Locked-In syndrome

Locked-In syndrome

Infobox_Disease
Name = PAGENAME


Caption = Locked-In syndrome can be caused by stroke at the level of the basilar artery denying blood to the pons, among other causes.
DiseasesDB =
ICD10 = ICD10|G|46|3|g|40
ICD9 = ICD9|344.81
ICDO =
OMIM =
MedlinePlus =
eMedicineSubj =
eMedicineTopic =
MeshID = D011782

Locked-In syndrome is a condition in which a patient is aware and awake, but cannot move or communicate due to complete paralysis of nearly all voluntary muscles in the body. It is the result of a brain stem lesion in which the ventral part of the pons is damaged. The condition has been described as "the closest thing to being buried alive". In French, the common term is "maladie de l'emmuré vivant", literally translated as walled-in alive disease; in German it is sometimes called "Eingeschlossensein". [http://www.cnn.com/2007/HEALTH/conditions/12/14/locked.in/index.html?eref=rss_topstories "Scientists seek to help 'locked-in' man speak"] , CNN, 14 December 2007]

Locked-in syndrome is also known as Cerebromedullospinal Disconnection,cite journal |author=Nordgren RE, Markesbery WR, Fukuda K, Reeves AG |title=Seven cases of cerebromedullospinal disconnection: the "locked-in" syndrome |journal=Neurology |volume=21 |issue=11 |pages=1140–8 |year=1971 |pmid=5166219 |doi=] De-Efferented State, Pseudocoma,cite journal |author=Flügel KA, Fuchs HH, Druschky KF |title= [The "locked-in" syndrome: pseudocoma in thrombosis of the basilar artery (author's transl)] |language=German |journal=Dtsch. Med. Wochenschr. |volume=102 |issue=13 |pages=465–70 |year=1977 |pmid=844425 |doi=] and ventral pontine syndrome.

The term for this disorder was coined by Plum and Posner in 1966.cite web |url=http://www.emedicine.com/pmr/topic189.htm |title=eMedicine - Stroke Motor Impairment : Article by Adam B Agranoff, MD |accessdate=2007-11-29 |format= |work=] [Plum F. and Posner J.B. 1966. The diagnosis of stupor and coma. F.A. Davis Co. Philadelphia, Pennsylvania, USA. 197 pp.]

Presentation

Locked-in syndrome results in quadriplegia and inability to speak in otherwise cognitively-intact individuals. Those with locked-in syndrome may be able to communicate with others by coding messages by blinking or moving their eyes, which are often not affected by the paralysis.

Patients who have locked-in syndrome are conscious and aware with no loss of cognitive function. They can sometimes retain proprioception and sensation throughout their body. Some patients may have the ability to move certain facial muscles, most often some or all of the extraocular eye muscles.

Causes

Unlike persistent vegetative state, in which the upper portions of the brain are damaged and the lower portions are spared, locked-in syndrome is caused by damage to specific portions of the lower brain and brainstem with no damage to the upper brain.

Possible causes of locked-in syndrome include:
* Traumatic brain injury
* Diseases of the circulatory system
* Medication overdose
* Damage to nerve cells, particularly destruction of the myelin sheath, caused by disease (e.g. central pontine myelinolysis secondary to rapid correction of hyponatremia).
* A stroke or brain hemorrhage

Treatment

There is no standard treatment for Locked-In syndrome, nor is there a cure. Stimulation of muscle reflexes with electrodes (Neuromuscular stimulation) has been known to help patients regain some muscle function. Other courses of treatment are often symptomatic. [NINDS|lockedinsyndrome]

Assistive computer interface technologies, such as Dasher in combination with Eye tracking may be used to help patients communicate. [http://polishlinux.org/apps/dasher-keyboard-without-keys/]

New direct brain interface mechanisms may provide future remedies. [Parker, I., "Reading Minds," The New Yorker, January 20, 2003, 52-63]

Prognosis

It is extremely rare for any significant motor function to return. The majority of locked-in syndrome patients do not regain motor control, but devices are available to help patients communicate.

