Origin of the speech apparatus and its reconstruction in fossils.

Renewed enthusiasm has produced provocative speculations in recent literature on the origin of speech. The purpose of the present investigation is to expose the adaptive renovations underlying the emergence of a “Vocal Tract” and from this to define its anatomical substrate which governs the biomechanics of speech production. The vocal tract is a double resonator tube coupled in series and composed of oral and pharyngeal cavities. Analysis is made of the crucial structural elements of this complex from detailed dissections in modern man and the study of modern and fossil hominid crania. The study focuses on relations of the skull base, jaw, hyoid bone and the contained tongue, pharynx and valvular devices, calling into question recent reconstructions built on classical Neanderthal skulls.     

Testosterone reactivity to infant crying and caregiving in women: The role of oral contraceptives and basal cortisol

Several studies have shown that mothers and fathers have significant lower levels of testosterone (T) than non-mothers and non-fathers, and that in men caregiving is related to a decrease in T. To date, only a few studies have examined T in women. We examined T reactivity to a crying infant simulator in 160 women. Use of oral contraceptives (OC), basal cortisol (CORT) levels and childhood experiences of maternal love withdrawal were taken into account. T levels were consistently significantly higher in women not using OC. In women not using OC, high basal CORT was related to higher initial T levels and larger decreases of T during caregiving. No effect of basal CORT was found in women with OC use. Childhood experiences of maternal love withdrawal did not affect T levels. This is the first study to show support for a decrease of T in women while taking care of a crying infant, supporting the Challenge hypothesis and the Steroid/Peptide Theory of Social Bonds.     

Temporal dynamics of the eye–voice span and eye movement control during oral reading

The distance between eye movements and articulation during oral reading, commonly referred to as the eye–voice span, has been a classic issue of experimental reading research since Buswell (1921). To examine the influence of the span on eye movement control, synchronised recordings of eye position and speech production were obtained during fluent oral reading. The viewing of a word almost always preceded its articulation, and the interval between the onset of a word's fixation and the onset of its articulation was approximately 500 ms. The identification and articulation of a word were closely coupled, and the fixation–speech interval was regulated through immediate adjustments of word viewing duration, unless the interval was relatively long. In this case, the lag between identification and articulation was often reduced through a regression that moved the eyes back in the text. These results indicate that models of eye movement control during oral reading need to include a mechanism that maintains a close linkage between the identification and articulation of words through continuous oculomotor adjustments.     

The making of careers, the making of a discipline: Luck and chance in migrant careers in geriatric medicine

The geriatric specialty, unpopular among most UK born and trained medical graduates, provided an opportunity for career development and achievement for those doctors whose training had been non-standard for a variety of reasons. Migrant doctors who have played a substantive role in the UK National Health Service since its inception made an important contribution to the building of that specialty, at the same time building their own careers. This paper draws on oral history interviews with the UK trained pioneers of geriatric medicine and with South Asian overseas trained doctors who entered the geriatric specialty in the middle decades of the twentieth century. It critically reviews the literature of skilled migration, specifically in terms of ‘brain drain’ and ‘push–pull’, focusing on historical and socio-cognitive communities and emphasizes the contribution of individual narratives of career development in the lives of migrants. Focusing on the use of luck and chance in accounts it suggests that although such terms are indicative of chance upon opportunity, they also suggest a role for agency in career development in contexts which were not auspicious. The outcome, for those interviewed, was regarded positively in career terms, but also had a significant part to play in the development of the career of the specialty of geriatric medicine and in the lives of the marginalized people for whom they developed a service.