic inclination being 80° 35', whilst the coronal centre had an altitude of 79° 55' and lay somewhat to the west of the magnetic meridian.
C. Ranyard a theory of coronal types, changing concurrently with the fluctuations of spot-activity.
St Patrick doubtless introduced the ordinary coronal tonsure, but in the period following his death the old druidical tonsure was again revived.
- Free medusae with rhopalia of the normal type; the exumbrella is divided by a circular, so-called coronal groove, into two parts, a central portion, which is conical, thimble-shaped, or domed in form, and a peripheral portion, the pedal zone, which bears the marginal lobes, tentacles and rhopalia; the pedal zone is subdivided into areas termed pedalia, from each of which arises a tentacle or rhopaliurn in the interspace between two adjacent lobes of the margin.
- Medusae with umbrella flattened or disk-like, without coronal groove; lips always prolonged into long oral arms. The most prolific and dominant group of the Scyphomedusae, containing two suborders; the Semaeostomae, in which the oral arms remain separate, and the Rhizostomeae, in FIG.
- Coronal Section through the Pelvis, showing the relations of the bladder above, prostate and bulb below.