Objective To investigate the relationship of chronic sleep deprivation and high fat diet with laryn-gopharyngeal reflux (LPRD) .Methods A total of 16 rats were randomly divided into the experimental group and control group .Modified multiplatform water surface method and high fat diet (containing 35％ fat) were used in the experimental group rats .The rats in the control group had free sleep and normal feed .The upper gastrointestinal tract pH monitoring with double detectors was used to record the changes of pH in the both rats for 10 hours .The reflux index ,the times of re-flux with pH<4 and the longest duration of reflux were selected and converted into data of 24 hours .The three indexes of the experiment group were compared to those of the control group .Results There was no animal death during the model construction .The rats in the experimental group were irritable .There was no difference of rats weight in both groups before and after the experiment(P>0 .05) .The median of reflux index ,times of reflux with pH<4 and the longest duration of reflux of pharyngeal pH 2 detector in the rats of the experimental group were 21 .07 ,27 .25 and 61 .11 ,respectively .Those of the control group were 1 .25 ,0 .95 and 8 .44 ,respectively .Above three index of the experimental group increased obviously and the difference was statistically significant when compared to those of the control (P<0 .05) .It was suggested that LPRD might appear in the experimental group rats .The median of reflux index and the times of reflux with pH < 4 of esophageal pH1 detector in the rats of the experimental group were 15 .87 and 96 .67 ,displaying an increase when compared to those of the control group (26 .25 and 5 .6) .The differ-ences were statistically significant(P<0 .05);but the median of the longest duration of reflux in pH1 detector of the experimental group rats was 26 .25 ,failing to show statistical difference compared to that of the control group (5 .6) (P>0 .05) .Conclusion Chronic sleep deprivation and high fat diet may play an important role in the pathogenesis of LPRD .This animal model may be a new vector to study LPRD .

Posttraumatic stress disorder (PTSD), the most common mental illness after patients suffer physically or emotionally from traumatic events, can cause persistently strong, painful and terrible avoidance symptoms, emotional and cognitive changes, causing psychologically strong stimulation and heavy burden to patients and even leading to some extreme behavioral reactions. Traumatic brain injury (TBI) is an important factor in the occurrence of PTSD, both of which shares many similar pathological overlaps, and may coexist and interact with each other. The hippocampus and amygdala play a central role in the pathogenesis of PTSD, but the specific cellular and molecular and neural circuit mechanisms are still unclear. About two-thirds of the patients still meet the diagnostic criteria for PTSD after psychotherapy. However, the current treatment methods are complicated and not unified, and patients treated with medications may have adverse drug reactions, poor treatment outcomes and recurrence. Therefore, it is of great significance to further clarify the occurrence and development of PTSD in TBI patients. The authors reviewed the research progress of the pathogenesis and treatment of PTSD in TBI patients, so as to provide reference for the related research and treatment of PTSD in TBI patients.

Craniocerebral injury with seawater immersion is a special kind of compound injury, with low temperature, high permeability, high alkali, high salt content, and bacterial infection being the main causes. The injury is also characterized with complex damage mechanisms, difficulty to treat, and poor prognosis. At present, the damage mechanisms of craniocerebral injury with seawater immersion are mainly studied by establishing the experimental animal models at the levels of tissue, cell, organelle, molecule, etc. However, the craniocerebral injury with seawater immersion is more complex than the simple onshore craniocerebral injury, therefore, a stable disease model is not easy to construct. Most researches on the specific injury mechanisms are relatively single and one-sided, with many different views in existence, and the damage mechanisms of craniocerebral injury with seawater immersion have hitherto not been clear. The authors reviewed the research progress in the damage mechanisms of craniocerebral injury with seawater immersion, in order to promote the in-depth study of the mechanism of craniocerebral injury with seawater immersion and provide reference for its clinical treatment.