Johann Hoffmann

Johann Hoffmann (1857 – 1919)

Johann Hoffmann (1857 – 1919) was a German neurologist.

Widely regarded as the first ‘pure’ neurologist in Germany

Hoffmann’s interests centred on the spinaI cord and neuromuscular system and he continued the process of differentiation and delineation of the neuromyopathies which had been initiated by his mentors Nikolaus Friedreich (1825 – 1882) Wilhelm Heinrich Erb (1840 – 1921).

Many clinical contributions to neurology include his differentiation of myotonic dystrophy and myotonia congenita; the Hoffmann reflex; and an accurate description of hereditary motor neuropathy type 1, acknowledging the previous report of Werdnig (Werdnig-Hoffmann syndrome);


Biography

  • Born 28 March 1857 Rheinhessen, Germany
  • Medical school, Heidelberg
  • Assistant to Professor Wilhelm Erb in the division of neurology
  • 1910 – Full professor of medicine
  • 1919 – Full professor of neuropathology
  • Died 1 November 1919 Heidelberg, Germany

Medical Eponyms

Hoffmann reflex (1911)

The ‘Hoffmann reflex’ refers to the finger reflex for hyper-reflexia associated with upper motor neuron lesions. [Hoffmann-Tromner reflex]

Sudden release of the flexed distal phalanx of the second, third, or fourth digits leads to flexion of the terminal phalanx of the thumb and of the last two interphalangeal joints of other fingers of that hand in the case of pyramidal tract disease affecting that limb.

Hoffmann discussed this reflex in his teaching and used it in clinical practice, but never published. This reflex was documented in 1911 by his student Hans Curschmann (1875-1950). [Über die diagnostische Bedeutung des Babinskischen Phänomen im präurämischen Zustand. MMW, 1911;58(39): 2054-2057.]

Werdnig–Hoffmann syndrome (1891, 1893)

[Hereditary motor neuropathy type 1; Spinal muscular atrophy type 1] Presents with hypotonia in infancy, with weakness in the limb, intercostal and bulbar muscles. Inheritance is autosomal recessive. The disease was first described in 1891 by Guido Werdnig (1844-1919).

In 1893, Hoffmann wrote an account of ‘chronic familial spinal muscular atrophy’ which he later defined as ‘progressive spinal muscular atrophy’ in 1897. Subsequent descriptions by Sevestre (1899 – Paralysie flasque) and Hermann Oppenheim (1900 – myotonia congenita) led to ‘Werdnig-Hoffmann’ being applied specifically to spinal muscular atrophy

Hoffmann syndrome (1897)

Myopathy in hypothyroidism. Stiffness, slowed contraction/relaxation, and persistent painful muscle contractions following effort. Often associated with muscle hypertrophy in adult hypothyroid patients. [hypothyroid myopathy]


Major Publications


References


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Emergency physician MA (Oxon) MBChB (Edin) FACEM FFSEM with a passion for rugby; medical history; medical education; and informatics. Asynchronous learning #FOAMed evangelist. Co-founder and CTO of Life in the Fast lane | Eponyms | Books | vocortex |

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