The Human Nervous System. Major Organs Brain, Spinal Chord, Nerves. Major functions. Sensory Millions of sensory receptors detect changes, called stimuli, which occur inside and outside the body. Integration Decisions that are made based on the sensory input. Motor
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All neurons have 3 main parts:
1. Dendrites receive information from another cell and transmit the message to the cell body.
2. The cell body contains the nucleus, mitochondria and other organelles typical of eukaryotic cells
3. The axon conducts messages away from the cell body.
Haemophilus influenzae , Streptococcus neumoniae, group B Streptococcus, Listeria monocytogenes, and Neisseria meningitidis can all cause meningitis. Symptoms include brain damage, hearing loss, learning disabilities and possible death. It is spread through secretions, air and contaminated food.
Rabies is spread by infected saliva that enters the body through a bite or broken skin. The virus travels from the wound to the brain, where it causes swelling, or inflammation, and if untreated…death
Clinical Neurophysiology- A neurologist who specializes in the diagnosis and management of central, peripheral, and autonomic nervous system disorders using a combination of clinical evaluation and electrophysiologic testing such as electroencephalography (EEG), electromyography (EMG), and nerve conduction studies (NCS), among others.
Pain Medicine - provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic or cancer pain in both hospital and ambulatory settings.Career Opportunities
Nicotine causes the nervous system to become more sensitive & stimulated. This leads to short term effects:
Long-term effects of smoking on the nervous system are quite dangerous. People who smoke are more susceptible to cancers and muscular sclerosis.
Anabolic Steroids have
many effects on many
different organ systems. For the nervous system, steroids cause an increase in aggression ~ “Roid Rage”, irritability and severe fluctuation in moods. Users can also develop a dependency on this drug ~ they can become addicted. Users are also at an increased risk of committing suicide because of severe depression caused by steroid use.
Alcohol has profound effects on neurons and the nervous system. Alcohol:
encephalopathy and clinical
Methamphetamine is a
stimulant that causes actual physical changes to the brain. It effects the level of dopamine in the brain and is highly addictive.
Stimulants will increase the activity of the Central Nervous System
Anxiety, confusion, insomnia, depression and mood disturbances and displays of violent behavior are common with “meth” use.
Psychotic episodes are prevalent, such as paranoia, hallucinations and delusions.