Parkinson's disease (PD) is one of the most common neurodegenerative disorders, characterized by a symptom triad comprising resting tremor, rigidity, and akinesia. In addition, non-motor symptoms of PD are well recognized and often precede the overt motor manifestations. Cutaneous manifestations as markers of PD have long been discussed, and cumulative evidence shows an increased prevalence of ...

Senile graying of human hair has been the subject of intense research since ancient times. Reactive oxygen species have been implicated in hair follicle melanocyte apoptosis and DNA damage. Here we show for the first time by FT-Raman spectroscopy in vivo that human gray/white scalp hair shafts accumulate hydrogen peroxide (H(2)O(2)) in millimolar concentrations. Moreover, we demonstrate almost ...

Consumers use different hair care products to change the physical appearance of their hair, such as shampoos, conditioners, hair dye and hair straighteners. They expect cosmetics products to be available in the market to meet their needs in a broad and effective manner. Evaluating efficacy of hair care products in vitro involves the use of highly accurate equipment. This review aims to discuss ...

Ultrasonography is an accurate and accessible method for detecting polycystic kidney disease (PKD), an inherited autosomal dominant disease, and other urinary tract diseases. The present work is a preliminary study of PKD and urinary tract abnormalities using ultrasonography in Persian and other long hair cats in Iran. This study was conducted on 83 cats including 68 Persian cats and 15 Persian...

BACKGROUND In recent years, there has been a shift toward minimally invasive procedures. In hair transplantation surgery, this trend has manifested with the emergence of follicular unit extraction (FUE). Recently, a robot has been introduced for FUE procedures. OBJECTIVE To determine the transection rate of a robotic FUE device. MATERIALS AND METHODS The authors discuss the procedure, techn...

Several skin conditions are more common in persons with skin of color, including dermatosis papulosa nigra, pseudofolliculitis barbae, acne keloidalis nuchae, and keloids. Dermatosis papulosa nigra is a common benign condition characterized by skin lesions that do not require treatment, although several options are available for removal to address cosmetic concerns. Pseudofolliculitis barbae oc...

A technique for modeling fur, but not long human hair, quickly using the facilities of common graphics workstations is described. The user selects a variety of parameters to achieve the desired appearance for a particular animal, such as hair density, length, stiffness, and color properties. Undercoat and overcoat may have separate specifications, and degrees of randomness may be specified, for...

this cross sectional study was carried out between 1993 to 1998 at razi skin hospital, the affiliated dermatology department of tehran university of medical sciences. eight hundred patients receiving etretinate for various skin diseases took part in this study. among them, 457 patients with first admission to dermatologic clinic who had at least four regular sequential visits and responding to ...

Texture is an intuitive concept Every child knows that leopards have spots but tigers have stripes that curly hair looks di erent from straight hair etc In all these examples there are variations of intensity and color which form certain repeated patterns called visual texture The patterns can be the result of physical surface properties such as roughness or oriented strands which often have a ...

Hairline correction surgery is an advanced form of hair transplantation and is performed substantially for Korean females with a flat, broad face and prominent zygoma. However, this procedure demands a considerable learning curve in order to acquire natural results because Koreans have coarse hairs and there is a strong contrast in color between their skin and hair color. As a result, quite a f...