The mammalian cochlea is sophisticated in its function and highly organized in its structure. Although the anatomy of this sense organ has been well documented, the molecular mechanisms underlying its development have remained elusive. Information generated from mutant and knockout mice in recent years has increased our understanding of cochlear development and physiology. This article discusse...

Single-domain magnetite crystals have been isolated and characterized from tissue located in a sinus within the dermethmoid bone of the skull of the yellowfin tuna, Thunnus albacares. Their chemical composition, narrow size distribution, and distinctive crystal morphology indicate that these crystals are biochemical precipitates. Experiments on the interaction between particles reveal the organ...

We have analysed four strains of Drosophila melanogaster which each carry the transposon P[lac,ry+] at a unique genomic location. In one of the strains, P[lac,ry+]A37, all the peripheral neurones that we can identify express the P-lac fusion protein; in at least some cases, and the support cells associated to particular neurones are also labelled. Expression of the fusion protein can be detecte...

Spatially coordinated behavior is possible only because many features of the body's structure and of the structure of the world are highly predictable. From the primitive chaos of the impressions collected by our sense organs, a system of stable and permanent spatial referents progressively emerges in relation to the moving and ever-changing framework of bodily positions. The prerequisite to th...

The sense organ for hearing in birds, the basilar papilla, is capable of replacing lost or damaged hair cells and supporting cells through regeneration. Potential candidates for precursor-cell populations include cells within the auditory receptor epithelium and nonsensory cells inferior to the sensory epithelium. Ultrastructural characteristics of hyaline cells, border cells, and vacuole cells...

In this chapter, I present the outlines of a formal theory of word accent.1 The theory is nonmetrical in that the account of primary accent location is not based on iterative foot structure. The theory separates the representations of primary and rhythmic accents, the idea being that the latter are accounted for ‘‘with reference to’’ the primary accent location. This means that rhythmic structu...

Six hundred and twelve drivers with chronic disease, mainly diabetes, cardiovascular disease, renal disorders, and diseases of the sense organs, were investigated with regard to the frequency of road accidents and serious driving offences during a Io-year period. Road accidents directly caused by the disease or its treatment occurred in four (o-8%) cases, all due to hypoglycaemic attacks in ins...

Surnmary The possibilities of penurbing nematode sensory perception as a basis for novel control strategies cannot be assessed effectively until more information is available on the chemosensory and secretory roles of the anterior sense organs of plant parasitic nematodes. This brief review presents sorne of the CUITent research prograrrunes at Rothamsted Experimental Station which investigate ...

Sarcosaprophagous insects have sense organs highly adapted for the detection of carcasses. Consequently, in summer these insects are usually the first to find dead human bodies. Often, when the police arrive at the scene of a murder, sarcosaprophagous insects and even their offspring are already present in the corpse in large numbers. It is possible to draw some conclusions about the date of th...

The VS-3 slit-sense organs of the tropical wandering spider Cupiennius salei contain two types of mechanosensory neurons with similar morphology but different adaptation properties. We measured the changes in membrane potential produced by mechanical stimulation and by electric current stimulation in a large number of neurons of both types. No significant differences were found between the pass...