Pattern hair loss by age 50 affects about half of men and a quarter of women. About 2% of people develop alopecia areata at some point in time. Terminology
Baldness is the partial or complete lack of hair growth, and part of the wider topic of "hair thinning". The degree and pattern of baldness varies, but its most common cause is androgenic hair loss, alopecia androgenetica, or alopecia seborrheica, with the last term primarily used in Europe. Hypotrichosis
Hypotrichosis is a condition of abnormal hair patterns, predominantly loss or reduction. It occurs, most frequently, by the growth of vellus hair in areas of the body that normally produce terminal hair. Typically, the individuals hair growth is normal after birth, but shortly thereafter the hair is shed and replaced with sparse, abnormal hair growth. The new hair is typically fine, short and brittle, and may lack pigmentation. Baldness may be present by the time the subject is 25 years old. Signs and symptoms
Symptoms of hair loss include hair loss in patches usually in circular patterns, dandruff, skin lesions, and scarring. Alopecia areata (mild – medium level) usually shows in unusual hair loss areas, e.g., eyebrows, backside of the head or above the ears, areas the male pattern baldness usually does not affect. In male-pattern hair loss, loss and thinning begin at the temples and the crown and hair either thins out or falls out. Female-pattern hair loss occurs at the frontal and parietal. People have between 100,000 and 150,000 hairs on their head.
The work of Joaquin Farias has shown that sensorimotor retraining activities and proprioceptive stimulation can induce neuroplasticity, making it possible for patients to recover substantial function that was lost due to blepharospasm.Developed by The Eye Research Group Oxford, PressOp™ is a new ethically approved spectacle mounted device that arose after studying individuals with Blepharospasm who regularly use “sensory tricks”. By applying pressure to the temple region of their forehead patients found this helped to enable eye opening. The device is particularly helpful controlling an episode of severe spasm when the carrying out of specific tasks is necessary. Blepharospasm sufferers may find continuity in their quality of life by using the device while effectiveness of treatment is not at its peak. See also
Levator palpebrae superioris muscle
Myokymia
Fasciculation

References
External links

Blepharospasm – Resource Guide from the National Eye Institute (NEI)