Michael Alan Arnold, PhD


Michael Arnold received a bachelor’s degree in Chemistry, and a doctoral degree in Nutritional Biochemistry and Metabolism at the Massachusetts Institute of Technology. His doctoral research was in the field of neuroendocrinology, and focused on the central control of growth hormone secretion. Dr. Arnold’s postdoctoral training included two years at Harvard Medical School as a Research Fellow in Neurology. His research was conducted in the laboratory of Joseph B. Martin, MD, PhD, the Head of Neurology at Harvard and at the Massachusetts General Hospital. Dr Arnold’s postdoctoral research focused on β-endorphin, a naturally occurring opioid-like brain peptide that modulates pain perception.

From 1981 to early 2000, Dr. Arnold held several senior management positions at Radionics, Inc.  He led development teams that led to the successful launch several product lines including epilepsy recording electrodes and hydrocephalus products. Other key company positions held by Dr. Arnold included Director of Regulatory Affairs and Quality Assurance, Director of Sales and Marketing, and President of Radionics Medical Products, a division of Radionics, Inc.  Dr. Arnold’s extensive experience in product development, regulatory affairs, and sales and marketing (both USA and international) will help position Cosman Medical for continued growth into the future.


Ph.D. Nutritional Biochemistry and Metabolism, Massachusetts Institute of Technology, 1979.

B.S. Chemistry, Massachusetts Institute of Technology, 1973


President, Cosman Medical, Inc., 2010-present

Director of Sales, Cosman Medical, Inc., 2004-2010

Director of Sales, Cosman Company, Inc., 2000-2004

President, Radionics Medical Products, Inc., 1995-2000

Director of Sales and Marketing, Radionics, Inc., 1992-1995

Director of Regulatory Affairs and Quality Assurance, Radionics, Inc.,1981-1992

Research in Neurology, Harvard Medical School and Massachusetts General Hospital, 1979-1981


  1. Arnold MA, Martin JB. Central control of anterior pituitary function. In: Handbook of Experimental Pharmacology, Vol. 90/II, pg. 89-136. Berlin:Springer Verlag, 1989.
  2. Chapman PH, Griebel R, Cosman ER, Arnold MA. The Effect of Position on Ventricular Pressure in Shunted and Unshunted Individuals. A Telemetric Study., Intracranial Pressure VI, Editors: M. Brock, et al, Springer-Verlag, 1986.
  3. Chapman PH, Cosman ER, Arnold MA. Telemetric ICP Monitoring after Surgery for Posterior Fossa and Third Ventricular Tumors., Annual Review of Hydrocephalus, pg. 45, Ed.: S. Matsumoto, K. Sato, N. Tamaki, and S. Oi, Neuron Publishing Co. (Tokyo), 1985.
  4. Chapman PA, Briebel R, Cosman ER, Arnold MA. ICP Measurements in Normal and Shunted Hydrocephalus Patients. Concepts in Pediatric Neurosurgery, pp. 115-132, Editor: P. H. Chapman, Publisher: Karger (New York), 1985.
  5. Spindel ER, Wurtman RJ, McCall A, Carr DB, Conlay L, Griffith L, Arnold MA. Neuroendocrine effects of caffeine in normal subjects. Clin Pharmacol Ther. Abstract 1984; 36(3):402–407.
  6. Chapman PH, Cosman ER, Arnold MA. Telemetric Intracranial Pressure Monitoring After Surgery for Posterior Fossa and Third Ventricular Tumors. Journal of Neurosurgery 1984; 60: 649-651.
  7. Millard WJ, Sagar SM, Badger TM, Carr DB, Arnold MA, Spindel E, Kasting NW, Martin JB. The effects of cysteamine on thyrotropin and β-endorphin secretion in the rat. Endocrinology 1983; 112:518-525.
  8. Arnold MA, Carr DB, Togasaki DM, Pian MC, Martin JB. Caffeine stimulates beta-endorphin release in blood but not in cerebrospinal fluid. Life Sciences 1982; 6:31(10):1017–1024.
  9. Arnold MA,· Reppert SM, Rorstad OP, Sagar SM, Keutmann HT, Perlow MJ, Martin JB. Temporal patterns of somatostatin immunoreactivity in the cerebrospinal fluid of the rhesus monkey: effect of environmental lighting. Journal of Neuroscience 1982; 2:674-680.
  10. Sagar SM, Landry D, Millard WJ, Badger TM, Arnold MA, Martin JB. Depletion of somatostatin-like immunoreactivity in the rat central nervous system. Journal of Neuroscience 1982; 2:225-231.
  11. Carr DB, Bergland R, Hamilton A, Blume H, Kasting NW, Arnold MA, Martin JB, Rosenblatt M.· Endotoxin stimulated opiod peptide secretion: Two secretory pools and feedback control in vivo.1982; Science 1982;· 217:845-848.
  12. Kasting NW, Martin JB, Arnold MA. Pulsatile somatostatin release from the median eminence of the unanesthetized rat and its relationship to plasma growth hormone levels. Endocrinology 1981; 109: 1739-1745.
  13. Arnold MA, Fernstrom JD.· L-Tryptophan injection enhances pulsatile growth hormone secretion in the rat. Endocrinology 1981; 108: 331-335.
  14. Spindel ER, Arnold, MA, Cusack B, Wurtman RJ. Effects of caffeine on anterior pituitary and thyroid function in the rat. J. Pharmacol. Exp. Ther. 1980; 214: 58-62.
  15. Arnold MA, Fernstrom JD. Administration of antisomatostatin serum to rats reverses the inhibition of pulsatile growth hormone secretion produced by injection of metergoline but not yohimbine. Neuroendocrinology 1980; 31(3):194–199.
  16. Cosman ER, Zervas NT, Chapman PH, Cosman BJ, Arnold MA. A telemetric pressure sensor for ventricular shunt systems. Surgical Neurology 1979; 11: 287-294.
  17. Fernstrom JD, Arnold, MA, Wurtman, RJ, Hammarstrom-Wiklund B, Munro HN, Davidson CS. Diurnal variations in plasma insulin concentrations in normal and cirrhotic subjects. Journal of Neural Transmission Suppl. 1978; 14: 133-142.
  18. Arnold MA, Fernstrom JD. Serotonin receptor antagonists block a natural, short-term surge in serum growth hormone levels. Endocrinology 1978; 103: 1159-1164.
  19. Arnold MA, Fernstrom JD. Salicylate reduces serum insulin concentrations in the rat. Life Sciences 1976; 19(6): 813-817.


National Institute of Mental Health Predoctoral Fellowship

National Science Foundation Postdoctoral Fellowship

National Institutes of Health Postdoctoral Fellowship

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