Strong coincidence between slow wave sleep and low AHI is explainable by the high instability of slow wave sleep to obstructive apnea exposure.

It is well known that in patients with obstructive sleep apnea syndrome (OSAS) the apnea-hypopnea index (AHI) is significantly decreased during slow wave sleep (SWS). It used to be explained by the ability of SWS to stabilize the upper airways against collapse. Another explanation, which is the focus of the current study, is that it is just a result of high instability of SWS to obstructive apnea exposure, i.

Update on Sexual Dimorphism in Brain Structure-Function Interrelationships: A Literature Review.

A remarkable feature of the human brain is its sexual dimorphism. While it is well documented that the sexual dimorphism in brain structure and function exists, its clinical implications in healthy individuals as well as in those who suffer from various neuropsychiatric disorders remain to be further explored. The present paper aims to provide an overview of the remarkable features and the fundamental characteristics of the sexual dimorphism in brain performance along with clinical implications based on the review of the relevant meta-analyses published up-to-date.