Association of pulsatility index with total burden of cerebral small vessel disease and cognitive impairment.

Objective: This study investigated the correlation between the pulsatility index (PI) of the middle cerebral artery with the total burden of cerebral small vessel disease and cognitive impairment.

Method: Information on patients hospitalized in the Department of Neurology was collected retrospectively. These patients had complete clinical and laboratory data.

Neuropsychiatric disorders associated with recreational nitrous oxide use.

Background: Recreational nitrous oxide use has grown in popularity among young people and has become a serious public health problem. Chronic use of nitrous oxide can lead to a functional vitamin B deficiency and neuropsychiatric complications.

Purpose: This study aimed to investigate the characteristics of neuropsychiatric complications associated with nitrous oxide use and to enhance clinicians' awareness of this public health problem.

Purulent meningitis and secondary epilepsy caused by Mycobacterium iranicum infection: A case report.

Mycobacterium iranicum is characterized by rapid growth and orange-pigmented scotochromogenic colonies. However, it is uncommon for M. iranicum to invade the central nervous system.

Case report: Subacute combined degeneration of the spinal cord due to nitrous oxide abuse.

Background: Nitrous oxide (NO) is an increasingly popular recreational drug. NO irreversibly disturbs the metabolism of vitamin B, resulting in a functional deficiency. Vitamin B is vital for myelin synthesis and its deficiency primarily produces neurological complications.