amirsina homayooni

Serotonergic system hyperactivity at 5-HT2A receptors on glutamate neurons in the cerebral cortex is one of the pathways that is theoretically linked to psychosis. In addition to neurotransmitter dysfunction, volumetric studies have revealed the loss of cortical gray matter and ventricular enlargement in patients with schizophrenia, although there is no case-control research on patients with schizophrenia to evaluate echogenicity of raphe nuclei (RN) or diameter of the third ventricle (DTV). To address these issues, the present study assessed midbrain RN, as the main source of brain serotonin, and DTV, as an index of atrophy, by transcranial sonography (TCS) in a group of patients with schizophrenia.

Thirty patients with schizophrenia and 30 controls were assessed by TCS for RN echogenicity and DTV. TCS was done through a temporal bone window via a phased-array ultrasound using a 2.5 MHz transducer in a depth of 14-16 cm. RN echogenicity was assessed by a semi-quantitative visual scale and DTV was measured in the thalamic plane.

Twenty-three patients (76.5%) and 15 controls (50 %) showed hypoechogenicity of RN, which was marginally significant (P=0.06). DTV was on average larger in the experimental group (0.388 cm vs 0.234 cm, P<0.001).

Increased DTV in patients with schizophrenia is consistent with previous neuroimaging findings. However, marginally lower echogenicity of midbrain RN on TCS in schizophrenia is a new finding that supports the serotonin hypothesis of schizophrenia.

This study aims to investigate the attitude towards medication, medication adherence, and quality of life (QoL) in outpatients with neurotic disorders referred for the first time to the psychiatric clinic of Tehran Psychiatric Institute in Iran.

In this study, participants were adult outpatients with neurotic disorders referred to the psychiatric clinic of Tehran Psychiatric Institute for the first time, who had met the inclusion criteria (age 18-60 years, having a neurotic disorder diagnosed by the psychiatrist, and consent to participate in the study). At baseline and in one and six months after the first visit, they completed a demographic form, the World Health Organization Quality of Life-BREF (WHOQOL-BREF) and the drug attitude inventory (DAI-10). Their medication adherence was assessed using the medication possession ratio.

Of 100 participants, 76 were females and had a mean age of 35.9 years. Favorable medication adherence significantly increased in the sixth month compared to the first month, and the number of patients with favorable medication adherence increased from 38 to 63. In comparing the overall score of QoL, a significant improvement was observed in the 1st and 6th months compared to baseline and in the sixth month compared to the first month (P<0.001). Regarding the domains of the QoL, mental health and general health in the first and sixth months were significantly increased compared to the baseline (P<0.001). Physical health domain was significantly increased in the sixth month compared to the first month (P<0.001). Social relationships domain was significantly increased in the first month compared to the baseline (P= 0.001). Environmental health domain was significantly increased in the first month compared to the baseline (P=0.019). Comparison of the QoL score between patients with favorable and unfavorable medication adherence showed no significant difference (P=0.6). Attitude towards medication was significantly improved from baseline to the sixth month (P<0.001).

The QoL and its some domains as well as medication adherence and attitude towards medication in outpatients with neurotic disorders seem to be improved after six months of follow-up. There is no significant difference in QoL between outpatients with favorable and unfavorable medication adherence.

Head injury is a silent epidemic in developed countries and is one of the leading causes of death and disability. Determining the precise and early prognosis of head injury, especially in severe cases, is essential and will help define treatment actions and rehabilitation plans and counsel other family members. The purpose of this study was to determine the relationship between electroencephalographic findings and prognosis in patients with decreased levels of consciousness due to head injury.

This is a retrospective descriptive-analytical study on patients with reduced levels of consciousness due to head injury, referred to Tir Hospital (Tehran) in the first half of 2018. Overall, 52 patients were studied and divided according to their GCS into two groups: favorable prognosis (30 patients, 57.7%) and poor prognosis (22 patients, 42.3%). We tried to find the relation between EEG findings such as voltage, electrographic seizures, periodic and rhythmic patterns, and the prognosis.

Normal voltage was associated with a favorable prognosis, with a high specificity (95%) and a less robust sensitivity (63%). The isoelectric voltage (electrocerebral shutdown) was associated with a poor prognosis. Normal and isoelectric voltages were good predictors with 95% and 100% Positive Predictive Values (PPV), respectively. There was a statistically significant relationship between EEG frequency range and prognosis.  

This study showed that EEG parameters might provide valuable data regarding the prognosis of decreased consciousness of patients with a head injury, also for the guidance of physicians and informing the patients’ family.

Carpal tunnel syndrome (CTS) is the most prevalent entrapment syndrome in the upper limbs, for which pregnancy is a known risk factor. CTS diagnosis is confirmed via nerve conduction studies (NCSs), which sometimes is expensive, and the electrical stimulation makes it an unpleasant diagnostic modality, especially for pregnant subjects. Recently, high-frequency ultrasonography (HF-USG) is known as a diagnostic method. This study is concerned with determining the diagnostic value of this modality for CTS among pregnant women.

This cross-sectional case-control study was conducted with 40 CTS cases and 40 matched controls. The HF-USG of wrists was performed bilaterally on all participants with a focus on the median nerve cross-sectional area (MNCSA) at the carpal tunnel (CT) inlet.

Mean MNCSA was statistically different between the CTS group (11.71 ± 1.86 mm2, range: 8 to 18 mm2) and the control group (6.75 ± 1.38 mm2, range: 4 to 11 mm2) (P < 0.001). The receiver operating characteristic (ROC) curve was drawn, and the cross-sectional area (CSA) cut-off point of 8.5 mm2 showed sensitivity and specificity of 98% and 93%, respectively. The positive predictive value (PPV) and the negative predictive value (NPV) were 95% and 98%, respectively, with the mentioned point as the diagnostic threshold.

HF-USG of the median nerve can be utilized as a preferable alternative to NCS (the current gold standard diagnostic method) in pregnant women, due to its convenience and lower cost, or at least, it can be used as a screening tool among pregnant women with suspicious symptoms.

It is well known that stress and glucocorticoid, modulate memory processing, though the result is completely dependent on the time of stress induction. This study investigated the effect of acute corticosterone administration on memory retrieval of recent and remote memory in a 4 trials/day (low- intensity learning) or 8 trials/ day (high- intensity learning) Morris water maze protocol.
Sixty four adult male Wistar rats were used in this research study. Corticosterone was injected subcutaneously (3 mg/kg) 30 min before the probe trial test of Morris water maze. Control animals received the vehicle.
Acute corticosterone, thirty minutes before probe test led to impairment of memory retrieval phase in recent (p
Apparently, learning enhancement was just effective for protecting deleterious effects of corticosterone in recent memory and had no effect on remote memory. Thus, acute stress may impair memory retrieval in a time-dependent manner.