The Nervous system is an internal communication system, relaying signal with short electrical impulses. The central nervous system is composed of the brain and spinal cord. The peripheral nervous system extends to all other parts of the body. Health problems related to the nervous system include stress, insomnia, depression, nervous disorders, headaches and multiple sclerosis. click here to read full article
huntington's disease nervous system
what is Huntington disease ? it is shortly called HD and it is a genetic disorder of the central nervous system with symptoms usually appearing in adults within the third or fourth decade of life, although symptoms can occur in individuals younger or older than this.
Within the same family, the symptoms vary both in their rate of progression and in the age of onset. Symptoms may include involuntary movements and loss of motor control. In addition, personality changes may occur, with loss of memory and decreased mental capacity. Symptoms in individuals, as well as confirmation of diagnosis in other family members, are used to determine the diagnosis.
Huntington disease is inherited as an autosomal dominant condition.
interesting facts about brain
A newborn baby's brain grows almost 3 times during the course of its first year.
The left side of human brain controls the right side of the body and the right side of the brain controls the left side of the body. The total surface area of the human brain is about 25, 000 square cm. Only four percent of the brain's cells work while the remaining cells are kept in reserve. There are about 13, 500,00 neurons in the human spinal cord. As we get older, the brain loses almost one gram per year. The base of the spinal cord has a cluster of nerves, which are most sensitive.
An average adult male brain weighs about 1375 grams and for female brain is about 1275 grams.
Sense organs
The sense organs are highly specialized structures that receive information from the environment. Sense organs contain special sense receptors ranging from complex structures, such as eyes and ears, to small localized clusters of receptors, such as taste buds and olfactory epithelium. Smell and taste are chemical senses, which contain chemoreceptors that respond to chemicals in solution. Food chemicals dissolved in saliva stimulate taste receptors in taste buds. The nasal membranes produce fluids that dissolve chemicals in air. These chemicals stimulate smell receptors in olfactory epithelium. The chemical senses complement each other and respond to many of the same stimuli.
Subscribe to:
Posts (Atom)
