Consist of several intertwining loops among the basal ganglia nuclei & thalamic nuclei Striatum (caudate & putamen) is receiver of input to basal ganglia Frontal cortex especially premotor area
Each strand of hair on the human body is at its own stage of development. Once the cycle is complete, it restarts and a new strand of hair begins to form. The rate or speed of hair growth is about 1.25 centimetres or 0.5 inches per month, or about 15 centimetres or 6 inches per year.
The increase in the rate of growth in height begins. Pubic hair begins to appear, usually 6 to 12 months after the start of breast development. About 15% of girls will develop pubic hair before breast development starts. The uterus and vagina, as well as labia and clitoris, increase in size. Pubic hair is well established and breasts grow further. The rate of growth in height reaches its peak by about 2 years after puberty began (average age is 12 years).