scholarly journals The Sweat Glands and Hair Follicles of Different Species of Bovidae

1975 ◽  
Vol 28 (1) ◽  
pp. 55 ◽  
Author(s):  
D Mcewan Jenkinsona ◽  
T Nayb
Keyword(s):  
Hair Follicles ◽  
Sweat Glands ◽  
Hair Density ◽  
Small Primary ◽  
The One

Measurements were made of hairs and sweat glands in the skins of a number of different Bovidae. The principal differences between the Bovinae and the one member of the Cephalophinae (the duiker) studied were in the dimensions of the skin and its component organs and in hair density; secondary hairs were not present, although in the American bison small primary follicles which appeared to provide a woolly undercoat were seen. In contrast, secondary hair foIlicles were found in the skins of all the Caprinae, Antilopinae and most of the Hippotraginae studied. The sweat glands of the Bovidae varied in shape from simple sacs as seen in the oryx to the coiled tubes of the wildebeest, and differed markedly in size, the largest being found in the wisent.

scholarly journals Morphological substantiation of clinical efficacy of platelet rich plasma in males with androgenic alopecia

2018 ◽  
Vol 20 (3) ◽  
pp. 67-71
Author(s):  
E E Pakhomova ◽  
I O Smirnova ◽  
I N Telichko
Keyword(s):  
Clinical Efficacy ◽  
Growth Parameters ◽  
Platelet Rich Plasma ◽  
Hair Follicles ◽  
Androgenetic Alopecia ◽  
Sweat Glands ◽  
Androgenic Alopecia ◽  
Hair Density ◽  
Plasma Therapy ◽  
Four Levels

Morphological substantiation of the clinical efficacy of platelets rich plasma was carried out in the treatment of 22 men with androgenetic alopecia from the 1st to the 4th stage according to the Norwood-Hamilton scale were included. All patients received intradermal injections of platelets rich plasma 0,15 ml per injection. The course of treatment consisted of 4 procedures with an interval of 4 weeks. Clinical efficacy was assessed by the dynamics of morphometric indices of hair growth. Histological examination was carried out on horizontal sections, stained with hematoxylin and eosin, the morphology of the hair was counted at four levels. Evaluation of morphometric growth parameters conducted before treatment and 4 months after the onset of it. It was established that the therapy of platelet-rich plasma has a pronounced clinical efficacy, consisting in a significant (p=0,00025) increase in hair density by 11% and average hair diameter by 10% (p=0,00766), a 14% decrease in the share of hair follicles (p=0,00959). Histologically, the increase in hair density was significant at the level of the bulb of the hair follicles by 148% (p=0,0034) and at the level of the sweat glands by 65% (p=0,0326), and also by the tendency to increase their number at the level of the sebaceous glands. This was combined with a significant decrease in the proportion of telogen hair at 47% (p=0,0153). Thus, the positive clinical effect of plasma-rich plasma therapy in men suffering from androgenetic alopecia is based on reliable morphofunctional changes in the hair follicles.

scholarly journals Comparative evidence for the independent evolution of hair and sweat gland traits in primates

2018 ◽  
Author(s):  
Yana G. Kamberov ◽  
Samantha M. Guhan ◽  
Alessandra DeMarchis ◽  
Judy Jiang ◽  
Sara Sherwood Wright ◽  
...  
Keyword(s):  
Sweat Gland ◽  
Hair Follicles ◽  
Sweat Glands ◽  
Eccrine Gland ◽  
Hair Density ◽  
External Appearance ◽  
Human Feature ◽  
Close Relatives ◽  
Eccrine Sweat Glands ◽  
Eccrine Sweat

AbstractHumans differ in many respects from other primates, but perhaps no derived human feature is more striking than our naked skin. Long purported to be adaptive, humans’ unique external appearance is characterized by changes in both the patterning of hair follicles and eccrine sweat glands, producing decreased hair cover and increased sweat gland density. Despite the conspicuousness of these features and their potential evolutionary importance, there is a lack of clarity regarding how they evolved within the primate lineage. We thus collected and quantified the density of hair follicles and eccrine sweat glands from five regions of the skin in three species of primates: macaque, chimpanzee and human. Although human hair cover is greatly attenuated relative to that of our close relatives, we find that humans have a chimpanzee-like hair density that is significantly lower than that of macaques. In contrast, eccrine gland density is on average 10-fold higher in humans compared to chimpanzees and macaques, whose density is strikingly similar. Our findings suggest that a decrease in hair density in the ancestors of humans and apes was followed by an increase in eccrine gland density and a reduction in fur cover in humans. This work answers longstanding questions about the traits that make human skin unique and substantiates a model in which the evolution of expanded eccrine gland density was exclusive to the human lineage.

