The fall of hair
As the causes of hair loss are very numerous, we will cover the most common causes.
Statistics show that 95% of hair loss types are caused by a progressive condition called Androgenetic Alopecia or popularly called “baldness,” or also as “hereditary decline.” People notice that they have abnormal hair loss when they see a large number of yarns on the comb or brush, on the bath, on the pillow and loose on the clothes. Or they notice a decrease in volume in specific areas of the scalp. In this case the best course is to seek a dermatologist who will assess which problem is affecting the hair.
Questions about regimens, medications, recent illnesses, how to handle hair, chemicals, stress, emotional disturbances and family history of hair loss are some of the points the doctor will evaluate. In addition, in the woman, information regarding menstrual cycle, pregnancy and menopause are researched.
For an accurate diagnosis, clinical evaluation is the most important, but sometimes there is a need for complementary tests. Examination of the hair by means of a device, the Tricoscan, can be accompanied by the patient in the computer, or else this hair can be sent to the USA where an examination is carried out called a mineralogram that checks possible changes in the organism. Laboratory tests of hormones, blood, urine and feces may also be ordered. In some cases the diagnosis, through scalp biopsy.
The pilosebaceous unit comprises the hair follicle, the piloerector muscle and the sebaceous gland. In a longitudinal section, we can distinguish different portions that, from the surface to the deep part, are denominated: infundibulum (from the pore to the opening of the sebaceous gland), isthmus (between the gland and the insertion of the erector muscle of the hair ), The rod and the bulb. The latter two are the permanent portions of the hair while the others are modified during the hair growth cycle.
The activity of each follicle is individual and goes through three successive phases:
1) growth or anagen: the hair is growing because the cells divide and keratinize actively.
2) involution, or catagen: As the catagen phase approaches, the distal portion dilates and the hair is surrounded by a thick, rough vitreous membrane that forms part of the follicular connective tissue sheath.
3) hair detachment, or telogen: the telogen phase has a duration of up to three months. In this phase the weakening of the union between the base of the follicle and the fall occurs. Under normal conditions, approximately 10% of head hairs are in the telogen phase.
The shape of the hair varies from one individual to another and even from one area of the head to another. Smooth, curly, curly, beaded hair … The shape and color of hair are genetically programmed. Ethnic origin also influences the character of hair.
Thickness: It varies from thin, medium and thick and the volume of a wig weighs about 300 to 400 grams.
Resistance and elasticity: are determined by the thickness of the hair. Only 1/3 of the length of the wire has elasticity.
Composition: Keratin is an essential hair compound. This protein is rich in sulfur containing a large number of amino acids: cystine, lysine, arginine, leucine, tryptophan, histidine … Blonde hair is rich in sulfur and brown hair in carbon.
Color: It results from the synthesis of a pigment called melanin. The electronic microscopic examination allows to distinguish the amount of melanin points that give the lighter color or esucra to the hair. There are seven colors of natural pigments that according to their proportions determine the color of the hair.
Physiological Role: It is variable and serves as an important route of elimination of toxic elements of the organism: lead, arsenic, mercury ….
50% Carbon (found in diamonds)
20% oxygen (ambient air)
17% nitrogen (used to make dynamite)
6% hydrogen (volcanic stones / lava)
5% sulfur (powder)
2% other elements
Amount of hair on the head
Blondes: about 140,000 yarns
Brown: about 110,000 yarns
Blacks: about 108,000 wires
Reds: about 90,000 yarns
Types of hair
Lanugem: occurs on the skin even in the womb or in newborns.
Velus: thin, short wires, not very pigmented at birth. They turn into terminal hair with age or a terminal reduces to velus (miniaturization).
Terminal: thick and long. In children it occurs only in the scalp, eyebrows and cymbals. In adults, it develops in other parts of the body.