### cell | vegetative cell:

Nerve cell
* All nerve cells have a similar structure
  - the capacity to learn
* Many nerve cells are extremely long compared to their width
  - have receptors that are sensitive to various drugs
* Most nerve cells allow impulses to travel in either direction.
* Some nerve cells have characteristic abnormalities when viewed under a microscope.
* are arranged in the form of a nerve net, as has been pointed out else- where
  - called neurons
  - cells too
  - classic examples of excitable systems though there are chemical ones as well
  - large, complicated, highly specialized cells
  - long and thin
* are one example
  - part of the body's nervous system
  - part of nervous systems
  - quite small
  - scattered in the deeper part of the epidermis adjacent to the mesogloea
  - somatic cells
  - the control centers that send messages to the muscles
  - very long
* attached to the hair cells depolarize from the hair cells.
* can be thinner than the hairs on the head, but they can also be very long
  - become dependent on opiates
  - make new connections and break old ones
  - measure up to two meters in length and are well suited to transmitting messages
  - only utilize glucose as an energy source
  - reach one meter in length
  - send signals without myelin, but the transmission rate is slower
* can use levodopa to make dopamine and replenish the brain's dwindling supply
  - and replenish the brain's reduced supply
  - and replenish the shortfall in the brain
* come in many types.
* communicate by means of chemical messengers called neurotransmitters
  - messages by secreting neurotransmitters
  - through electrical signals termed action potentials
  - to send messages around the body
  - with each other by making many connections with other nerve cells
* consist of a cell body and long attachments, called axons, that conduct nerve impulses.
* contain even more than most cells.
* covered by myelin make up a tissue called white matter.
* die, and areas controlled by the damaged region react
  - resulting in paralysis, speech impediments and other stroke symptoms
* generate electrical signals, that transmit information.
* grow and multiply and connect with one another by way of long extensions called axons.
* grow, connect and start functioning as a brain.
* have an unusually high capacity for regenerating themselves when damaged
  - specialized receptors for receiving neurotransmitted signals
  - to be able to respond to stimulation and to carry signals through the body
* lose the ability to transmit neural signals properly.
* producing beta amyloid seem also to produce more free radicals.
* seem to become vulnerable to stimulation - especially overstimulation.
* send chemical signals to other cells.
* show deformations called neurofibrillary tangles.
* signaling ultimately drives behaviors such as alcohol craving and dependence.
* use L-dopa to regenerate the brain's diminishing supply of dopamine
  - electricity to transmit information
  - it to communicate with one another
  - levadopa to make dopamine, which can then be used by the brain
  - the drug to replenish the brain's dwindling supply of dopamine
* vegetative cell
* work by carrying tiny electrical charges.
* working together are nerve tissue.
+ Electroencephalography: Neurology :: Medical imaging
  * Electroencephalography' is a way to record certain patterns of brain activity, on the skin of the head. Nerve cells use electricity to transmit information. It is one of the methods of diagnosis which can be used for conditions that affect the nerves. An 'electroencephalogram' is a recorded electroencephalography. Electorencephalography is used to detect epilepsy, coma, sleep and brain death. Special adaptations exists to research sleep, for example the length of sleep rhythms. Sleep occurs in different phases, the specially adapted EEG can show the length of these phases.