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Efrén C. del Pozo

Efrén Carlos del Pozo Rangel, Mexican physiologist and pharmacologist (San Luis, Potosí 11 September 1907 – Ciudad de Mexico 14 May 1979)

Authored over 50 papers

Discovered that newborn animals don’t display reflex palsy immediately after spinal cord lesions

With C. Guzmán, A. Fernandez & J. Negrete. El choque espinal en gatos jóvenes. Bol. Inst. Estud. Med. Biol. Mex. 12(7):169-72, 1954


Pharmacology of venoms of Mexican Centruroides. Rev. Invest. Salud Publica 28(1):51-66, 1968 & Mem. Inst. Butantan 33(2):615-25, 1966

With M. Salas & P. Pacheco. Effects of scorpion venom at neuromuscular junction. Rev. Invest. 33(3):961-4, 1966

Los effectos paralizantes de la “tullidora”, estudios clinicos y experimentales. Gac. Med. Mex. 95(2):179-82, 1965

La botânica medicinal indígena de Mexico. Estudios Cult. Nahuatl. 5:57-73, 1965

With C. Guzmán & F. del Pozo. Jump reflex in the hypothalamic cat. J. Neurophysiol. 16(4):376-80, 1953 

With J. Negrete. Effect of adrenalectomy on the contraction of skeletal muscle. Rev. Inst. Salub. Enferm. Trop. 13(2):163-8, 1953

With J. Negrete, J. Ibarra & M. Fernandez. Effects of cortisone on striated muscle contraction. Amer. J. Physiol. 171(2):354-8, 1952

With A. Gonzalez Ochoa. Two cases of prevention and treatment of lepra reaction by cortisone. J. Invest. Dermat. 18:423-4, 1952

With E.G. Pardo & D. García-Tellez. The action of several principles and extracts of the digitalis group on ischemic skeletal muscle. J. Pharmacol. Exp. Ther. 101:63-7, 1951

With E.G. Pardo. Ischemic striated muscle as an indicator of the activity of a cardiac glycoside.  J. Pharmacol. Exp. Ther. 97(2):144-9, 1949

With E.G. Pardo & G. Anguiano. Influence of striated muscle activity on the lethal dose of k-strophanthoside. J. Pharmacol. Exp. Ther. 96(1):86-94, 1949

The action of the venom of a Mexican scorpion (Centruroides noxius Hoffmann) on cholinesterases. Brit. J. Pharmac. Chemistry 3(3):219-22, 1948

With L.C. Anguiano. Acciones del veneno de alacrán sobre la atividade motora del musculo estriado. Rev. Inst. Salubridad Enf. Tropicales 8(4):231-63, 1947

With E. Pardo & J. Derbez. Cihuapahtli, an activator of uterine motility (Montanoa tomentosa). Fed. Proc. 5(1-2):79, 1946 

Inhibitory responses of pregnant cat’s uterus to epinephrine and hypogastric stimulation. (1946)

With L.C. Anguiano. Physiological actions of scorpion venom (1946)

Estudios farmacologicos de algunas plantas usadas en la medicina azteca. Boletín Indigenista (1946)

With J. Gonzalez & T.H. Mendez. Acciones del veneno de alacrán sobre el aparato respiratorio. Rev. Inst. Salubr. Enferm. Trop. Mex. 6:77-84, 1945

With A. Rosenblueth. The changes of impedance of the turtle’s ventricular muscle during contraction. Amer. J. Physiol. 139:514-9, 1943

With A.A.P. Leão. The effects of hyperventilation and of blood-pressure changes on the self-sustained responses of the cerebral cortex. Amer. J. Physiol. 139:335-42, 1943

With A. Rosenblueth. The centrifugal course of Wallerian degeneration. Amer. J. Physiol. 139:247-54, 1943

With A. Rosenblueth. The electric responses of the tail pilomotors and nictitating membrane of the cat. Amer. J. Physiol. 137:263-79, 1942

With A. Rosenblueth. Accommodation in mammalian motor nerves. Amer. J. Physiol. 136:629-46, 1942

Transmission fatigue and contraction fatigue. Amer. J. Physiol. 135:763-71, 1942

El dinitrofenol 1-2-3-estimulante del metabolismo y su aplicación clinica. Thesis, UNAM (1935)

With A. Rosenblueth. The effects of veratrine upon the superior cervical ganglion. Amer. J. Physiol.


Associate Researcher, National Institute for Medical Research, London 

A bibliography is available in Boletín Estudios Med. Biol. 31:116-26, 1980