Johannes Wilhelm Gad (30 June 1842 – 1926) was a German neurophysiologist who was a native of Posen. He was father-in-law to

psychiatrist A psychiatrist is a physician who specializes in psychiatry, the branch of medicine devoted to the diagnosis, prevention, study, and treatment of mental disorders. Psychiatrists are physicians and evaluate patients to determine whether their ...

Oskar Kohnstamm Dr. Oskar Felix Kohnstamm (13 April 1871, in Pfungstadt – 6 November 1917, in Frankfurt am Main) was a German neurologist and psychiatrist. Initially trained in internal medicine in Giessen and Strassbourg he received his doctors degree in ...

(1871-1917).

Life

He was an assistant to

Emil du Bois-Reymond Emil Heinrich du Bois-Reymond (7 November 181826 December 1896) was a German physician and physiologist, the co-discoverer of nerve action potential, and the developer of experimental electrophysiology. Life Du Bois-Reymond was born in Berlin a ...

(1818–1896) at the

physiological Physiology (; ) is the scientific study of functions and mechanisms in a living system. As a sub-discipline of biology, physiology focuses on how organisms, organ systems, individual organs, cells, and biomolecules carry out the chemica ...

institute at the

University of Berlin The Humboldt University of Berlin (german: link=no, Humboldt-Universität zu Berlin, abbreviated HU Berlin) is a public research university in the central borough of Mitte in Berlin, Germany. The university was established by Frederick Will ...

, and later worked under

Adolf Fick Adolf Eugen Fick (3 September 1829 – 21 August 1901) was a German-born physician and physiologist. Early life and education Fick began his work in the formal study of mathematics and physics before realising an aptitude for medicine. He t ...

(1829–1901) at the

University of Würzburg The Julius Maximilian University of Würzburg (also referred to as the University of Würzburg, in German ''Julius-Maximilians-Universität Würzburg'') is a public research university in Würzburg, Germany. The University of Würzburg is one o ...

. In 1893–1894 he was a visiting lecturer of physiology at

Western Reserve University Western may refer to: Places *Western, Nebraska, a village in the US * Western, New York, a town in the US *Western Creek, Tasmania, a locality in Australia * Western Junction, Tasmania, a locality in Australia *Western world, countries that ...

in Cleveland, Ohio, and after returning to Germany, became departmental head at the physiological institute in Berlin. In 1895 he succeeded

Ewald Hering Karl Ewald Konstantin Hering (5 August 1834 – 26 January 1918) was a German physiologist who did much research into color vision, binocular perception and eye movements. He proposed opponent color theory in 1892. Born in Alt-Gersdorf, Ki ...

(1834–1918) as manager of the department of physiology at the University of Prague. Gad is known from his work in experimental physiology. He performed numerous investigations involving

electrophysiology Electrophysiology (from Greek , ''ēlektron'', "amber" Electron#Etymology">etymology of "electron" , ''physis'', "nature, origin"; and , ''-logia'') is the branch of physiology that studies the electrical properties of biological cells and tissu ...

spinal cord The spinal cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column (backbone). The backbone encloses the central canal of the spin ...

functionality, the relationship between

lactic acid Lactic acid is an organic acid. It has a molecular formula . It is white in the solid state and it is miscible with water. When in the dissolved state, it forms a colorless solution. Production includes both artificial synthesis as well as natur ...

to muscle contraction, et al. With

Edward Flatau Edward Flatau (27 December 1868, Płock – 7 June 1932, Warsaw) was a Polish neurologist and psychiatrist. He was a co-founder of the modern Polish neurology, an authority on the physiology and pathology of meningitis, co-founder of medical ...

(1868–1932), he conducted experiments that were critical of Bastian-Bruns Law in regards to the loss of function following

spinal cord injury A spinal cord injury (SCI) is damage to the spinal cord that causes temporary or permanent changes in its function. Symptoms may include loss of muscle function, sensation, or autonomic function in the parts of the body served by the spinal co ...

. Among his written works was a textbook on

human physiology The human body is the structure of a human being. It is composed of many different types of cells that together create tissues and subsequently organ systems. They ensure homeostasis and the viability of the human body. It comprises a head, ...

that he co-authored with

pharmacologist Pharmacology is a branch of medicine, biology and pharmaceutical sciences concerned with drug or medication action, where a drug may be defined as any artificial, natural, or endogenous (from within the body) molecule which exerts a biochemic ...

Jean-François Heymans Jean-François Heymans, also Jan Frans Heymans (25 December 1859, Gooik – 10 April 1932, Middelkerke) was a Belgian pharmacologist and physiologist. He was the father of physiologist Corneille Jean François Heymans. He received his education at ...

, called ''Kurzes Lehrbuch der Physiologie des Menschen'', and a treatise on

skin sensation In physiology, the somatosensory system is the network of neural structures in the brain and body that produce the perception of touch (haptic perception), as well as temperature (thermoception), body position (proprioception), and pain. It is ...

that he published with

Alfred Goldscheider Johannes Karl Eugen Alfred Goldscheider (4 August 1858 – 10 April 1935) was a German neurologist born into a Jewish family in Sommerfeld (today Lubsko, Poland). He studied medicine at Friedrich-Wilhelm Medical-Surgical Institute in Berlin ...

(1858–1935), titled ''Ueber die Summation von Hautreizen''. In 1887, with

Sigmund Exner Sigmund Exner (also ''Sigmund Exner'', ''Siegmund Exner-Ewarten'', ''Siegmund Exner Ritter von Ewarten''; 5 April 1846 – 5 February 1926) was an Austrian physiologist born in Vienna. Academic career He studied in Vienna under Ernst Wilhelm ...

, he founded the periodical ''Centralblatt für Physiologie''.Gad, Johannes - Zeno.org : Pagel: Biographical Dictionary outstanding physicians of the nineteenth century. Berlin, Vienna 1901, Sp. 573-575.

References

* ''Parts of this article are based on a translation of an equivalent article at the

Polish Wikipedia The Polish Wikipedia ( pl, Polskojęzyczna Wikipedia) is the Polish-language edition of Wikipedia, a free online encyclopedia. Founded on September 26, 2001, it now has more than articles, making it the -largest Wikipedia edition overall.

.''
Pagel: Biographical Dictionary
(biography translated from German) {{DEFAULTSORT:Gad, Johannes German physiologists German neurologists 1926 deaths 1842 births Neurophysiologists