scholarly journals The Sweat Glands and Hair Follicles of European Cattle

1972 ◽  
Vol 25 (3) ◽  
pp. 585 ◽  
Author(s):  
D Mcewan Jenkinson ◽  
T Nay
Keyword(s):  
Hair Follicle ◽  
Sweat Gland ◽  
Hair Follicles ◽  
Sweat Glands ◽  
Mean Values ◽  
The Mean ◽  
European Cattle

Measurements were made on the skins of 1363 cattle from different European breeds. The mean values of these measurements have been tabulated for each breed and the skin types present in each breed or group of breeds have been determined using sweat gland shape (LID) and hair follicle depth (FrY) as the principal bases of comparison.

Use of Bromphenol Blue Printing Method for Detecting Sweat on the Palm

1986 ◽  
Vol 11 (1) ◽  
pp. 125-130
Author(s):  
M. SAKURAI
Keyword(s):  
Sensory Nerve ◽  
Sweat Glands ◽  
Bromphenol Blue ◽  
Nerve Function ◽  
Nerve Fibres ◽  
Recovery Stage ◽  
Sympathetic Nerve Fibres ◽  
The Many ◽  
The One ◽  
Printing Method

Sympathetic nerve fibres innervating the sweat glands in the skin are known to accompany sensory nerve fibres closely. Examination of sudorific function, therefore, is a useful aid in making a diagnosis of severed peripheral nerve and also provides valuable information on nerve function in the recovery stage following injury and surgery such as neurorrhaphy. Among the many methods which have been used clinically, the one employing bromphenol blue is thought to be the most simple and accurate.

Differential antigen expression between human eccrine sweat glands and hair follicles/pilosebaceous units

2019 ◽  
Vol 50 (4) ◽  
pp. 335-342 ◽  
Author(s):  
Leilei Cao ◽  
Liyun Chen ◽  
Haihong Li ◽  
Zairong Wei ◽  
Sitian Xie ◽  
...  
Keyword(s):  
Antigen Expression ◽  
Hair Follicles ◽  
Sweat Glands ◽  
Eccrine Sweat Glands ◽  
Eccrine Sweat

scholarly journals Needle Transportable Semi-Automatic Hair Follicle Implanter and Image-Based Hair Density Estimation for Advanced Hair Transplantation Surgery

2020 ◽  
Vol 10 (11) ◽  
pp. 4046
Author(s):  
Tae Wuk Bae ◽  
Yong Chul Jung ◽  
Kyu Hyung Kim
Keyword(s):  
Hair Follicle ◽  
Musculoskeletal Disorders ◽  
Density Estimation ◽  
Hair Follicles ◽  
Pain Tolerance ◽  
Extraction Technology ◽  
Hair Transplantation ◽  
Hair Density ◽  
Transplantation Surgery ◽  
Clinical Experiments

As the number of hair follicles transplanted in a patient is approximately 2000 or more, hair transplantation by a manual implanter requires a considerable amount of time and money and demands a great amount of patience and pain tolerance from both patients and surgeons. In addition, many surgeons frequently experience musculoskeletal disorders owing to the numerous simple repetitive motions of the shoulder and wrist during the procedure. Moreover, the results of the surgery may vary depending on the skill of the surgeon. Although the hair follicle extraction technology has advanced in recent years, the hair follicle transplantation technology still uses a simple hand-held implanter owing to the difficulty of transplanting hair follicles and hair. In this study, a needle transportable semi-automatic hair follicle implanter that can continuously transplant hair follicles is introduced to alleviate the inconvenience of the existing manual implanter. In the developed semi-automatic implanter, a plurality of needles, into which the hair follicles are inserted, are sequentially supplied from the needle supply magazine to the implanter body by the guide groove. The hair follicles in the supplied needles are transplanted to the scalp through the forward and backward movement of the needle gripper and driving motors. The developed implanter can transplant several hair follicles without any replacement, which can shorten surgery time and reduce the fatigue experienced by patients and surgeons. The effectiveness of the proposed implanter was verified through the results of animal and clinical experiments.

