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m (Hoffmann's sign moved to Hoffmanns reflex: Align thesaurus)
 
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{{BioPsy}}
 
{{BioPsy}}
   
In [[medicine]], '''Hoffmann's sign''', named after the German [[neurologist]], [[Johann Hoffmann]] (born [[1857]], Rheinhesse; died [[1919]], Heidelberg), is a finding elicited by a [[reflex]] test which verifies the presence or absence of problems in the [[corticospinal tract]]. It is also known as the '''finger flexor reflex'''.
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In [[medicine]], '''Hoffmann's sign''', named after the [[Germany|German]] [[neurologist]], [[Johann Hoffmann]]<ref>{{WhoNamedIt|synd|3740}}</ref><ref>P. Hoffmann. Über eine Methode, den Erfolg einer Nervennaht zu beurteilen. Medizinische Klinik, March 28, 1915b, 11 (13): 359-360.</ref> (born 1857, Rheinhesse; died 1919, Heidelberg), is a finding elicited by a [[reflex]] test which verifies the presence or absence of problems in the [[corticospinal tract]]. It is also known as the '''finger flexor reflex'''.
   
 
The test involves tapping the nail or flicking the terminal [[Phalanx bones|phalanx]] of the third or fourth finger. A positive response is seen with flexion of the terminal phalanx of the [[thumb]].
 
The test involves tapping the nail or flicking the terminal [[Phalanx bones|phalanx]] of the third or fourth finger. A positive response is seen with flexion of the terminal phalanx of the [[thumb]].
   
It is often considered the [[upper limb]] equivalent of the [[Babinski's sign]] because it, like the Babinski sign, indicates [[upper motor neuron]] dysfunction.{{ref|NYUSM}} Mechanistically, it differs considerably from the Babinski or [[plantar reflex]]; Hoffman's sign involves a monosynaptic reflex pathway in [[Rexed lamina]] IX of the [[spinal cord]], normally fully inhibited by descending input. The pathways involved in the plantar reflex are more complicated, and different sorts of lesions may interrupt them. This fact has led some neurologists to reject strongly any analogies between the finger flexor reflex and the plantar response.
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==Relation to Babinski sign==
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Hoffmann's sign is often considered the [[upper limb]] equivalent of the [[Babinski's sign]]<ref>{{cite journal |author=Harrop JS, Hanna A, Silva MT, Sharan A |title=Neurological manifestations of cervical spondylosis: an overview of signs, symptoms, and pathophysiology |journal=Neurosurgery |volume=60 |issue=1 Supp1 1 |pages=S14–20 |year=2007 |pmid=17204875 |doi=10.1227/01.NEU.0000215380.71097.EC}}</ref> because it, like the Babinski sign, indicates [[upper motor neuron]] dysfunction.<ref>[[New York University]] School of Medicine. Deep Tendon Reflexes. URL: [http://endeavor.med.nyu.edu/neurosurgery/reflexes.html http://endeavor.med.nyu.edu/neurosurgery/reflexes.html]. Accessed November 27, 2005.</ref> Mechanistically, it differs considerably from the Babinski which is also known as the [[plantar reflex]]; Hoffmann's sign involves a monosynaptic reflex pathway in [[Rexed lamina]] IX of the [[spinal cord]], normally fully inhibited by descending input. The pathways involved in the plantar reflex are more complicated, and different sorts of lesions may interrupt them. This fact has led some neurologists to reject strongly any analogies between the finger flexor reflex and the plantar response.
   
 
==References==
 
==References==
#{{note|NYUSM}}New York University School of Medicine. Deep Tendon Reflexes. URL: [http://endeavor.med.nyu.edu/neurosurgery/reflexes.html http://endeavor.med.nyu.edu/neurosurgery/reflexes.html]. Accessed November 27, 2005.
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{{reflist|2}}
   
 
==See also==
 
==See also==
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*[http://www.emedicine.com/NEURO/topic564.htm Cervical Spondylosis: Diagnosis and Management] - emedicine.com
 
*[http://www.emedicine.com/NEURO/topic564.htm Cervical Spondylosis: Diagnosis and Management] - emedicine.com
 
*[http://www.emedicine.com/asp/dictionary.asp?exact=Y&keyword=Hoffmann+sign Hoffmann sign] - Stedman's Dictionary
 
*[http://www.emedicine.com/asp/dictionary.asp?exact=Y&keyword=Hoffmann+sign Hoffmann sign] - Stedman's Dictionary
*{{WhoNamedIt|synd|3740}}
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*[http://depts.washington.edu/neurosur/spine_center/images/hoffman-1.mov] link of the exam performed with a positive Hoffman's sign
   
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[[Category:Reflexes]]
   
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[[fr:Signe de Hoffman]]
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{{enWP|Hoffmann's sign}}
 
{{enWP|Hoffmann's sign}}

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In medicine, Hoffmann's sign, named after the German neurologist, Johann Hoffmann[1][2] (born 1857, Rheinhesse; died 1919, Heidelberg), is a finding elicited by a reflex test which verifies the presence or absence of problems in the corticospinal tract. It is also known as the finger flexor reflex.

The test involves tapping the nail or flicking the terminal phalanx of the third or fourth finger. A positive response is seen with flexion of the terminal phalanx of the thumb.

Relation to Babinski signEdit

Hoffmann's sign is often considered the upper limb equivalent of the Babinski's sign[3] because it, like the Babinski sign, indicates upper motor neuron dysfunction.[4] Mechanistically, it differs considerably from the Babinski which is also known as the plantar reflex; Hoffmann's sign involves a monosynaptic reflex pathway in Rexed lamina IX of the spinal cord, normally fully inhibited by descending input. The pathways involved in the plantar reflex are more complicated, and different sorts of lesions may interrupt them. This fact has led some neurologists to reject strongly any analogies between the finger flexor reflex and the plantar response.

ReferencesEdit

  1. Who Named It synd/3740
  2. P. Hoffmann. Über eine Methode, den Erfolg einer Nervennaht zu beurteilen. Medizinische Klinik, March 28, 1915b, 11 (13): 359-360.
  3. Harrop JS, Hanna A, Silva MT, Sharan A (2007). Neurological manifestations of cervical spondylosis: an overview of signs, symptoms, and pathophysiology. Neurosurgery 60 (1 Supp1 1): S14–20.
  4. New York University School of Medicine. Deep Tendon Reflexes. URL: http://endeavor.med.nyu.edu/neurosurgery/reflexes.html. Accessed November 27, 2005.

See alsoEdit

External linksEdit


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