OBJECTIVE To develop a nasal airflow-inducing maneuver and apply it in the olfactory rehabilitation of patients who have undergone laryngectomy. DESIGN Intervention study; before-and-after trial. SETTING National cancer center. PATIENTS Forty-four patients who underwent laryngectomy; 34 men and 10 women; mean age, 64 years (range, 42-80 years); mean time since surgery, 6 years (range, 8 m...

High- and low-yawning rats (HY and LY) were selectively bred as a function of their spontaneous yawning frequency with the LY subline about 2 yawns/hr and the HY 20 yawns/hr. The HY rats have more grooming bouts and travel longer distances in an open field. HY dams spent less time in the nest, retrieved their pups faster, and show a longer latency to licking and mouthing the pups than the LY or...

Evolutionary analyses of human behavior have illuminated a number of fundamental questions (i.e., foraging, mating systems, communication, etc.), and a wide array of behaviors have been targeted for investigation (infanticide, polygyny, child abuse, homicide, etc.). In general, investigation has centered on complex behaviors organized into broader functional units based on their context, or in ...

Nitric oxide (NO) has been implicated in large number of pathologies ad in normal physiological function of the brain. The aim of this study was to recognize the effect of Nitro-L-Arginine Methyl Ester mHC1 (NAME) and L-Arginine Ethyl Ester.HC1 (ARGININE) on reactivity of the central DA Dg receptor to agonist (Quinpirole) in rats. For this reason we have been used specific behavioural procedure...

Background In some cases of hemiplegia, the initiation of yawning is associated with involuntary raising of the paralysed arm. Reports are scarce in the literature, probably because the phenomenon has largely been overlooked. Methods We studied six patients from two neurologic units, and compared them with published cases from the last 200 years. Brain imaging typically shows a small vascular l...

Research indicates that the motor action pattern of yawning functions to promote cortical arousal and state change through enhanced intracranial circulation and brain cooling. Because the magnitude of this response likely corresponds to the degree of neurophysiological change, we hypothesized that interspecies variation in yawn duration would correlate with underlying neurological differences. ...