Congenital Subgaleal (Epidermoid) Inclusion Cyst of the Anterior Fontanel in a Mexican Female Child: Case Report

Neurosurgery ◽  
1983 ◽  
Vol 12 (4) ◽  
pp. 451-453 ◽  
Author(s):  
Román Garza-Mercado ◽  
Dagoberto Tamez-Montes
Keyword(s):  
Case Report ◽  
Epidermoid Cyst ◽  
Female Child ◽  
Hair Follicles ◽  
Sweat Glands ◽  
Intracranial Extension ◽  
Radical Excision ◽  
Anterior Fontanel ◽  
Inclusion Cyst ◽  
Epidermoid Inclusion Cyst

Abstract A 30-month-old Mexican girl with an inclusion subgaleal cyst located over the anterior fontanel is described. This is the first such case ever diagnosed at our institution and, we believe, the first reported from Mexico. Radical excision of the lesion was accomplished. The internal table of the skull was eroded, but no intracranial extension was noticed. As the cyst contained no hair follicles nor any sebaceous or sweat glands, it was histologically classified as an epidermoid cyst. This is another example of such a lesion in an infant of non-African descent.

Seasonal moulting patterns in three fur bearing mammals: the European badger (Meles meles L.), the red fox (Vulpes vulpes L.), and the mink (Mustela vison). A morphological and histological study

1986 ◽  
Vol 64 (8) ◽  
pp. 1757-1764 ◽  
Author(s):  
Daniel Maurel ◽  
Christian Coutant ◽  
Line Boissin-Agasse ◽  
Jean Boissin
Keyword(s):  
Red Fox ◽  
Histological Study ◽  
Meles Meles ◽  
Hair Follicles ◽  
Way Of Life ◽  
Hair Density ◽  
European Badger ◽  
Anagen Phase ◽  
Phase Differences ◽  
Follicular Activity

Seasonal changes in the fur of three species of mammals at the adult stage, the European badger, the red fox, and the mink, were studied in the field. The badger had only one seasonal change of pelage during the summer and the fall (from July to December), and there was no seasonal variation of hair density. The fox moulted in the spring (between the end of April and the end of August) and again in the fall, but the fall change consisted only in the regrowth of a new fine undercoat that combined with the summer fur to form a denser winter coat. In the mink, the spring and fall moults were very distinct and gave rise to characteristic summer and winter coats that differed in density and number of fine hairs per surface unit. The histological study revealed a similarity in skin composition among the three species, but the relative importance of the different components (sebaceous glands, adipose tissue, keratine layer) varied with each species' way of life. Seasonal follicular activity was correlated with seasonal regrowth of the pelage; the active anagen phase was very long (badger, 5 months; fox, 4 months; mink, 2 months in the spring and 3 months in the fall). During the other part of the annual cycle, telogen, the hair follicles were in a resting phase. Differences in the annual moulting processes between the three species are discussed in terms of adaptive characteristics.[Journal translation]

scholarly journals SURG-08. SUPRASELLAR DERMOID CYST IN A PEDIATRIC PATIENT

2020 ◽  
Vol 22 (Supplement_3) ◽  
pp. iii462-iii462
Author(s):  
Carlos Almeida ◽  
Bruna Minniti Mançano ◽  
Gisele Caravina Almeida ◽  
Gilda D’Agostino Eugui ◽  
Carlos Bezerra Cavalcante
Keyword(s):  
Dermoid Cyst ◽  
Lateral Ventricle ◽  
Brain Magnetic Resonance Imaging ◽  
Radical Resection ◽  
Optic Chiasm ◽  
Hair Follicles ◽  
Sweat Glands ◽  
Subtotal Resection ◽  
High Morbidity ◽  
Left Lateral Ventricle

