While deep tendon reflexes involve a single connection between afferent and efferent neurons (i.e., a monosynaptic reflex), the expression of a deep tendon reflex requires additional spinal connections.
Determining how many hairs are lost from the average human body in a typical day can be difficult, however. Some experts believe daily hair loss of between 50 and 100 hairs can be considered normal, while others say up to 200 hairs may be lost on average per day. Anything above the 200 hairs per day mark, however, should be considered excessive. There are many myths surrounding what is normal in regards to hair loss. Within the standard measurement, the rate of hair loss can vary based on your age as well as genetic influences.
Most people normally shed 50 to 100 hairs a day. This usually doesn't cause noticeable thinning of scalp hair because new hair is growing in at the same time. Hair loss occurs when this cycle of hair growth and shedding is disrupted or when the hair follicle is destroyed and replaced with scar tissue. The exact cause of hair loss may not be fully understood, but it's usually related to one or more of the following factors: Family history (heredity) The most common cause of hair loss is a hereditary condition called male-pattern baldness or female-pattern baldness. It usually occurs gradually and in predictable patterns â a receding hairline and bald spots in men and thinning hair in women.