Notable case

Parisian journalist Jean-Dominique Bauby had a stroke in 1995, and when he awoke 20 days later he found that his body was almost completely paralyzed: he could control only his left eyelid. By blinking this eye he dictated a letter at a time and in this way he wrote his memoir "The Diving Bell and the Butterfly".cite web |url=http://www.avclub.com/content/cinema/the_diving_bell_and_the |title=The Diving Bell And The Butterfly | The A.V. Club |accessdate=2007-11-29 |format= |work=] The 2007 film "The Diving Bell and the Butterfly" is a film adaptation of Bauby's memoir.

Noted cultural references

* (1868) In Emile Zola's "Thérèse Raquin", Thérèse's aunt Madame Raquin develops locked-in syndrome after a stroke. [cite journal |author=Pearce JM |title=The locked in syndrome |journal=Br Med J (Clin Res Ed) |volume=294 |issue=6566 |pages=198–9 |year=1987 |pmid=3101806 |doi=]
* Dalton Trumbo's 1939 novel "Johnny Got His Gun" features a soldier from the WWI period who suffers horrific injury, losing all of his limbs, eyes, nose, jaws and tongue effectively rendering him similar to one with Locked-In syndrome. He eventually learns to communicate via Morse code by banging his head against a pillow.
* Metallica's 1988 song One, based on the concept presented in "Johnny Got His Gun", deals with a soldier suffering from locked-in syndrome.
* Mark Billingham's "Sleepyhead" | http://www.markbillingham.com/sleepy.html, is a crime thriller with the victims suffering from locked-in syndrome.

References


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Look at other dictionaries:

  • Locked-In Syndrome — Syndrome d enfermement Le Syndrome d enfermement (Appellation anglophone : Locked in syndrome), est un état neurologique rare qui pose un problème médical, économique, mais surtout humain. Le patient est éveillé et totalement conscient, il… …   Wikipédia en Français

  • Locked-in syndrome — Syndrome d enfermement Le Syndrome d enfermement (Appellation anglophone : Locked in syndrome), est un état neurologique rare qui pose un problème médical, économique, mais surtout humain. Le patient est éveillé et totalement conscient, il… …   Wikipédia en Français

  • Locked in syndrome — Syndrome d enfermement Le Syndrome d enfermement (Appellation anglophone : Locked in syndrome), est un état neurologique rare qui pose un problème médical, économique, mais surtout humain. Le patient est éveillé et totalement conscient, il… …   Wikipédia en Français

  • locked-in syndrome — noun (medicine) A neurological condition, resulting from brainstem damage, in which the subject is conscious and aware but unable to move or communicate, other than sometimes through blinking • • • Main Entry: ↑lock …   Useful english dictionary

  • Locked-in syndrome — A neurological disorder characterized by complete paralysis of voluntary muscles in all parts of the body except for those that control eye movement. The locked in syndrome is usually a complication of a cerebrovascular accident (a stroke) in the …   Medical dictionary

  • locked-in syndrome — (LOKT in sin.drohm, drum) n. A rare medical state in which the patient s brain stem has been destroyed, resulting in complete paralysis from the neck down while still maintaining full consciousness and mental activity. Example Citation: Jean… …   New words

  • locked-in syndrome — noun A rare, severe physical disorder in which a person cannot speak and is paralyzed with the possible exception of some voluntary eye movement while his or her mental faculties remain fully intact …   Wiktionary

  • locked-in syndrome — see persistent vegetative state …   The new mediacal dictionary

  • locked-in syndrome — /lɒkt ˈɪn sɪndroʊm/ (say lokt in sindrohm) noun a condition in which a patient has full consciousness but is completely paralysed and thus unable to communicate, except in some cases where the eye muscles are still functioning allowing the… …   Australian-English dictionary

  • Locked-In Syndrome (film) — Pour les articles homonymes, voir Locked In Syndrome. Locked In Syndrome Données clés Titre original Locked In Syndrome Réalisation Emmanuel Caussé Éric Martin …   Wikipédia en Français

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