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Hoffmann's reflex (Hoffmann's sign, sometimes simply Hoffmann's, or finger flexor reflex) [1] is a neurological examination finding elicited by a reflex test which can help verify the presence or absence of issues arising from the corticospinal tract. It is named after neurologist Johann Hoffmann. [2]
The H-reflex (or Hoffmann's reflex) is a reflectory reaction of muscles after electrical stimulation of sensory fibers (Ia afferents stemming from muscle spindles) in their innervating nerves (for example, those located behind the knee).
Hering–Breuer reflex — is a reflex triggered to prevent over-inflation of the lung; Hoffmann's reflex — also known as the finger flexor reflex; middle finger and thumb response. Test can indicate both neurological damage and nerve regeneration; often combined with the Babinski reflex test. Jaw jerk reflex
Neural adaptations contribute to changes in V-waves and Hoffmann's reflex. H-reflex can be used to assess the excitability of spinal α-motoneurons, whereas V-wave measures the magnitude of motor output from α-motoneurons.
The Hoffmann's reflex is sometimes described as the upper limb equivalent of the Babinski sign [12] because both indicate upper motor neuron dysfunction. Mechanistically, they differ significantly; the finger flexor reflex is a simple monosynaptic spinal reflex involving the flexor digitorum profundus that is normally fully inhibited by upper ...
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At center, from left: Kang Wang, Kathryn Lewek and Emily Fons, along with the Palm Beach Opera Chorus, in a scene from Offenbach's "The Tales of Hoffmann," at Palm Beach Opera.
Johann Hoffmann (1857-1919) Johann Hoffmann (28 March 1857 – 1 November 1919) was a German neurologist born in Hahnheim. He is remembered for describing Hoffmann's reflex and Werdnig–Hoffmann disease (now spinal muscular atrophy type 1). He is also known for the adult-onset hypothyroid myopathy, Hoffmann syndrome. [1]