What do women want? Facialmetric assessment of multiple motives in the perception of male facial physical attractiveness.

The multiple motive hypothesis of physical attractiveness suggests that women are attracted to men whose appearances elicit their nurturant feelings, who appear to possess sexual maturity and dominance characteristics, who seem sociable, approacheable, and of high social status. Those multiple motives may cause people to be attracted to individuals who display an optimal combination of neotenous, mature, and expressive facial features, plus desirable grooming attributes. Three quasi-experiments demonstrated that men who possessed the neotenous features of large eyes, the mature features of prominent cheekbones and a large chin, the expressive feature of a big smile, and high-status clothing were seen as more attractive than other men. Further supporting the multiple motive hypothesis, the 2nd and 3rd studies indicated that impressions of attractiveness had strong relations with selections of men to date and to marry but had a curvilinear relation with perceptions of a baby face vs. a mature face.

The ultrasound femur length as a predictor of fetal length.

A linear relationship between the ultrasound fetal femur length and the crown-heel length of the fetus is described. The formula for calculating the fetal length in centimeters was found to be 6.18 + 0.59 x femur length in millimeters. The value and potential uses of the calculated length of the fetus are discussed.

Delayed postischemic hypoperfusion: a potentially damaging consequence of stroke.

Cerebral blood flow (CBF) was assessed with radioactive butanol and antipyrine during and after 1 hour of unilateral carotid artery occlusion in gerbils. Animals with clinical evidence of stroke demonstrated a marked fall in ipsilateral CBF during occlusion "no-reflow" phenomenon did not develop; instead, blood flow returned to normal 5 minutes after the termination of carotid occlusion. Flow subsequently fell to half the control value, however, and remained depressed for several hours despite local metabolic demands. This delayed imbalance in energy supply and demand creates a potential for additional brain damage that might be prevented by appropriate therapeutic intervention.

Tuning of single fibers in the cochlear nerve of the alligator lizard: relation to receptor morphology.

(1) The general anatomy of the peripheral portion of the cochlear nerve in the alligator lizard is described. (2) Spike discharges of single units were recorded with micropipets placed in the peripheral portion of the cochlear nerve of anesthetized lizards. (3) In response to tone bursts, each unit is maximally sensitive to a charactertistic frequency (CF). There are two distinct populations of units having different CFs: a low CF population (CF in the range 0.2-0.8 kHz) recorded in the portion of the nerve that enters the apical region of the basilar papilla and a high CF population (CF in the range 0.9-4.0 kHz) recorded in the portion of the nerve that enters the basal region. The low CF units are more sharply tuned than the high CF units. (4) Comparison of cochlear nerve units of the alligator lizard with those of mammals shows that the tuning of low CF units resembles that of mammalian units of the same CF. The tuning of high CF lizard units differs significantly from mammalian units. (5) The distinct differences in tuning of low and high CF units are correlated with distinct differences in the structure of the basilar papilla in the apical and basal regions rather than with differences in the width of the basilar membrane.