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In medicine, Hoffmann's reflex, (aka H-reflex) named after 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. The Hoffman reflex has also been uses as a measure of spinal reflex processing (adaptation) in response to exercise training.
Relation to Babinski sign[edit | edit source]
A positive Babinski sign is considered a pathological sign of upper motor neuron disease except for infants, in whom it is normal. Whereas, a positive Hoffmann's sign can be present in an entirely normal patient. A positive Hoffman's sign in the normal patients is more commonly found in those who are naturally hyper-reflexive (e.g. 3+ reflexes). A positive Hoffmann's sign a worrisome finding of a disease process if its presence is asymmetrical, or has an acute onset.
Another significant difference between Hoffmann's reflex and the Babinski sign are their mechanism of reflex. Hoffman's reflex is a deep tendon reflex (spindle fibre) with a monosynaptic reflex pathway in Rexed lamina IX of the spinal cord. On the other hand, the plantar reflex is not a deep tendon reflex, and its pathway is both more complicated and not fully understood.
See also[edit | edit source]
References[edit | edit source]
- Who Named It synd/1560
- Zehr EP (2002). Considerations for use of the Hoffmann reflex in exercise studies. EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY 86 (6): 455–468. #REDIRECT Template:Doi.
- Walker, Kenneth (1990). Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition., Ch 73: The Plantar Reflex, Boston: Butterworths.
[edit | edit source]
- Cervical Spondylosis: Diagnosis and Management - emedicine.com
- Hoffmann sign - Stedman's Dictionary
-  link of the exam performed with a positive Hoffman's sign
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