Abstract BACKGROUND Intracranial dermoid cysts (DC) are rare congenital non-neoplastic lesions that account for 0.04 – 0.6% of all intracranial tumors. They are formed by a fibrous capsule composed of epidermal and dermal derivatives (hair follicles, sebaceous and sweat glands), enclosing a viscous fluid. Intradural DC often arise in the midline and are more common in infratentorial locations. CASE REPORT: A 14-year-old male patient presented with headache, partial motor seizures and behavioral changes. Neurological examination and endocrine workup revealed no abnormalities. Brain magnetic resonance imaging showed a lesion that was 4.4cm x 2.2cm x 4.4cm in size, located at supraselar region, and extended superiorly to the left lateral ventricle and anterolaterally to the left orbitofrontal lobe, associated with hyperintense fat droplets in the right lateral ventricle. We performed a left transventricular microsurgical approach. The tumor capsule was coagulated and opened and a subtotal resection with peacemeal removal of the the lesion was obtained: it had gelatinous consistency, composed of droplets of fat and hair and keratinized scamous epihelium content. A total removal of the DC capsule was not possible due to its firm adherence to optic chiasm and to hypothalamus. Histological examination revealed dermoid cyst. CONCLUSION Surgery is the only effective treatment, and its goal should be the radical resection of the lesion to avoid recurrence. Whenever radical resection is not possible, because of the adhesions of the cyst capsule to surrounding tissues, a subtotal resection with piecemeal removal may be a satisfactory option in such cases to avoid high morbidity.

YKL-40 expression in naevocellular naevi, carcinomas and melanomas of the skin

2006 ◽  
Vol 24 (18_suppl) ◽  
pp. 18019-18019 ◽  
Author(s):  
H. Schmidt ◽  
A. Roslind ◽  
J. S. Johansen ◽  
D. L. Nielsen ◽  
P. A. Price ◽  
...  
Keyword(s):  
Tumor Cells ◽  
Squamous Cell ◽  
Normal Skin ◽  
Elevated Serum ◽  
Serum Levels ◽  
Tissue Expression ◽  
Hair Follicles ◽  
Squamous Cell Carcinomas ◽  
Sweat Glands ◽  
Invasive Tumor

18019 Background: Elevated serum levels of the protein YKL-40 are associated with a poor prognosis in several solid tumors including melanoma (H. Schmidt, JCO 2006, Cancer 2006 in press). YKL-40 is secreted by cancer cells, macrophages and neutrophils. The function of YKL-40 is only poorly understood. It may be a growth or differentiation factor, play a role in angiogenesis or protect against apoptosis. The aim was to describe the tissue expression of YKL-40 in naevocellular naevi, carcinomas and melanomas of the skin by immunohistochemistry. Methods: Paraffin-embedded tissue sections from 40 patients with different naevocellular naevi, carcinomas and melanomas of the skin were developed with EnVision+ System-HRP K4007 (DakoCytomation) using a monoclonal antibody against YKL-40. The intensity of YKL-40 staining was scored using a semi-quantitative method. Results: YKL-40 protein expression appeared as a cytoplasmic, granular staining with no staining of membranes, nuclei or extracellular matrix. In normal skin the basal epithelial layer stained weakly positive. Melanocytes and melanophages stained negative. Macrophages and leucocytes stained positive. Hair follicles, sebaceous glands and sweat glands stained positive. Three basal cell carcinomas all stained positive. In 10 squamous cell carcinomas, the epidermal components stained positive and the invasive tumor islands were negative. In 3 keratoacanthomas, the epithelial components as well as the infiltrative tumor islands stained positive. In naevi (2 junctional, 5 compound and 1 intradermal) the epithelial components stained positive, the intradermal components stained negative. In melanomas the tumor cells stained positive in 9 of 10 specimens. Both the epidermal and the invasive components of melanomas stained positive. Three melanoma metastases all stained positive. Conclusions: YKL-40 is expressed in normal skin and in benign and malignant lesions of the skin. Generally, YKL-40 expression is increased in cells of high activity, although the invasive tumor islands of squamous cell carcinomas stain negative. In melanomas, the tumor cells may be a source of the elevated YKL-40 serum levels observed in these patients. No significant financial relationships to disclose.

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