Neurological disorders

Neurology is a branch of medicinedealing with the nervous system and its disorders. Physicians specializing in the field of neurology are called neurologists. Surgery on the nervous system is performed by physicians with specialized training - neurosurgeons, and, in some cases, interventional neuroradiologists.

Field of work

Neurological disorders are disorders that affect the central nervous system(brain, brainstemand cerebellum), the peripheral nervous system(peripheral nerves- cranial nerves) included), or the autonomic nervous system(parts of which are located in both central and peripheral nervous system).

Major conditions include:

• headache disorderssuch as migraineand tension headache(cluster headache)
• epilepsyand seizuredisorders
• neurodegenerative disorders, the most common class being dementias, including Alzheimer's disease
• cerebrovascular disease, such as transient ischemic attacks, and strokes(ischemicor hemorrhagic)
• sleep disorders
• cerebral palsy
• bacterial, fungal, viraland parasiticinfectionsof the central nervous system (encephalitis), brain envelopes (meningitis) and peripheral nerves (neuritis), such as brain abscess, herpetic meningoencephalitis, aspergilloma, cerebral hydatic cyst, tetanus, botulism
• neoplasms- tumorsof the brainand its envelopes (brain tumors), spinal cordtumors, tumorsof the peripheral nerves(neuroma)
• movement disorderssuch as Parkinson's disease, chorea, hemiballismus, tic disorder, and Gilles de la Tourette syndrome
• demyelinating diseasesof the central nervous system, such as multiple sclerosis, and of the peripheral nervous system, such as Guillain-Barré syndromeand chronic inflammatory demyelinating polyneuropathy(CIDP)
• spinal corddisorders - tumors, infections, trauma, malformations(e.g., myelocele, meningomyelocele, tethered cord)
• disorders of peripheral nerves, muscleand neuromuscular junctions
• traumatic injuries to the brain, spinal cordand peripheral nerves
• Altered mental status, encephalopathy, stupor and coma

Clinical tasks

General caseload

Neurologists are responsible for diagnosing and treating all of the above conditions, except for surgical interventions, which fall into the responsibility of neurosurgeons, and in some cases interventional neuroradiologists. In some countries, additional legal responsibilities of a neurologist include making a finding of brain deathwhen it is suspected that a patientis deceased, and filing the necessary paperwork for issuance of a death certificate. Neurologists are also called on to certify brain deathin the cases of organ donors. Neurologists frequently care for people with hereditary (genetic) disease when the major manifestations are neurologic, as is frequently the case.

Neurologists may specialize in clinical neurophysiology, the field responsible for electroencephalography(EEG), nerve conduction studies(NCS) and electromyography(EMG). The interpretation of such evoked potentials such as somatosensory evoked potentials(SSEP), visual evoked potentials(VEP) and brainstem auditory evoked response(BAER) also falls under the domain of neurophysiology. Other neurologists may develop an interest in particular subfields, such as the movement disorders, headaches, epilepsyor neuromuscular disease.

Diagnostic lumbar puncturesare frequently performed by neurologists.

Overlap with psychiatry

Although many mental illnessesare believed to be neurological disorders affecting the central nervous system, traditionally they are classified separately, and treated by psychiatrists. In a 2002 review article in the American Journal of Psychiatry, Professor Joseph B. Martin, Dean of Harvard Medical Schooland a neurologist by training, wrote that 'the separation of the two categories is arbitrary, often influenced by beliefs rather than proven scientific observations. And the fact that the brain and mind are one makes the separation artificial anyway.' (Martin JB. The integration of neurology, psychiatry and neuroscience in the 21st century. Am J Psychiatry 2002; 159:695-704)

There are strong indications that neuro-chemical mechanisms play an important role in the development of, for instance, bipolar disorderand schizophrenia. As well, 'neurological' diseases often have 'psychiatric' manifestations, such as post-strokedepression, depression and dementiaassociated with Parkinson's disease, mood and cognitive dysfunctions in Alzheimer's disease, to name a few. Hence, there is no sharp distinction between neurology and psychiatryon a biological basis - this distinction has mainly practical reasons and strong historical roots (such as the dominance of Freud's psychoanalytic theoryin psychiatric thinking in the first three quarters of the 20th century - which has since then been largely replaced by the focus on neurosciences- aided by the tremendous advances in geneticsand neuroimagingrecently.)

See also

• History of neurology
• List of neurological disorders
• List of neurologists
• Clinical neurophysiology
• Neuropsychiatry
• Psychiatry
• Neuroendocrinology

External links

• American Academy of Neurology
• brainblog: news about our knowledge of the brain and behavior.
• Journal Watch Neurology: collection of the most important neurology studies for practicing clinicians, summarized and with commentary.

da:Neuromedicin de:Neurologie el:?????????? es:Neurología fr:Neurologie ga:Néareolaíocht it:Neurologia he:?????????? lt:Neurologija nl:Neurologie ja:??? no:Nevrologi pl:Neurologia pt:Neurologia sv:Neurologi tr:Nöroloji zh:???

This article is licensed under the GNU Free Documentation License.
It uses material from the http://en.wikipedia.org/wiki/Neurological+disorders Wikipedia article Neurological disorders.