Paw preference assessed by a food-reaching test was studied in male and female cats. Of the total sample (N = 66), 34 (51.5%) were right-preferent, 24 (36.4%) left-preferent, and 8 (12.1%) ambilateral. In the total sample, there was evidence for an overall paw preference, general paw preference, right-, and left-paw preference. The distribution of the right- minus left-paw reaches was neither normal, nor U or J shaped. Of the males (N = 24), 10 (41.7%) were right-pawed, 12 (50.5%) left-pawed, and 2 (8.3%) ambilateral. In males, there was evidence for an overall, general, and right-, left-paw preference relative to no preference. The right- minus left-paw reaches fitted to guassian data with two prominent peaks due to the right- and left-preferents. In females (N = 42), 22 (52.4%) were right-preferent, 14 (33.3%) left-preferent, and 6 (14.3%) ambilateral. There was an overall, general, and right-preference but not a left-preference relative to no preference. The distribution of the right- minus left-paw reaches was neither normal nor U or J shaped. The female right-preferents showed a right-bias compared to males. The left-preferent males were more left-preferent than the right-preferent males are right preferent. The mean right- minus left- paw reaches for the female right-preferents were significantly higher than those for the male right-preferents. There was no significant difference between the right- minus left-paw reaches of the male and female left-preferents. The paw preferences exhibited consistency over time; no learning tendencies were established during testing periods for at least 10 days. Considering the mean right-paw reaches for each successive day (N = 10), the mean right-paw uses in the right-preferents was higher in females than males. The mean left-paw uses in left-preferents was about the same for males and females. In males, the mean left-paw uses for the left-pawed males were higher than the right-paw reaches for the male right-preferents. In females, there was no difference between the right paw reaches of the right-preferents and the left-paw reaches of the left-preferents. It was concluded that there is a right-bias in paw preference of cats, which is caused by the female right-preferents under the influence of a biological factor.(ABSTRACT TRUNCATED AT 400 WORDS)
Obstructive sleep apnea (OSA) syndrome has emerged as a major public health problem because of its high prevalence amongst middle-aged, obese men as well as in lean individuals and women. It has been suggested that obesity's role in the genesis of sleep apnea is rather through its metabolic activity than a purely anatomic/mechanical impact. Recent studies demonstrate that circulating levels of adipokines, adipose tissue-derived secretory proteins, are altered in patients with OSA syndrome. For instance, leptin level is increased, whereas that of adiponectin decreased in OSA, and these changes can be reversed by treatment of apnea/hypopnea episodes. Adipokine pro le seems to change towards a proin ammatory pattern that may also contribute to OSA-related cardiometabolic diseases. The mechanisms of adipose dysfunction in OSA includes hypoxia, oxidative stress and increased sympathetic nervous activity, including alterations in the circulating levels of the neurotrophins nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF). In e ect, reversing hypoxia and attenuating oxidative stress and in ammation through adipokine-and NGF/BDNFtargeted pharmacology may provide novel therapeutic opportunities in patients with OSA syndrome.
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